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Chapter 5
Image Capture
Image Capture
How to Capture an Image
There are two methods of capturing images as discussed below:
•
Image Capture to a microSD Card by Scanning a Special Label
•
Image Capture to the Host by Host Command
Image Capture to a microSD Card by Scanning a Special Label
Insert a micro SD card into the scanner, scan a capture label and place the item to be captured in front of the scanner. Press and release the Camera Button. The image will be written to the micro SD card five seconds after button release.
The format, size, contrast, brightness and compression use the configured values.
This Capture label is as follows:
<FNC3>IMAGEFAUTO<CR>
The Capture label will not read unless a microSD card is inserted.
NOTE
The image filename is automatically increased from image000 to image999.
The date image file generated is not actual, since no real time clock is embedded in the scanner.
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Product Reference Guide
Image Capture
Image Capture to the Host by Host Command
This feature is only available for RS-232 and USB COM interfaces.
If the USB COM interface has been selected, follow the
instructions in the
chapter of this guide.
NOTE
The host command format is as follows:
P<cnt>pSBC where:
P - ASCII 'P' used as preamble of pass-through commands
<cnt> - binary value of 4 indicating 4 bytes to follow p - ASCII lowercase 'p' ; command to take a picture
S - size value of image as ASCII character
‘S’ == uses scanner's configuration value
‘0’-VGA, (640X480)
‘1’-WVGA, (752X480)
‘2’-SXGA, (1280x1027)
‘3’-CIF (320x240)
B - brightness value in ASCII
‘B’ == uses scanner's configuration value CI_IMAGE_BRIGHTNESS else ‘0’ thru’9’ specifies brightness
C - contrast value in ASCII
‘C’ == uses scanner configuration value CI_IMAGE_CONTRAST else ‘0’ thru’9’ specifies contrast
IF the image is of a type the scanner supports, capture and transmission occurs, and the command is of proper format
THEN
The scanner will transmit an ACK (0x06) to the Host in response to this command.
The image data transmission starts with a 4 byte binary field representing (Big Endian) number of bytes to follow.
If the “number of bytes to follow” value is zero, there was a problem with generating the image and the request should be retried.
ELSE
The scanner will transmit a BEL (0x07) to the Host in response to this command.
ENDIF
32
Magellan TM 3200VSi
Image Compression
Image Compression
Specifies the starting image compression factor for JPEG images. A higher number specifies a higher quality image with less compression than a relative lower number for the same image.
A value of 100 means minimal compression. A value of 1 means maximum compression at a loss of quality. Follow these steps to program this feature:
1. Scan the START bar code.
2. Scan the Set Image Compression bar code.
3. Turn to
and scan the two digits (zero-padded) representing the desired compression. The configurable range is 01-0x64 by increments of 01.
4. Scan the END bar code.
START / END
PROGRAMMING bar codes
Set Image Compression
DEFAULT SETTING IS
100 (minimal compression — higher quality)
Image Format
Specifies the format of the captured image
START / END
PROGRAMMING bar codes
Image Format = JPG
DEFAULT
Image Format = BMP
Product Reference Guide
33
Image Capture
Image Size
Specifies the size of the image capture. Choices are:
• VGA
• WVGA
• SXGA, Full Size
• CIF
START / END
PROGRAMMING bar codes
Image Size = VGA
DEFAULT
Image Size = WVGA
Image Size = SXGA, Full Size
Image Size = CIF
34
Magellan TM 3200VSi
Image Brightness
Image Brightness
This feature sets the image brightness value. Follow these instructions to configure this feature:
1. Scan the START bar code.
2. Scan the Set Image Brightness bar code.
3. Turn to
and scan the two digits (zero-padded) representing the desired brightness in decimal notation. The configurable range is 01-0x0A by increments of 01.
4. Scan the END bar code.
START / END
PROGRAMMING bar codes
Set Image Brightness
DEFAULT SETTING FOR THIS FEATURE: 09
Image Contrast
This feature sets the image contrast value. Follow these instructions to configure this feature:
1. Scan the START bar code.
2. Scan the Set Image Contrast bar code.
3. Turn to
and scan the two digits (zero-padded) representing the desired contrast in decimal notation. The configurable range is 01-0x0A by increments of 01.
4. Scan the END bar code.
START / END
PROGRAMMING bar codes
Set Image Contrast
DEFAULT SETTING FOR THIS FEATURE: 09
Product Reference Guide
35
Image Capture
NOTES
36
Magellan TM 3200VSi
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