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Canon printer PIXMA MG6821 User Manual

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    							Correcting Images and Adjusting Colors with ScanGear (Scanner
    Driver)
    Correcting Images (Unsharp Mask, Reduce Dust and Scratches, Fading
    Correction, etc.)
    Adjusting Colors Using a Color Pattern
    Adjusting Saturation and Color Balance
    Adjusting Brightness and Contrast
    Adjusting Histogram
    Adjusting Tone Curve
    Setting Threshold
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    							Correcting Images (Unsharp Mask, Reduce Dust and Scratches,Fading Correction, etc.)
    The  Image Settings  functions on the  Advanced Mode  tab of ScanGear (scanner driver) allow you to
    enhance the outline of the subjects, reduce dust/scratches, and correct faded colors when scanning images.
    Setting Items
    Click 
     (Arrow) of a function and select an item from the pull-down menu.
    Important
    
    						
    							Reducing show-through in text documents or lightening the base color inrecycled paper, newspapers, etc. when scanning documents
    Set  Reduce Show-through  to ON .
    OFFON
    Sharpening slightly out-of-focus images
    Set  Unsharp Mask  to ON .
    OFFON
    Reducing gradations and stripe patterns
    Set  Descreen  to ON .
    OFFON
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    							725 
    						
    							Adjusting Colors Using a Color PatternYou can preview color changes and reproduce natural colors by using the color pattern function in
    ScanGear (scanner driver)'s  Basic Mode tab.
    Color Adjustment
    Correct colors that have faded with time or due to colorcast. "Colorcast" is a phenomenon where a
    specific color affects the entire picture due to the weather or ambient strong colors.
    Click an arrow in  Color Adjustment  to emphasize the corresponding color.
    Cyan & red, magenta & green, and yellow & blue are complementary color pairs (each pair produces a
    shade of gray when mixed). You can reproduce the natural colors of the scene by reducing the cast color and increasing the complementary color.
    It is recommended that you find a portion in the image where it should be white, and adjust the colors sothat the portion turns white.
    Preview image appears in the center. Preview image colors change as you adjust them.
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    							Below is an example of correcting a bluish image.
    Since  Blue and  Green  are too strong, click the  Yellow and Magenta  arrows to correct.
    BeforeAfter
    Note
    
    						
    							Adjusting Saturation and Color BalanceYou can brighten colors that have faded with time or due to colorcast by using 
     (Saturation/Color
    Balance) in ScanGear (scanner driver)'s  Advanced Mode tab.
    Note
    
    						
    							Move  (Slider) under Color Balance  to the left or right to emphasize the corresponding color.
    Cyan & Red
    Magenta & Green
    Yellow & Blue
    These are complementary color pairs (each pair produces a shade of gray when mixed). You can reproduce the natural colors of the scene by reducing the cast color and increasing the complementary color.
    It is usually difficult to correct the image completely by adjusting only one color pair. It is recommended
    that you find a portion in the image where it should be white, and adjust all three color pairs so that the
    portion turns white.
    You can also enter a value (-127 to 127). Below is an example of an image in which the "Cyan & Red" pair has been adjusted.Cyan is increasedRed is increased
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    							Adjusting Brightness and ContrastYou can adjust images that are too dark or bright, or too flat due to lack of contrast by using 
    (Brightness/Contrast) in ScanGear (scanner driver)'s  Advanced Mode tab.
    Note
    
    						
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