Canon printer PIXMA MX490 User Manual

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
•
Color adjustments are applied only to the cropping frames (scan areas) or the frame selected in
thumbnail view.
•
You can select multiple frames or cropping frames by clicking them while pressing the Ctrl key.
•
You can also select a color tone from the color pattern displayed on the left of the  Color Pattern
screen.
•
You can also use this...

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
•
Click Defaults  to reset all adjustments in the current window.
Saturation Adjust the image's saturation (vividness). You can brighten colors that have faded with time, etc.
Move 
 (Slider) under  Saturation to the left to decrease the saturation (darken the image), and to the
right to increase...

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,...

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
•
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...

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).
DarkenedOriginal imageBrightened
Note
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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...

Adjusting HistogramYou can adjust the image color tone by using a graph (histogram) showing brightness distribution, via 
(Histogram) in ScanGear (scanner driver)'s  Advanced Mode tab.
Note
•
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....

(1) Bright area(2) Dark area(3) Whole imageMore data is distributed to thehighlight side.More data is distributed to the shadow side.Data is widely distributed between thehighlight and shadow.
Adjusting Histograms (Using the Slider)
Select a  Channel , then move 
 (Black-point Slider) or  (White-point Slider) to specify the level to be
set as the shadow or highlight.
•
All parts to the left of  (Black-point Slider) will be black (level 0).
•
The parts at  (Mid-point Slider) will turn to the color exactly...

Moving the Mid-point SliderMove the Mid-point Slider to specify the level to be set as the middle of the tonal range.
Images with more data distributed to the highlight side
Move the Mid-point Slider toward the highlight side.
Images with more data distributed to the shadow side
Move the Mid-point Slider toward the shadow side.
Adjusting Histograms (Using the Droppers)
When you select a  Channel and click the Black-point, Mid-point, or White-point Dropper, the mouse
pointer on the preview image changes...

•The point clicked with  (White-point Dropper) will be the brightest point. You can also enter a
value (10 to 255).•
Click  (Dropper) for  Gray Balance  and click the area you want to adjust the color in the preview
image.
The clicked point will be set as the achromatic color reference, and the rest of the image is adjusted
accordingly. For instance, if snow in a photo appears bluish, click the bluish part to adjust the whole image and reproduce natural colors.
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Adjusting Tone CurveYou can adjust the brightness of an image by selecting the type of graph (tone curve) showing the balance
of tone input and output, via 
 (Tone Curve Settings) in ScanGear (scanner driver)'s  Advanced Mode
tab.
Note
•
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...