Canon printer PIXMA MG6820 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 721
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 723
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. 726
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 729
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