Imaging apparatus equipped with image enlarging display function

Imaging apparatus equipped with image enlarging display function
US008736736B2
(12) United States Patent
(10) Patent N0.:
(45) Date of Patent:
Hoshino et a].
(54)
(56)
IMAGING APPARATUS EQUIPPED WITH
U.S. PATENT DOCUMENTS
RECORDING MEDIUM RECORDING
CONTROL PROGRAM OF THE IMAGING
APPARATUS, AND CONTROL METHOD OF
THE IMAGING APPARATUS
(75) Inventors: Hiroyuki Hoshino, Ome (JP); Erina
Ichikawa, Sagamihara (JP); Hiroshi
Shimizu, Akishima (JP); Jun Muraki,
Hamura (JP)
7,710,458 B2
7,864,240 B2
7,936,396 B2
5/2010 Yuyama et a1.
1/2011 Ide et al.
5/2011 Okazaki
2002/0097325 A1
7/2002 Tanizoe et al.
2005/0122402 A1*
6/2005
2009/0231448 A1
2010/0231748 A1
9/2009 Yuyama et a1.
9/2010 Takeda
Kumaki ................... .. 348/208.1
FOREIGN PATENT DOCUMENTS
CN
CN
JP
JP
(73) Assignee: Casio Computer Co., Ltd., Tokyo (JP)
Notice:
May 27, 2014
References Cited
IMAGE ENLARGING DISPLAY FUNCTION,
*
US 8,736,736 B2
Sub'ect
to any disclaimer, the term of this
J
patent is extended or adjusted under 35
101132485
101444084
11-55560
11-341331
A
A
A
A
2/2008
5/2009
2/1999
12/1999
(Continued)
U.S.C. 154(b) by 521 days.
OTHER PUBLICATIONS
(21) Appl.No.: 12/975,sss
(22) Filed:
Japanese Of?ce Action dated Nov. 29, 2011 (and English translation
thereof) in counterpart Japanese Application No. 2009-293577.
Dec. 22, 2010
(Continued)
(65)
Prior Publication Data
Primary Examiner * Paul Berardesca
US 2011/0157385 A1
Jun. 30, 2011
(74) Attorney, A gent, or Firm * HoltZ, HoltZ, Goodman and
Chick, PC
(30)
Foreign Application Priority Data
(57)
Dec. 25, 2009
(JP) ............................... .. 2009-293577
ABSTRACT
An imaging apparatus includes a display section to sequen
tially display each of the images generated by the imaging
(51)
Int. Cl.
(52)
H04N 5/222
US. Cl.
section and an enlargement display control section to sequen
tially display parts of the images generated by the imaging
(2006.01)
section on the display section While enlarging the parts by a
predetermined enlargement factor. The imaging section
changes the enlargement factor of the enlargement display
USPC ............ .. 348/333.12; 348/208.99; 348/240.2;
348/333.03; 348/333.11; 396/52
(58)
control section according to a shake quantity detected by the
Field of Classi?cation Search
USPC ............. .. 348/333.12, 208.99, 208.2, 333.11,
detecting section or an optical zoom magni?cation of an
optical zoom section.
348/240.2, 333.03; 396/52, 53
See application ?le for complete search history.
15 Claims, 9 Drawing Sheets
$103
PERFGRM AUTOMATIC
FOCUSWG PROCESSWG
DEERMWE TARGU ENLARGEMENT FACTOR
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$11 0
ARE SET
MARGEMEN I FACTGR
AN D TARGET EN LARGEMENT
NO
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CALCULATE TlME-BASED VARlATlON
QUANTITY OF ENLARGEMENT FMTO -
v ES
PEHORM “ME-BASED VARWHON OF
QET ENLARGEMENT FACTOR TD
TARGET ENLARGEWNI FACTOR
was so
8113
ENLARGEMENT FACTOR REACH
TARGET ENLARGEMENT
FACTQW
was
PERFORM OTHER PROCESSWG
S115
S114
US 8,736,736 B2
Page 2
(56)
References Cited
OTHER PUBLICATIONS
FOREIGN PATENT DOCUMENTS
JP
JP
JP
JP
JP
JP
TW
W0
2006-267217 A
2008-054062
2008-079124
2009-177345
2009-177345
2010-016613
200833087
WO 2006/135107 2
10/2006
3/2008
4/2008
8/2009
8/2009
1/2010
8/2008
12/2006
........... ..
H04N 5/225
Korean Of?ce Action dated Jun. 27, 2012 and English translation
thereof in counterpart Korean Application No. 10-2010-0134676.
Chinese Of?ce Action dated Sep. 26, 2012 (and English translation
thereof) in counterpart Chinese Application No. 2010106250854.
Korean Of?ce Action dated Dec. 28, 2012 (and English translation
thereof) in counterpart Korean Application No. 10-2010-0134676.
Taiwanese Of?ce Action dated Jun. 19, 2013 (and English translation
thereof) in counterpart Taiwanese Application No. 099145687.
* cited by examiner
US. Patent
May 27, 2014
Sheet 1 0f 9
US 8,736,736 B2
1
IMAGING APPARATUS
10
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20
CONTROL SECTION
11,.»
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CPU
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IMAGING SECTION
12'» MEMORY SECTION
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STORAGE SECTION 1“
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SECTION
40
F
,1
DRIVING SECTION
>
IMAGING DEVICE w 41
DRIVING SECTION
LENS DRIVING
,v 42
SECTION
50
H
4
SHAKE QUANTITY
DETECTTNG SECTION
60
rJ
OPERATING SECTION
F
30
<
80
F1
DISPLAY SECTION
<
TIMER SECTTON
US. Patent
May 27, 2014
Sheet 2 0f9
US 8,736,736 B2
500
FEG. 2A
s
7
US. Patent
May 27, 2014
Sheet 3 0f9
US 8,736,736 B2
F B G. 3
SHAKE QUANTITY
OPTiCAL ZOOM
1
2
3
1
1
2
3
2
2
4
s
3
3
6
MAGNIFICATION
Y
9
US. Patent
May 27, 2014
Sheet 4 0f9
US 8,736,736 B2
PEG. 4
SET SET ENLARGEMENT
‘_,\, SHM
FACTOR TO I \‘TTTAL VALUE
‘
‘
‘i'
8102
NO
IS TMAGTNG MODE
‘
SWTTCHED TO MANUALLY
FOCUSENG MODE?
YES
1
TMAGE SUBJECT & GENERATE IMAGE
f» 8104
TS DISPLAY
FOCUS ADJUSTING
SCREEN SE
8103
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,1
PERFORM AUTOMATTC
FOCUSTNG PROCESSENG
ENLARGE PART OF TMAGE BY SET
ENLARGEMENT FACTOR To DTSPLAY IT
y
OBTAIN SHAKE QUANTTTY AND
OPTTCAL ZOOM MAGNTFICATTON
S109
IDETERMINE TARGET ENLARGEMENT FA0T0R|
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8106
'BTSPLAY WHOLE IMAGE
ARE SET
EN LARGEMENT FACTOR
AND TARGET ENLARGEMENT
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FACTOR SAME?
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QUANTTT‘T’ OE ENLARGEMENT FACTOR
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PERFORM TIME~BASED VARIATTON OF
SET ENLARGEMENT FACTOR TO
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TARGET ENLARGEMENT
8113
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PERFORM OTHER PROCESSING
ST’TS
TV 8114
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7 TS IMAGTNG ENDED?
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US. Patent
May 27, 2014
Sheet 5 0f9
US 8,736,736 B2
1a
iMAGING APPARATUS
10
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20
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LENS DRiVING
SECTION
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H
OPERATING SECTION
1%
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DISPLAY SECTION
A
TIMER SECTION
N 42
US. Patent
May 27, 2014
Sheet 6 0f9
US 8,736,736 B2
HG. 6A
DEFLECTiON QUANTETY
EVALUAT10N VALUE
1
1
2
2
s
3
4
5
4
5
FIG. 6B
EVALUAWWALUE
EEEA‘QSGTQQAEENJTiZEESR
1 ~ 4
INCREASE
5 ~15
KEEP
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US. Patent
May 27, 2014
Sheet 7 0f9
US 8,736,736 B2
PEG. 7
SET SET ENLARGEMENT
$301
FACTOR TO lNiTlAL VALUE
N
S102
18 TAAAETNE MODE
SWiTCHED TO MANUALLY
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i YES
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EXTRACT EVALUATION VALUE
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PERFORM TIME-BASED VARLATéON
OF SET ENLARGEMENT FACTOR
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iNCREASEIDECREASE QUANTLTY
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US. Patent
May 27, 2014
US 8,736,736 B2
Sheet 8 0f 9
1b
IMAGING APPARATUS
10
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20
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US. Patent
May 27, 2014
Sheet 9 0f9
US 8,736,736 B2
FIG_ 9
SET SET ENLARGEMENT
m 8101
FACTOR TO INITIAI~ VALUE
If
8102
IS IMAGING MODE
SWITCHED TO MANUALLY
FGCUSING MODE?
I
IMAGE SUBJECT & GENERATE IMAGE
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$105
IS DISPLAY OF
FOCUS ADJUSTING CONFIRMATION
SCREEN SELECTED?
NO
YES
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US 8,736,736 B2
1
2
IMAGING APPARATUS EQUIPPED WITH
IMAGE ENLARGING DISPLAY FUNCTION,
ment display control section according to the shake quantity
RECORDING MEDIUM RECORDING
CONTROL PROGRAM OF THE IMAGING
APPARATUS, AND CONTROL METHOD OF
THE IMAGING APPARATUS
Moreover, another aspect of the present invention is an
imaging apparatus equipped with an imaging section to gen
detected by the detecting section.
erate images by imaging a subject, comprising:
an optical zoom section to set an optical zoom magni?ca
tion to an arbitrary magni?cation;
a display section to sequentially display each of the images
BACKGROUND OF THE INVENTION
generated by the imaging section according to the optical
zoom magni?cation set by the optical zoom section;
an enlargement display control section to sequentially dis
1. Field of the Invention
The present invention relates to an imaging apparatus
play parts of the images generated by the imaging section
equipped with an enlargement display function of performing
according to the optical zoom magni?cation set by the optical
an enlargement display of a part of an imaging image, a
zoom section on the display section while further enlarging
recording medium recording a control program of the imag
ing apparatus, and a control method of the imaging apparatus.
2. Description of the Related Art
the parts by a predetermined enlargement factor; and
an enlargement factor control section to change the
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the optical zoom
magni?cation set by the optical zoom section.
An imaging apparatus, such as a digital camera, which is
equipped with a liquid crystal display monitor, composed of
a liquid crystal display (LCD), and uses the display screen of
the liquid crystal display monitor as a view?nder by the use of
an image displayed as a live view has conventionally been
known. Because the resolution of the liquid crystal display
monitor is lower than that of the imaging device of the imag
ing apparatus, the imaging apparatus has the problem in
20
apparatus including an imaging section to generate images by
imaging a subject, a display section to sequentially display
each of the images generated by the imaging section, and a
25
which it cannot be easily judged with the screen of the liquid
crystal display monitor whether the focus of an image is
correctly adjusted or not when a user performs a focus adjust
ment by a manual operation.
An imaging apparatus is accordingly known that makes it
possible to easily sight whether a focus is adjusted or not by
30
displaying an image imaged by an imaging device by enlarg
ing the image by a predetermined enlargement factor on the
display screen of a liquid crystal display monitor at the time of
a manual operation in an imaging apparatus capable of per
forming the manual operation of focus adjustment (see, for
Moreover, another aspect of the present invention is an
recording medium recording a control program of an imaging
35
detecting section to detect a shake quantity of the imaging
apparatus, the recording medium recording a program
enabling a computer of the imaging apparatus to function as
an enlargement display control section to display parts of
the images sequentially generated by the imaging section on
the display section while enlarging the parts by a predeter
mined enlargement factor; and
an enlargement factor control section to change the
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the shake quantity
detected by the detecting section.
example, Japanese Patent Application Laid-Open Publica
Furthermore, another aspect of the present invention is a
recording medium recording a control program of an imaging
tions Nos. H 11-341331 and H 11-055560).
apparatus including an imaging section to generate images by
The imaging apparatus described in Japanese Patent Appli
cation Laid-Open Publications Nos. H 11-341331 and H
11-055560, however, have the problem in which it is appre
hended that the focus adjustment when the setting of an
enlargement factor is not proper at the time of displaying an
40
play section to sequentially display each of the images gen
erated by the imaging section according to the optical zoom
magni?cation set by the optical zoom section, the recording
image on a liquid crystal display monitor by enlarging the
image is made to be more dif?cult by the enlarged image. For
example, if an enlargement factor is set to be high despite a
45
tion set by the optical zoom section while further enlarging
50
SUMMARY OF THE INVENTION
55
equipped with an imaging section to generate images by
imaging a subject, comprising:
a display section to sequentially display each of the images
generated by the imaging section;
an enlargement display control section to sequentially dis
60
play parts of the images generated by the imaging section on
the display section while enlarging the parts by a predeter
the imaging section on the display section while enlarging the
parts by a predetermined enlargement factor; and
a detecting section to detect a shake quantity of the imaging
an enlargement factor control section to change the
enlargement factor at a time of enlargement by the enlarge
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the optical zoom
magni?cation set by the optical zoom section.
Furthermore, another aspect of the present invention is a
control method of an imaging apparatus including an imaging
section to generate images by imaging a subject, a display
section to sequentially display each of the images generated
by the imaging section, and a detecting section to detect a
shake quantity of the imaging apparatus, the control method
comprising the steps of:
sequentially displaying parts of the images generated by
mined enlargement factor;
apparatus; and
the parts by a predetermined enlargement factor; and
an enlargement factor control section to change the
makes the focus adjustment dif?cult.
An aspect of the present invention is an imaging apparatus
medium recording a program enabling a computer of the
imaging apparatus to function as
an enlargement display control section to sequentially dis
play parts of the images generated by the imaging section on
the display section according to the optical zoom magni?ca
state in which a camera shake has happened or a state in which
the optical zoom magni?cation of an optical zoom is high,
then a subject in a display screen easily performs a large
position change, and consequently the subject is missed to
imaging a subject, an optical zoom section to set an optical
zoom magni?cation to an arbitrary magni?cation, and a dis
65
changing the enlargement factor at a time of enlargement at
the step of sequentially displaying the parts according to the
shake quantity detected by the detecting section.
US 8,736,736 B2
4
3
Furthermore, according to the other aspect of the present
invention is a control method of an imaging apparatus includ
as shown in FIG. 1, the imaging apparatus 1 is composed of a
control section 10, an imaging section 20, an image process
ing an imaging section to generate images by imaging a
ing section 30, a driving section 40, a shake quantity detecting
subject, an optical zoom section to set an optical zoom mag
ni?cation to an arbitrary magni?cation, and a display section
5
to sequentially display each of the images generated by the
imaging section according to the optical zoom magni?cation
set by the optical zoom section, the control method compris
ing the steps of:
section 50, an operating section 60, a timer section 70, a
display section 80, and a storage section 90.
The imaging section 20 generates an image by imaging a
subject. To put it concretely, the imaging section 20 is com
posed of an image lens section, an iris mechanism, an elec
tronic imaging section, an imaging processing section, and
the like, although their illustration is omitted.
sequentially displaying parts of the images generated by
while further enlarging the parts by a predetermined enlarge
The image lens section is equipped with a zoom lens, a
focus lens, and the like, and forms an image on an electronic
imaging section on the basis of the light from a subject.
ment factor; and
changing the enlargement factor at a time of enlargement at
the image lens section in accordance with an iris value con
the imaging section on the display section according to the
optical zoom magni?cation set by the optical zoom section
The iris mechanism narrows down the light output through
the step of sequentially displaying the parts according to the
optical zoom magni?cation set by the optical zoom section.
BRIEF DESCRIPTION OF THE DRAWINGS
20
FIG. 1 is a block diagram showing the con?guration of the
principal part of an imaging apparatus according to an
embodiment l of the present invention;
FIG. 2A is a view of a screen of a display section displaying
the live view display of an image and shows a state in which
trolled by the control section 10 to adjust the exposure of the
lens section.
The electronic imaging section is composed of an imaging
device, such as a charge coupled device (CCD) or a comple
mentary metal-oxide semiconductor (CMOS), and the elec
tronic imaging section converts a subject image, formed by
the light that has passed through the various lenses and the iris
mechanism of the image lens section, into a two-dimensional
image signal.
25
The imaging processing section is equipped with, for
example, a timing generator and a vertical driver, although
their illustration is omitted. Then, the imaging processing
an enlarged image is displayed over the whole display screen;
FIG. 2B is a view of a screen of a display section displaying
section drives the electronic imaging section to perform scan
the live view display of an image and displays an enlarged
image only in a part of the display screen;
value table of the embodiment l of the present invention;
FIG. 4 is a ?ow chart for describing enlargement factor
ning with the timing generator and the vertical driver, and
makes the electronic imaging section convert a subject image
into a two-dimensional image signal every predetermined
period. Then, the imaging processing section reads out an
adjusting processing of the imaging apparatus of the embodi
image frame for every one screen from the image region of the
FIG. 3 is a schematic diagram for describing an evaluation
ment 1 of the present invention;
FIG. 5 is a block diagram showing the con?guration of the
principal part of an image apparatus according to an embodi
ment 2 of the present invention;
FIG. 6A is a diagram illustrating an evaluation value table
for describing the determination processing of variations or
keep of a set enlargement factor in the embodiment 2 of the
30
35
electronic imaging section to output the read-out image frame
to the image processing section 30.
The image processing section 30 performs image quality
adjusting processing, resolution converting processing,
image compressing processing, and the like, on the basis of an
40
image frame transferred from the imaging section 20 (imag
ing processing section) to perform the processing of convert
ing an image generated by the imaging section 20 into an
image for displaying or an image for recording. To put it
present invention;
FIG. 6B is a diagram illustrating an evaluation value cor
respondence table for describing the determination process
concretely, the image processing section 30 suitably adjusts
ing of variations or keep of a set enlargement factor in the
the gain of each color component of red (R), green (G), and
blue (B) of the signal of an analog value of the image frame
transferred from the image processing section before per
forming the sample hold of the each color component with a
sample hold circuit (the illustration thereof is omitted) to
convert the color component subj ected to the sample hold into
digital data with an analog-to-digital (A/D) converter (the
embodiment 2 of the present invention;
FIG. 7 is a ?ow chart for describing enlargement factor
45
adjusting processing of the imaging apparatus of the embodi
ment 2 of the present invention;
FIG. 8 is a block diagram showing the con?guration of the
principal part of an image apparatus according to an embodi
ment 3 of the present invention; and
FIG. 9 is a ?ow chart for describing enlargement factor
50
illustration thereof is omitted). Then, the image processing
section 30 performs the color process processing, including
pixel interpolation processing and y correction processing, of
adjusting processing of the imaging apparatus of the embodi
ment 3 of the present invention.
55
DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS
In the following, concrete aspects of the present invention
will be described with reference to the accompanying draw
ings. The scope of the invention is, however, not limited to the
the digital data with a color process circuit (the illustration
thereof is omitted) before generating a luminance signal Y
and chrominance difference signals Cb and Cr, each having a
digital value. The luminance signal Y and the chrominance
difference signals Cb and Cr output from the color process
circuit are subjected to direct memory access (DMA) transfer
60
to a memory section 12 of the control section 10 with a DMA
controller (the illustration thereof is omitted).
The driving section 40 is composed of a motor and gears
shown examples.
(their illustration is omitted) and performs driving according
Embodiment 1
65
An imaging apparatus 1 according to the present embodi
ment is a digital camera imaging a subject, or the like. Then,
to a control signal output from the control section 10. Then,
the driving section 40 is composed of an imaging device
driving section 41 to drive the imaging device at the time of
imaging a subject with the imaging section 20, a lens driving
US 8,736,736 B2
5
6
section 42 to move the zoom lens and the focus lens into an
with the operating section 60. That is, a user can uses the
optical axis direction, and the like.
The shake quantity detecting section 50 is composed of a
manually focusing mode.
display screen of the display section 80 as view?nder in the
The storage section 90 is composed of a nonvolatile
memory or the like and stores an image output from the image
processing section 30 as image data to be stored. Then, the
storage section 90 is con?gured in such a way that, when a
not-illustrated gyro sensor and an operation circuit. Then, the
shake quantity detecting section 50 is con?gured to detect the
angular velocity in each of two axial directions with the gyro
sensor as a shake quantity detecting sensor, and to perform the
switching operation to the reproducing mode is executed in
the operating section 60, image data stored in the storage
section 90 is read-out by the control section 10, and the
operation processing of calculating a shake quantity of the
imaging apparatus 1 on the basis of a detected angular veloc
ity with the operation circuit, and further to output the calcu
read-out image data is displayed on the display screen of the
display section 80 as a reproducing image.
The control section 10 is composed of a central processing
unit (CPU) 11 and the memory section 12, and performs the
lated shake quantity to the control section 10.
The operating section 60 is equipped with a switching
button for switching an imaging mode for performing imag
ing by the imaging section 20 to a reproducing mode for
reproducing (displaying) the imaged image on the display
section 80 and vice versa; a shutter button for executing
imaging processing by the imaging section 20; a switching
switch for switching between a focus adjustment mode by a
user’s manual operation (manually focusing mode) and a
20
integrated control of each section of the imaging apparatus 1.
To put it concretely, the control section 10 performs the drive
control of the driving section 40 (imaging device driving
section 41 and lens driving section 42) according to an imag
ing operation, a setting operation of the optical zoom magni
?cation, and an adjustment operation of a focus position by a
focus adjustment mode by automatic operation (automatic
user with the operating section 60; automatic exposure pro
focusing mode); an adjustment button for performing a focus
adjustment in a state of being switched into the manually
focusing mode; a display button for displaying a focus adjust
ing con?rmation screen; a setting button for setting an optical
zoom magni?cation (the magni?cation of an optical zoom by
cessing (AE processing) of automatically adjusting the expo
sure conditions (the conditions of, for example, a shutter
speed and an iris value) at the time of imaging of an subject by
25
automatically adjusting the focus lens to a focus position of a
subject when the operating section 60 is switched to the
a zoom lens) to an arbitrary magni?cation; and the like. Then,
automatic focusing mode, and the like.
the operating section 60 is con?gured to output operation
signals according to the contents of operations to the control
section 10 when the user operates a button or a switch. Con
That is, the control section 10 functions as an enlargement
30
sequently, various kinds of control processing according to
the contents of the operations are executed by the control
section 10, to which the operation signals have been input.
In addition, the display button may be made to function as
a button the depressed period of which the control section 10
the imaging section 20; automatic focusing processing of
35
display control section to sequentially display parts of the
images sequentially generated by the imaging section 20 on
the display section 80 while enlarging the parts by a prede
termined enlargement factor, an enlargement factor control
section to change the enlargement factor according to the
shake quantity detected by the shake quantity detecting sec
tion 50, a focus adjusting section to perform a focus adjust
judges as a period indicating that a user has determined that a
ment by a manual operation or a focus adjustment by an
focus adjusting con?rmation screen should be displayed only
during the period. Furthermore, the display button may be a
automatic focus adjustment, a frame display controlling sec
tion to display a frame showing an object region of enlarge
button capable of performing a toggle operation for making
the control section 10 perform the toggle operation, in which,
40
focus adjustment by the focus adjusting section, on the dis
play section 80.
when a user once depresses the display button, the control
section 10 executes the operation mode at the time when a
display of the focus adjusting con?rmation screen is selected,
and when the user again depresses the display button, the
control section 10 releases the operation mode. Furthermore,
the operation section 60 may be con?gured in such a way that
The CPU 11 performs various control operations in accor
dance with various processing programs for the imaging
45
50
factor adjustment program are given, and as the data stored in
the memory section 12, an evaluation value table, described
below, pertaining to the execution of the enlargement factor
the imaging section 20 on the display screen. To put it con
55
encoder or the like, although the illustration thereof is omit
to generate a video signal under the control of the image
control section 10. Then, the display section 80 displays the
60
signal.
section 20 according to the optical zoom magni?cation set
display of the images sequentially generated by the imaging
section 20 on the display section 80 while enlarging the parts
of the images by a predetermined enlargement factor.
Furthermore, when a user performs a switching operation
to the manually focusing mode with the operating section 60,
the display section 80 displays (live view display) all of the
images continuously on the display screen, the images being
based on a plurality of image frames imaged by the imaging
adjustment program is given.
Next, the various programs stored in the memory section
12 will be described.
The enlargement display control program is a program for
enabling the CPU 1 1 to execute the function of controlling the
ted, and performs the encoding processing of an input image
image on the display screen thereof on the basis of the video
and the like, and a program memory for storing the various
programs and data pertaining to the execution of the CPU 11.
Then, as the programs stored in the memory section 12, an
enlargement display control program and an enlargement
memory section 12 to display the imaged image imaged by
cretely, the display section 80 is equipped with a digital video
apparatus 1 stored in the memory section 12.
The memory section 12 is composed of a buffer memory
for temporarily storing the data to be processed by the CPU 11
a user can set the functions of the display button in advance
with a menu operation.
The timer section 70 is con?gured to time a time and output
a signal pertaining to the timed time to the control section 10.
The display section 80 reads out an image stored in the
ment or an subject region, which is an object of the automatic
To put it concretely, when a user perform the switching to
65
the manually focusing mode with the switching switch of the
operating section 60 and depresses the display button in the
manually focusing mode, the CPU 11 performs the trimming
and enlargement processing of the images sequentially
US 8,736,736 B2
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7
imaged by the imaging section 20 as the objects of live view
Furthermore, the CPU 11 calculates the time-based varia
displays (that is, the images imaged by the imaging section 20
tion quantity of the enlargement factor by dividing the differ
according to the optical zoom magni?cation set by the oper
ating section 60), and thereby performs the control of display
ence quantity between the set enlargement factor and the
target enlargement factor by the total sum of the time neces
ing the parts of the images on the display section 80 as focus
adjusting con?rmation screens 500 while further enlarging
enlargement factor (set enlargement factor) at the time of
sary for changing the enlargement factor in order that the
the parts by the predetermined enlargement factor (the
displaying a part of an image by enlarging it at the time of the
execution of the enlargement display control program may
enlargement factor set beforehand as an initial value or the
gradually approach the determined target enlargement factor.
Then, the CPU 11 performs the processing of changing the
enlargement factor to be changed at the time of the execution
of the enlargement factor adjustment program, described
below). As shown in FIG. 2A, one of the focus adjusting
enlargement factor over time on the basis of the calculated
time-based variation quantity.
In addition, although the integrated values of the optical
con?rmation screens 500 may be con?gured to perform a
display over the whole of the display screen of the display
zoom magni?cations and the shake quantities are made as
section 80, or as shown in FIG. 2B, the focus adjusting con
?rmation screen 500 may be con?gured to perform the dis
play only in a part of the display screen of the display section
80 in which an ordinary live view display is performed (that is
the live view display to which the aforesaid enlargement
processing and the like are not performed) here. Furthermore,
it is needless to say that the imaging apparatus 1 may be
con?gured in such a way that the CPU 1 1 performs the control
of a display by switching a pattern in which the focus adjust
ing con?rmation screen 500 is displayed over the whole dis
play screen and a pattern in which the focus adjusting con?r
mation screen 500 is displayed only in a part of the display
screen by the operation of the operating section 60 by a user.
The enlargement factor adjustment program is a program
for enabling the CPU 11 to execute the function of changing
the enlargement factor at the time of displaying a part of an
image by enlarging the part at the time of the execution of the
enlargement display control program on the basis of the shake
evaluation values in the evaluation value table in FIG. 3, it is
needless to say that, for example, the target enlargement
factors themselves may be described as the evaluation values.
(Enlargement Factor Adjusting Processing)
Next, the enlargement factor adjusting processing by the
20
First, when the power source is turned on by a user with the
25
30
S102: No), the CPU 11 presumes that the focusing mode is
switched to the automatic focusing mode and executes the
35
40
tion 50, and obtains an optical zoom magni?cation on the
basis of a drive control signal output to the lens driving
section 42. That is, the CPU 11 obtains the camera shake
quantity and the optical zoom magni?cation as parameters
when a part of an image is displayed on the display section 80
by being enlarged and a user performs a focus adjustment in
the manually focusing mode. Then, the CPU 11 reads out an
evaluation value table shown in FIG. 3 from the memory
section 12 and extracts an evaluation value corresponding to
the obtained parameters (shake quantity and optical zoom
focusing processing, an automatic focusing (AF) frame
showing the subject region of an object of the focus adjust
ment in automatic focusing is displayed in place of perform
ing the focus con?rming enlargement display.
50
enlargement factor (the target value of the enlargement factor
55
display section 80 is enlarged, here, the larger the values of
On the other hand, if the CPU 11 judges that the focusing
mode is switched to the manually focusing mode at Step S102
(Step S102: Yes), the CPU 11 images a subject with the
imaging section 20 to generate an image (Step S104).
Next, the CPU 11 judges whether the user operates the
operating section 60 (display button) to select the display of a
focus adjusting con?rmation screen or not (Step S105).
Then, if the CPU 11 judges that the display of the focus
adjusting con?rmation screen is not selected at Step S105
60
adjustment of a user becomes dif?cult in the manually focus
ing mode. Consequently, the CPU 11 determines the target
enlargement factor in such a way that the larger the evaluation
value corresponding to the integrated value of an optical
zoom magni?cation and a shake quantity in the evaluation
value table is, the smaller the value of the target enlargement
factor is.
advances the processing to that at Step S114. In addition, in
the automatic focusing processing, the CPU 11 performs an
ordinary live view display for displaying the whole of an
image according to an optical zoom magni?cation on the
display screen of the display section 80 without performing
any focus con?rming enlargement display unlike the execu
described below. Then, in a live view display in the automatic
45
after a change when the enlargement factor is changed)
according to the extracted evaluation value.
the shake quantity and the optical zoom magni?cation are, the
more the subject in the display screen easily performs a large
position change and is easily missed. Then, in the state in
which the optical zoom magni?cation is large, the focus
automatic focusing processing (Step S103), and the CPU 11
tion processing of the enlargement display control program
by the CPU 11 in the manually focusing mode, which will be
magni?cation). Then, the CPU 11 determines a target
In the state in which a part of the image displayed on the
manually focusing mode is kept or not) (Step S102).
Then, if the CPU 11 judges that the focusing mode is not
enlarged.
execution of the enlargement display control program, the
CPU 11 executes the enlargement factor adjustment program
to input a shake quantity (camera shake quantity) of the
imaging apparatus 1 from the shake quantity detecting sec
operating section 60 and the imaging apparatus 1 is switched
to the imaging mode, the CPU 11 sets the set enlargement
factor to the initial value determined beforehand (Step S101).
Next, the CPU 11 judges whether the user has operated the
operating section 60 (switching switch) to switch the focus
ing mode to the manually focusing mode or not (whether the
switched to the manually focusing mode at Step S102 (Step
quantity and the optical zoom magni?cation when the part of
the image is displayed on the display section 80 by being
To put it concretely, when a part of an image is displayed by
being enlarged as a focus adjusting con?rmation screen by the
imaging apparatus 1 according to the present embodiment
will be described with reference to the ?ow chart shown in
FIG. 4.
(Step S105: No), the CPU 11 makes the display section 80
display the whole image (that is, the image itself that has not
been subjected to enlargement processing) generated at Step
S104 (Step S106), and advances the processing to that at Step
S114 (the processing of an ordinary live view display is
performed).
On the other hand, if the CPU 11 judges that the display of
65
the focus adjusting con?rmation screen has been selected
(Step S105: Yes), the CPU 11 executes the enlargement dis
play control program to display a part of the image generated
US 8,736,736 B2
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at Step S104 by enlarging by the set enlargement factor (Step
S107). Then, the user sights the image enlarged at Step S107
The imaging apparatus 1 obtains the parameters when a
part of an image is displayed on the display section 80 by
being enlarged (when a user performs a focus adjustment or
on the display section 80 and performs the operation of the
operating section 60 (adjustment button) for a focus adjust
ment and the operation of the operating section 60 (setting
button) for changing the optical zoom magni?cation as the
an adjustment of an optical zoom magni?cation in the manu
ally focusing mode), and can change the enlargement factor at
the time of displaying the part of the image by enlarging it at
the time of the execution of the enlargement display control
occasion demands.
program on the basis of the obtained parameters. That is, the
situation in which the enlargement factor at the time of dis
playing an image on the display section 80 is not suitable and
Next, the CPU 11 executes the enlargement factor adjust
ment program to obtain the shake quantity of the imaging
apparatus 1 and the optical zoom magni?cation (Step S108).
a subject in the display screen performs a large position
Then, the CPU 11 extracts the evaluation value corresponding
change to make a user’s focus adjustment di?icult can be
to the parameters (shake quantity and optical zoom magni?
prevented by con?guring the imaging apparatus 1 to be able
cation) obtained at Step S108 from the evaluation value table
of the memory section 12 to determine the target enlargement
factor (Step S109). The CPU 11 judges whether the set
enlargement factor and the target enlargement factor deter
to change the enlargement factor as described above.
Consequently, it can be said that the imaging apparatus 1
can perform a focus adjustment by a manual operation on the
basis of an image displayed by a live view display and the
mined at Step S109 are the same or not here (Step S110), and
if the CPU 11 judges that the both are the same (Step S110:
focus adjustment can easily be performed.
Furthermore, in the imaging apparatus 1, an optical zoom
Yes), then the CPU 11 does not change the enlargement factor
but advances the processing to that at Step S114.
On the other hand, if the CPU 11 judges that the both are
not the same at Step S110 (Step S110: No), the CPU 11
calculates the time-based variation quantity (the variation
quantity per unit time) of the enlargement factor from the
difference quantity between the set enlargement factor and
20
operating section 60, and the whole of an image generated by
the imaging section 20 can be displayed on the display section
80 according to the optical zoom magni?cation set with the
operating section 60. A part of the image generated by the
25
imaging section 20 according to the set optical zoom magni
?cation can be displayed on the display section 80 while
further enlarging the part by a predetermined enlargement
factor. That is, the imaging apparatus 1 is separately equipped
the target enlargement factor (Step S111).
Next, the CPU 11 performs the time-based variation
(changes a predetermined quantity every unit time) of the set
enlargement factor toward the target enlargement factor on
the basis of the time-based variation quantity calculated at
magni?cation can be set to an arbitrary magni?cation with the
with the enlargement display function of a part of an image
30
through trimming and enlargement processing in addition to
an optical zooming function using a zoom lens.
Step S111 (Step S112). Then, the CPU 11 judges whether the
Furthermore, the imaging apparatus 1 changes a set
set enlargement factor has reached the target enlargement
enlargement factor in such a way that the larger the values of
factor or not on the basis of whether time has reached a
predetermined time from the starting point of time of the
35
is. That is, the larger the values of the shake quantity and the
processing at Step S112 or not on the basis of a signal per
taining to the time, which signal is output from the timer
section 70 (Step S113). If the CPU 11 judges that the set
enlargement factor has not reached the target enlargement
factor (Step S113: No), the CPU 11 repeats the processing on
and after Step S112.
On the other hand, if the CPU 1 1 judges that the set enlarge
ment factor has reached the target enlargement factor at Step
S113 (Step S113:Yes), the CPU 11 performs the other pieces
of processing, such as focus adjusting processing/optical
zoom magni?cation adjusting processing according to a
optical zoom magni?cation are, the larger the position change
of a subject in a display screen is, and the more a focus
adjustment becomes dif?cult. Consequently, a user’s focus
40
adjustment can be made easy by changing the target enlarge
ment factor to be a smaller value.
45
Furthermore, the imaging apparatus 1 determines a target
enlargement factor on the basis of obtained parameters, and
calculates a time-based variation quantity of an enlargement
factor in order that the set enlargement factor may gradually
approach the target enlargement factor. The imaging appara
focus adjusting operation/optical zoom magni?cation setting
operation, respectively, by the user with the operating section
60, AE processing, judgment processing whether the shutter
button is depressed in the operating section 60 or not, and
a shake quantity and an optical zoom magni?cation as param
eters are, the smaller the value of a target enlargement factor
tus 1 can thus change the set enlargement factor overtime on
the basis of the calculated time-based variation quantity. That
is, the enlargement factor is not instantaneously changed
50
from a set enlargement factor to a target enlargement factor,
image recording processing into the memory section 12, the
but can gradually be changed. Consequently, no feeling of
storage section 90, and the like, when the shutter button is
wrongness is given to a user sighting the display section 80.
depressed (Step S114).
Furthermore, the imaging apparatus 1 is con?gured to
Then, the CPU 11 judges whether the imaging by the user
has ended or not on the basis of whether the mode of the
determine a target enlargement factor by the means of a shake
55
quantity of the imaging apparatus 1 detected by the shake
imaging apparatus 1 is switched to the reproducing mode by
quantity detecting section 50 as a camera shake quantity
the user with the operating section 60 or not (Step S115). If
the CPU 11 judges that the imaging does not end (Step S115:
No), the CPU 11 repeats the processing on and after Step
S102. On the other hand, if the CPU 11 judges that the
imaging has ended at Step S115 (Step S115: Yes), the CPU 11
together with an optical zoom magni?cation. That is, because
the target enlargement factor is determined on the basis of
both of the shake quantity and the optical zoom magni?ca
60
appropriate enlargement factor.
ends the present processing.
As described above, the imaging apparatus 1 of the present
embodiment can obtain the following effects by the execution
of the enlargement factor adjustment program by the CPU 11
tion, the set enlargement factor can be changed to a more
65
Furthermore, the imaging apparatus 1 is con?gured to
switch the focusing mode thereof between the manually
focusing mode and the automatic focusing mode with the
operating section 60, and performs the control of a display of
and by the cooperative operations of the respective sections
a focus adjusting con?rmation screen on the display section
including the CPU 11.
80 in the case of the switching to the manually focusing mode.
US 8,736,736 B2
11
12
That is, because the imaging apparatus 1 displays a focus
The enlargement factor adjustment program is a program
for enabling the CPU 11 to execute the function of changing
the enlargement factor at the time of displaying a part of an
image by enlarging the part at the time of the execution of the
enlargement display control program on the basis of the
de?ection quantity when the part of the image is displayed on
adjusting con?rmation screen only in the case of the switch
ing to the manually focusing mode, it can be prevented to
cause a user selecting the automatic focusing mode unneces
sary confusion.
Furthermore, the imaging apparatus 1 is con?gured to
the display section 80 by being enlarged.
allow a user to select whether to display the focus adjusting
To put it concretely, when a part of an image is displayed on
con?rmation screen 500 or not in the case of the switching to
the display section 80 by being enlarged as a focus adjusting
con?rmation screen by the execution of the enlargement dis
play control program, the CPU 11 executes the enlargement
factor adjustment program to compare the image displayed
the manually focusing mode with the operating section 60,
and performs the control of displaying the focus adjusting
con?rmation screen 500 in the case of the selection of the
display of the focus adjusting con?rmation screen 500. That
is, because the user can freely select whether to display the
on the focus adjusting con?rmation screen at the time of the
execution of the enlargement display control program and an
image based on the image frame preceding the aforesaid
image by one. Then, the CPU 11 calculates the de?ection
focus adjusting con?rmation screen 500 or not in the state of
the switching to the manually focusing mode, the conve
nience of the imaging apparatus 1 for the user is improved.
Furthermore, the imaging apparatus 1 can perform the
control for displaying the focus adjusting con?rmation screen
500 only in apart of the display screen of the display section
quantity (moved quantity) of the enlarged image. The CPU 11
then reads out the evaluation value table shown in FIG. 6A
from the memory section 1211 and extracts an evaluation value
20
corresponding to the obtained parameter (de?ection quantity)
80. That is, because a user can perform a focus adjustment in
from the evaluation table on the basis of the calculated de?ec
the part of the display screen and can parallely perform the
other operations such as the con?rmation of a subject in the
angle of view through the part of the display screen other than
the aforesaid part for the focus adjustment, the convenience of
tion quantity. Next, the CPU 11 reads out the evaluation value
correspondence table shown in FIG. 6B from the memory
section 1211 and determines whether to vary or keep the set
25
the imaging apparatus 1 is improved.
enlargement factor to the enlargement factor set at that point
of time according to the extracted evaluation value.
Furthermore, if the CPU 11 determines to vary the set
enlargement factor (for example, the case where the evalua
tion value in the evaluation value correspondence table shown
Embodiment 2
Next, an imaging apparatus 111 according to an embodi
30
Here, although the imaging apparatus 1 according to the
embodiment l is con?gured to determine a target enlarge
until a previously determined set time or the like has elapsed.
ment factor on the basis of a shake quantity and an optical
zoom magni?cation by using the shake quantity of the imag
ing apparatus 1 detected by the shake quantity detecting sec
in FIG. 6B is within the range of 1-4 or the range of 16 or
more), the CPU 11 performs the control of changing the
enlargement factor over time in accordance with the time
based increase/decrease quantity of the enlargement factor
ment 2 will be described with reference to FIGS. 5-7.
35
The time-based increase/decrease quantity of the enlarge
tion 50 as a camera shake quantity, the imaging apparatus 111
ment factor indicates a previously determined increase quan
tity or a decrease quantity of the enlargement factor per unit
is different from the imaging apparatus 1 of the embodiment
time in order that the set enlargement factor may gradually
l in the point of determining whether to vary or keep a set
enlargement factor on the basis of a de?ection quantity with
increase or decrease over time, and the time-based increase/
40
out determining the target enlargement factor by using the
de?ection quantity of an image enlarged by a set enlargement
enlarged image in the state in which apart of the image is
enlarged, the larger a position change of a subject in the
factor as a camera shake quantity.
In addition, the con?guration of the imaging apparatus la
similar to that of the imaging apparatus 1 of the embodiment
1 will be denoted by the mark same as that of the imaging
45
apparatus 1 in the following description, and the description
of the similar con?guration will be omitted.
As shown in FIG. 5, the imaging apparatus 111 is composed
of the control section 10, the imaging section 20, the image
decrease quantity is a constant value independent of the
evaluation value.
Here, the larger the value of the de?ection quantity of an
display screen of the display section 80 is, and the more
di?icult the focus adjustment of a user in the manually focus
ing mode becomes. Accordingly, the CPU 11 sets the set time
in such away that the larger the value of the de?ection quan
processing section 30, the driving section 40, the operating
tity (the evaluation value corresponding to the de?ection
quantity) of the enlarged image is, the smaller the value of the
enlargement factor after the change is (that is, the CPU 11 sets
section 60, the timer section 70, the display section 80, and
the set time to be shorter in the case of increasing the set time
the storage section 90.
and to be longer in the case of decreasing the set time).
50
A memory section 1211 of the control section 10 is com
posed of a buffer memory for temporarily storing the data to
be processed by the CPU 11 and the like, and a program
memory for storing the various programs and data pertaining
to the execution of the CPU 11. Then, there are an enlarge
ment display control program and an enlargement factor
adjustment program as the programs stored in the memory
section 1211, and there are an evaluation value table and an
55
imaging apparatus 111 according to the present embodiment
will be described with reference to the ?ow chart shown in
FIG. 7.
Because the processing at Steps S101-S107 and Steps
60
Next, the enlargement factor adjustment program stored in
the memory section 1211 will be described.
S114-S115 are the processing similar to those of the enlarge
ment factor adjusting processing of the embodiment 1 here,
the descriptions of those Steps will be omitted.
The CPU 11 executes the enlargement factor adjustment
program to obtain (calculate) the de?ection quantity of the
evaluation value correspondence table pertaining to the
execution of an enlargement factor adjustment program,
which will be described below, and the like, as the data stored
in the memory region 12.
(Enlargement Factor Adjusting Processing)
Next, the enlargement factor adjusting processing by the
65
image enlarged at Step S107 (Step S108a). Then, the CPU 11
extracts the evaluation value corresponding to the parameter
(de?ection quantity) obtained at Step S108a from the evalu
US 8,736,736 B2
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14
ation value table of the memory section 1211 (Step S109a).
The CPU 11 judges whether the extracted evaluation value is
within the keeping range (within the range of evaluation
values of 5-15 shown in FIG. 6B) in the evaluation value
correspondence table or not here (Step S110a), and if the
CPU 11 judges that the evaluation value is within the keeping
range (Step S110a: Yes), then the CPU 11 does not change the
enlargement factor but advances the processing to that at Step
In addition, the con?guration similar to those of the imag
ing apparatus 1 according to the embodiment l and the imag
ing apparatus 111 according to the embodiment 2 is denoted by
the same mark as those of the imaging apparatus 1 and 1a, and
the description thereof will be omitted in the following
description of the imaging apparatus 1b.
As shown in FIG. 8, the imaging apparatus 1b is composed
of the control section 10, the imaging section 20, the image
processing section 30, the driving section 40, the display
section 80, the timer section 70, the operating section 60, the
S114.
On the other hand, if the CPU 11 judges that the extracted
evaluation value is not within the keeping range at Step S1 1 011
(Step S110a: No), the CPU 11 sets a set time and performs the
time-based variation of the set enlargement factor according
storage section 90, and a high-frequency component detect
ing section 10019.
The high-frequency component detecting section 10019
obtains a sharpness on the basis of imaging processing for
to the time-based increase/decrease quantity (Step S111a).
detecting high-frequency components of an image generated
by the imaging section 20. To put it concretely, the high
Then, the CPU 11 judges whether the set time has elapsed or
not on the basis of a signal pertaining to the time, which signal
is output from the timer section 70 (Step S112a). If the CPU
11 judges that the set time has not elapsed (Step S112a: No),
the CPU 11 repeats the processing on and after Step S111a.
On the other hand, if the CPU 11 judges that the set time has
elapsed (Step S112a: Yes), the CPU 11 advances the process
ing to that at Step S114.
As described above, according to the imaging apparatus 111
of the present embodiment, it is needless to say that the effects
similar to those of the imaging apparatus 1 of the embodiment
frequency component detecting section 100!) performs a two
dimensional Fourier transform to a generated image to con
vert the image into a function of a frequency region. Then, the
20
the rate of the components of a predetermined frequency or
more among all of the frequency components by, for example,
performing the processing of calculating the product of the
25
A memory section 12b of the control section 10 is com
the enlargement factor adjustment program, the CPU 11
30
to the execution of the CPU 11. Then, there are an enlarge
adjustment program as the programs stored in the memory
section 12b, and there are an evaluation value table and an
is needless to calculate any target enlargement factors, and the
35
be expected in comparison with the imaging apparatus 1.
Furthermore, because the imaging apparatus 111 deter
mines whether to vary or keep the set enlargement factor by
using the de?ection quantity of an image calculated at the
time of the execution of the enlargement factor adjustment
evaluation value correspondence table pertaining to the
execution of an enlargement factor adjustment program,
which will be described below, and the like, as the data stored
in the memory region 12b.
Next, the enlargement factor adjustment program stored in
40
program by the CPU 11 as a camera shake quantity, the
con?guration for detecting a shake quantity of the imaging
apparatus 111 with a sensor or the like for shake quantity
detection is not needed. Consequently, the reduction of the
manufacturing cost of the imaging apparatus 111 can be
achieved.
posed of a buffer memory for temporarily storing the data to
be processed by the CPU 11, and the like, and a program
memory for storing the various programs and data pertaining
ment display control program and an enlargement factor
decrease quantity of the enlargement factor. Consequently, it
reduction of the processing load of the control section 10 can
converted function and a ?lter function of a high-pass ?lter,
and outputs the calculation result to the control section 10 as
the sharpness.
1 can be obtained. Furthermore, when the CPU 11 executes
determines whether to vary or keep the set enlargement factor
to the enlargement factor set at that point of time on the basis
of the obtained parameter, and varies the set enlargement
factor over time on the basis of the time-based increase/
high-frequency component detecting section 10019 calculates
45
the memory section 12b will be described.
The enlargement factor adjustment program is a program
for enabling the CPU 11 to execute the function of changing
the enlargement factor at the time of displaying a part of an
image by enlarging the part at the time of the execution of the
enlargement display control program on the basis of a sharp
ness output from the high-frequency component detecting
section 10019.
To put it concretely, when a part of an image is displayed by
being enlarged as a focus adjusting con?rmation screen by the
Embodiment 3
Although the imaging apparatus 111 according to the
execution of the enlargement display control program, the
CPU 11 obtains a sharpness output from the high-frequency
component detecting section 1001). Then, the CPU 11 reads
embodiment 2 is con?gured to determine whether to vary or
keep a set enlargement factor to the enlargement factor set at
out the evaluation value table from the memory section 12b
and extracts an evaluation value corresponding to the
Next, an imaging apparatus 1b according to an embodi
50
ment 3 will be described with reference to FIGS. 8-9.
that point of time on the basis of a de?ection quantity by using
55
the de?ection quantity of an enlarged image as a camera
shake quantity without determining a target enlargement fac
tor here, the imaging apparatus 1b according to the embodi
sense of sight of a user as a sharp image) of a subject, here, the
smaller a value of the sharpness is, the larger an assigned
evaluation value is, adversely to the evaluation table of the
de?ection quantities shown in FIG. 6A.
Next, the CPU 11 reads out the evaluation value correspon
ment 3 obtains a sharpness on the basis of the imaging pro
cessing detecting the high-frequency components of an
image generated by the imaging section 20. The imaging
apparatus 1b is different from the imaging apparatus 111 in the
point of being con?gured to determine whether to vary or
keep a set enlargement factor on the basis of a sharpness by
using the sharpness as a parameter similar to the aforesaid
camera shake quantity without determining any target
enlargement factors.
obtained parameter (sharpness) from the evaluation table.
Because the sharpness expresses the degree of a focus adjust
ment (the degree of a sharpness of an image grasped by the
dence table same as that of FIG. 6B from the memory section
65
12b, and determines whether to vary or keep the set enlarge
ment factor according to the extracted evaluation value.
Furthermore, if the CPU 11 determines to vary the set
enlargement factor (for example, the case where the evalua
US 8,736,736 B2
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16
tion value in the evaluation value correspondence table shown
forms a focus adjustment by using the image from the high
in FIG. 6B is within the range of 1-4 or the range of 16 or
frequency component detecting section 1001) (Step S108b).
more), the CPU 11 performs the processing of changing the
Then, the CPU 11 performs the processing on and after Step
enlargement factor over time in accordance with the time
S109a on the basis of the sharpness obtained at Step S108b.
based increase/decrease quantity of the enlargement factor
(an increase quantity or a decrease quantity of the enlarge
As described above, according to the imaging apparatus 1b
of the present embodiment, it is needless to say that the effects
similar to those of the imaging apparatus 111 of the embodi
ment factor per unit time determined in advance in order that
the set enlargement factor may gradually increase or decrease
ment 2 can be obtained. Furthermore, when the CPU 11
over time) until a previously determined set time or the like
executes the enlargement factor adjustment program and
has elapsed.
determines whether to vary or keep the set enlargement factor
on the basis of the obtained parameter, it is necessary to
Here, the smaller the value of the sharpness of an enlarged
image is in the state in which a part of the image is enlarged,
calculate the de?ection quantity of the image enlarged by the
the more an unfocused state of the subject in the display
screen of the display section 80 is regarded by a user, and the
set enlargement factor as a parameter in the embodiment 2.
However, it is only necessary to input a sharpness output from
larger the dif?culty of the focus adjustment of the user in the
the high-frequency component detecting section 10019 as a
manually focusing mode becomes.
Accordingly, the CPU 11 sets the set time in such a way that
parameter in the imaging apparatus 1b, and consequently the
the smaller the value of the sharpness is, the smaller the value
of the enlargement factor after a change is.
reduction of the processing load of the control section 10 can
be achieved.
In addition, the embodiments described above are only
(Modi?cation)
20
examples of the suitable image forming apparatus according
A display of enlarging apart of an image is performed in the
aforesaid embodiments in order to improve the operability in
to the present invention, and the scope of the present invention
the case where a user performs a focus adjustment by a
is not limited to those embodiments.
manual operation at the time of manually focusing mode.
That is, only in the case of judging that the user has changed
the focusing mode to the manually focusing mode at Step
S102, the processing from Step S104 to Step S113 is made to
25
be performed.
Apart of an image may, however, be displayed by being
enlarged in order to improve the visibility when a user con
30
?rms the focus adjustment state in automatic focusing at the
time of the automatic focusing mode not only at the time of
the manually focusing mode.
In this case, a part of the aforesaid embodiment is modi?ed
as follows.
35
That is, if the CPU 11 judges that the focusing mode is
changed to the automatic focusing mode at Step S102, the
CPU 11 performs the processing similar to that from Step
the embodiments described above can suitably be changed
without departing from the subject matter of the present
invention.
For example, it is needless to say that the high-frequency
component detecting section 10019 of the embodiment 3 is
provided to the imaging apparatus 1 according to the embodi
ment 1 and the imaging apparatus 1a of the embodiment 2,
and that, when the CPU 11 executes the enlargement factor
adjustment program, the CPU 11 may use a sharpness output
from the high-frequency component detecting section 1001)
together with a camera shake quantity and an optical zoom
magni?cation as the parameters for determining an evalua
tion value (in this case, the larger the value of the sharpness is,
S104 to Step S113.
In the automatic focusing mode, however, the following
processing pertaining to the automatic focusing is executed in
Furthermore, the minute con?guration and the minute
operation of each section of the image forming apparatus of
40
the smaller the evaluation value to be determined becomes).
Thereby, because the CPU 11 results in determining the
evaluation value compositively by means of a plurality of
the series of the pieces of the processing from Step S104 to
parameters, a more appropriate evaluation value can be deter
Step S113.
mined.
After the execution of the processing at Step S1 04, the CPU
11 displays an AF frame showing a subject region, which is
the object of the automatic focusing, and executes the auto
matic focusing processing by a contrast system by using a
subject in this AF frame as the object.
Then, at the time of the enlargement display at Step S107,
the CPU 11 enlarges the image in the AF frame to display the
Furthermore, although the embodiments 1-3 are con?g
45
50
enlarged image.
ured to repeat the enlargement factor adjusting processing by
the imaging apparatus 1-11) at the timing of the imaging of a
subject by the imaging section 20 to adjust an enlargement
factor as shown at Steps S104-S115 ofFIGS. 4, 7, and 9, it is
needless to say that the embodiments 1-3 may be con?gured
to repeat the enlargement factor adjusting processing at the
timing when the time timed by the timer section 70 reaches a
By such processing, it becomes possible for a user to easily
con?rm the focus state of the subject portion, which is the
predetermined time to perform the adjustment.
object of the automatic focusing.
imaging apparatus equipped with an imaging section to gen
(Enlargement Factor Adjusting Processing)
Next, the enlargement factor adjusting processing by the
According to a ?st aspect of the present invention, an
55
erate images by imaging a subject, comprises:
a display section to sequentially display each of the images
imaging apparatus 1b according to the present embodiment
generated by the imaging section;
will be described with reference to the ?ow chart shown in
FIG. 9.
Because the processing other than that at Step S108!) is the
play parts of the images generated by the imaging section on
the display section while enlarging the parts by a predeter
an enlargement display control section to sequentially dis
60
mined enlargement factor;
processing similar to those of the enlargement factor adjust
ing processing of the embodiment 2 here, the descriptions of
those Steps will be omitted.
a detecting section to detect a shake quantity of the imaging
apparatus; and
an enlargement factor control section to change the
When a part of an image is enlarged to be displayed on the
display section 80 after the execution of the processing until
Step S107, the CPU 11 executes the enlargement factor
adjustment program to obtain a sharpness when a user per
65
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the shake quantity
detected by the detecting section.
US 8,736,736 B2
17
18
Preferably, the enlargement factor control section changes
Preferably, the enlargement factor control section deter
the enlargement factor at the time of the enlargement by the
enlargement display control section according to the shake
quantity detected by the detecting section in such a way that
the enlargement factor becomes smaller as the shake quantity
mines whether to vary or keep the enlargement factor when
the enlargement display control section enlarges the parts of
the images to display the enlarged images to an enlargement
becomes larger.
Preferably, the imaging apparatus further comprises an
detected by the detecting section; and
optical zoom section to set an optical zoom magni?cation to
the enlargement factor, the enlargement factor control section
changes the enlargement factor at the time of the enlargement
factor set at that point of time based on the shake quantity
if the enlargement factor control section determines to vary
an arbitrary magni?cation, wherein
the display section displays each of the images generated
by the imaging section according to the optical zoom magni
by the enlargement display control section based on a time
based increase/decrease quantity of the predetermined
?cation set by the optical zoom section; and
enlargement factor over time.
the enlargement display control section displays the parts
of the images generated by the imaging section according to
Preferably, the enlargement factor control section changes
enlargement factor at the time of the enlargement by the
enlargement display control section according to a combina
tion of the shake quantity detected by the detecting section
the optical zoom magni?cation set by the optical zoom sec
tion on the display section while further enlarging the parts by
the predetermined enlargement factor.
Preferably, the enlargement display control section starts
enlargement displays in conformity with an instruction
operation by a user while each of the images generated by the
imaging section are being displayed on the display section.
and an optical zoom magni?cation set by an optical zoom
section.
20
Preferably, the enlargement display control section
jected to a live view display, and can easily perform the focus
adjustment.
switches an image displayed on the display section from an
image before enlargement to an image after the enlargement
in conformity with an instruction operation by the user.
That is, the imaging apparatus can perform a focus adjust
ment by a manual operation on the basis of an image sub
25
Furthermore, according to a second aspect of the present
invention, an imaging apparatus equipped with an imaging
Preferably, the enlargement display control section dis
plays an image after enlargement by synthesizing the image
section to generate images by imaging a subject, comprises:
with a part of an image before the enlargement.
tion to an arbitrary magni?cation;
a display section to sequentially display each of the images
an optical zoom section to set an optical zoom magni?ca
Preferably, the imaging apparatus further comprises:
a focus adjusting section to perform a focus adjustment by
a manual operation; and
a frame display controlling section to display a frame
showing an object region of enlargement on the display sec
tion, wherein
the enlargement display control section sequentially dis
plays images in the frame displayed by the frame display
controlling section on the display section while enlarging the
30
zoom magni?cation set by the optical zoom section;
an enlargement display control section to sequentially dis
play parts of the images generated by the imaging section
according to the optical zoom magni?cation set by the optical
35
an enlargement factor control section to change the
Preferably, the imaging apparatus further comprises a
matically, wherein
the enlargement display control section sequentially dis
plays the images of a subject portion on the display section,
the images being objects of the automatic focus adjustment
by the focus adjusting section, while enlarging the images by
the predetermined enlargement factor.
Preferably the imaging apparatus further comprises:
a frame display controlling section to display a frame
showing a subject region of an object of the automatic focus
adjustment by the focus adjusting section on the display sec
40
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the optical zoom
magni?cation set by the optical zoom section.
Preferably, the enlargement factor control section changes
the enlargement factor of the enlargement display control
section according to the optical zoom magni?cation set by the
45
optical zoom section in such a way that the enlargement factor
becomes smaller as the optical zoom magni?cation becomes
larger.
That is, the imaging apparatus can perform a focus adjust
ment by a manual operation on the basis of an image sub
jected to a live view display, and can easily perform the focus
50
tion, wherein
the enlargement display control section sequentially dis
plays images in the frame displayed by the frame display
controlling section on the display section while enlarging the
images by the predetermined enlargement factor.
zoom section on the display section while further enlarging
the parts by a predetermined enlargement factor; and
images by the predetermined enlargement factor.
focus adjusting section to perform a focus adjustment auto
generated by the imaging section according to the optical
adjustment.
Furthermore according to a third aspect of the present
invention, a recording medium records a control program of
an imaging apparatus including an imaging section to gener
ate images by imaging a subject, a display section to sequen
55
tially display each of the images generated by the imaging
Preferably, the enlargement factor control section deter
section, and a detecting section to detect a shake quantity of
mines a target value of the enlargement factor after a change
based on a shake quantity detected by the detecting section;
the enlargement display control section calculates a time
the imaging apparatus, the recording medium recording a
program enabling a computer of the imaging apparatus to
based variation quantity of the enlargement factor in order
that the enlargement factor at the time of enlarging the parts of
the images to display them may gradually approach the deter
mined target value; and
the enlargement factor control section changes the enlarge
ment factor at the time of the enlargement by the enlargement
display control section based on the calculated time-based
variation quantity over time.
function as
60
an enlargement display control section to sequentially dis
play parts of the images generated by the imaging section on
the display section while enlarging the parts by a predeter
mined enlargement factor; and
an enlargement factor control section to change the
65
enlargement factor at a time of enlargement by the enlarge
ment display control section according to the shake quantity
detected by the detecting section.
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