Canon Pixma Mp540 User Guide

							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Correcting Images (Unsharp Mask, Reduce Dust and Scratches, Fading Correction, etc.)
Correcting Images (Unsharp Mask, Reduce Dust and
Scratches, Fading Correction, etc.)
The Image Settings functions in Advanced Mode 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  of a function and select an item from the pull-down menu.
Important
Do not apply these functions to images without moire, dust/scratches or faded colors. The color
tone may be adversely affected.
See the section below for details and precautions on each function.
Image Settings
Note
See the section below to start ScanGear (scanner driver) in Advanced Mode and scan.
Scanning in Advanced Mode
Adjusting the image brightness and color tone
Set Auto Tone to ON.
OFFON
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							Sharpening slightly out-of-focus images
Set Unsharp Mask to ON.
OFFON
Reducing gradations and stripe patterns
Set Descreen to ON.
OFFON
Note
Moire is an uneven gradation or stripe pattern that appears in parts of a scanned image where the
dots have interfered with each other. Descreen is the function for reducing this moire effect.
Reducing dust and scratches
Set Reduce Dust and Scratches to Low, Medium or High according to the degree of dust and scratches.
NoneMedium
Correcting photos that have faded with time or due to colorcast
Set Fading Correction to Low, Medium or High according to the degree of fading or colorcast.
NoneMedium
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							Reducing graininess
Set Grain Correction to Low, Medium or High according to the degree of graininess.
NoneMedium
Correcting backlit images
Set Backlight Correction to Low, Medium or High according to the degree of backlight.
NoneMedium
Correcting shadows that appear between pages when scanning open booklets
Set Gutter Shadow Correction to Low, Medium or High according to the degree of shadows.
NoneMedium
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Colors Using a Color Pattern
Adjusting Colors Using a Color Pattern
You can preview color changes and reproduce natural colors by using the Color Pattern function in
ScanGears Basic Mode.
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 so
that 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
Color adjustments are applied only to the scan area (cropping frame) specified in the Preview area.
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 function to add a specific tint to an image. Increase the magenta to add a
warm tint, and increase the blue to add a cool tint.
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Saturation and Color Balance
Adjusting Saturation and Color Balance
In ScanGears Advanced Mode, click  (Saturation/Color Balance).
Saturation
Adjust the images saturation (vividness). You can brighten colors that have faded with time, etc.
Move  (slider) under Saturation to the left to reduce the saturation (darken the image), and to the right
to increase the saturation (brighten the image). You can also enter a value (-127 to 127).
Saturation decreasedOriginal imageSaturation increased
Note
The natural color tone of the original image may be lost if you increase saturation too much.
Color Balance
Adjust images that have a colorcast. Colorcast is a phenomenon where a specific color affects the entire
picture due to the weather or ambient strong colors.
Move  (slider) under each color pair 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.
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							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
Note
Click Defaults to reset all adjustments in the current window.
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Brightness and Contrast
Adjusting Brightness and Contrast
In ScanGears Advanced Mode, click  (Brightness/Contrast).
Note
Click  to switch to detailed view. Click  to return to the previous view.
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.
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).
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							DarkenedOriginal imageBrightened
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 contrastOriginal imageIncreased 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.
Note
Click Defaults to reset all adjustments in the current window.
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Histogram
Adjusting Histogram
In ScanGears Advanced Mode, click  (Histogram).
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.
Reading Histograms
You can open Histogram of a specified area for each Channel. The higher the Histogram peak, the more
data is distributed to that level.
(1) Bright area(2) Dark area(3) Whole image
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