Adjusting Brightness and Contrast. Canon CanoScan LiDE120, CanoScan LiDE 120, CanoScan LiDE220, CanoScan LiDE 220, LIDE120
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Adjusting Brightness and Contrast
You can adjust images that are too dark or bright, or too flat due to lack of contrast by using
(Brightness/Contrast) in ScanGear's Advanced Mode tab.
Note
• Click (Down arrow) to switch to detailed view. Click (Up arrow) to return to the previous view.
• Click Defaults to reset all adjustments in the current window.
Channel
Each dot of an image is a mixture of Red, Green, and Blue in various proportions (gradation). These colors can be adjusted individually as a "channel."
Master
Adjust the Red, Green, and Blue combined.
Red
Adjust the Red channel.
Green
Adjust the Green channel.
Blue
Adjust the Blue channel.
Note
• Only Grayscale will be displayed in Channel when Color Mode is Grayscale.
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Brightness
Adjust the image brightness.
Move (Slider) under Brightness to the left to darken and right to brighten the image. You can also enter a value (-127 to 127).
Darkened Original image Brightened
Note
• Highlights may be lost if you brighten the image too much, and shadows may be lost if you darken the image too much.
Contrast
"Contrast" is the degree of difference between the brighter and darker parts of an image. Increasing contrast will increase the difference, thus sharpening the image. Decreasing contrast will decrease the difference, thus softening the image.
Move (Slider) under Contrast to the left to decrease and right to increase the contrast of the image.
You can also enter a value (-127 to 127).
Decreased contrast Original image Increased contrast
Note
• Increasing the contrast is effective in adding a three-dimensional feel to soft images. However, shadows and highlights may be lost if you increase the contrast too much.
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Key Features
- Scanner type: Flatbed scanner 2400 x 4800 DPI
- Colour scanning
- A4
- Maximum scan size: 215.9 x 297.18 mm Sensor type: CIS
- USB port
- 2.5 W
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Table of contents
- 6 Read Me First
- 7 Symbols Used in This Document
- 8 Trademarks and Licenses
- 12 Search Tips
- 14 Notes on Operation Explanations
- 15 Useful Functions Available on the Machine
- 16 View Photos Easily Using My Image Garden
- 18 Connection Methods Available on the Machine
- 19 Overview of the Machine
- 20 Safety Guide
- 21 Safety Precautions
- 22 Regulatory and Safety Information
- 25 Main Components
- 27 Placing Items
- 28 Place the Item on the Platen
- 29 Items You Can Place & How to Place Items
- 31 Maintenance
- 32 Precautions for Safe Transport of the Machine
- 33 Legal Limitations on Use of Your Product and Use of Images
- 34 Specifications
- 36 Scanning
- 37 Scanning from a Computer
- 38 Scanning with IJ Scan Utility
- 39 What Is IJ Scan Utility (Scanner Software)?
- 41 Starting IJ Scan Utility
- 42 Easy Scanning with Auto Scan
- 43 Scanning Documents
- 44 Scanning Photos
- 45 Scanning with Favorite Settings
- 46 Scanning Items Larger than the Platen (Image Stitch)
- 50 Scanning Multiple Items at One Time
- 53 Saving after Checking Scan Results
- 56 Sending Scanned Images via E-mail
- 59 Extracting Text from Scanned Images (OCR)
- 62 IJ Scan Utility Screens
- 63 IJ Scan Utility Main Screen
- 65 Settings Dialog
- 111 Save Settings Dialog
- 114 Image Stitch Window
- 118 Scanning with ScanGear
- 119 What Is ScanGear?
- 121 Scanning with Advanced Settings Using ScanGear
- 122 Starting ScanGear
- 123 Scanning in Basic Mode
- 125 Scanning in Advanced Mode
- 127 Scanning Multiple Documents at One Time with ScanGear
- 131 Correcting Images and Adjusting Colors with ScanGear
- 136 Adjusting Colors Using a Color Pattern
- 138 Adjusting Saturation and Color Balance
- 140 Adjusting Brightness and Contrast
- 142 Adjusting Histogram
- 146 Adjusting Tone Curve
- 149 Setting Threshold
- 150 ScanGear Screens
- 151 Basic Mode Tab
- 158 Advanced Mode Tab
- 164 Input Settings
- 166 Output Settings
- 169 Image Settings
- 174 Color Adjustment Buttons
- 177 Preferences Dialog
- 178 Scanner Tab
- 179 Preview Tab
- 181 Scan Tab
- 182 Color Settings Tab
- 184 Save Settings Tab
- 185 Placing Items (When Scanning from a Computer)
- 187 Adjusting Cropping Frames (ScanGear)
- 191 General Notes (ScanGear)
- 235 Scan Quality (Image Displayed on the Monitor) Is Poor
- 236 Scanned Image Is Surrounded by Extra White Areas
- 237 Cannot Scan at the Correct Size
- 238 Item Is Placed Correctly, but the Scanned Image Is Slanted
- 239 Scanned Image Is Enlarged (Reduced) on the Computer Monitor
- 240 Problems with Installation/Downloading
- 241 Cannot Install the Scanner Driver
- 242 Installation Is Unsuccessful (Insufficient Free Hard Disk Space)
- 243 Installation Is Unsuccessful (Insufficient Memory)
- 244 About Inkjet Printer/Scanner/Fax Extended Survey Program