Canon Pixma Mp540 User Guide

More data is distributed to the
highlight side.
More data is distributed to the
shadow side.
Data is widely distributed between the
highlight 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 between the black-point and white-point....

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 to a dropper. Click a Dropper displayed below the histogram to
change the setting.
- The point clicked with  (Black-point Dropper) will be the darkest point. You can also enter...

Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Tone Curve
Adjusting Tone Curve
In ScanGears Advanced Mode, click  (Tone Curve Settings).
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....

Adjusting Tone Curve
In Select Tone Curve, select a tone curve from No correction, Overexposure, Underexposure, High
contrast, Reverse the negative/positive image and Edit custom curve.
No correction (No adjustment)
Overexposure (Convex curve)
The midtone data of the input side is stretched toward the highlight of the output side, resulting in a
bright-toned image when viewed on a monitor.
Underexposure (Convex curve)
The midtone data of the input side is stretched toward the shadow of the output side,...

Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Setting Threshold
Setting Threshold
The brightness of color and grayscale images is expressed in a value between 0 and 255. However, in
creating black and white images, all colors are mapped to either black (0) or white (255). Threshold is
the borderline value that determines a color as black or white. By adjusting the threshold level, you can
sharpen text in a...

Advanced Guide > Scanning > Scanning with Other Application Software > ScanGear (Scanner Driver) Screens
ScanGear (Scanner Driver) Screens
The following sections describe ScanGears screens and functions, and how to use ScanGear (scanner
driver).
Basic Mode Tab
Advanced Mode Tab
Input Settings
Output Settings
Image Settings
Color Adjustment Buttons
Auto Scan Mode Tab
Preferences Dialog Box
Scanner Tab
Preview Tab
Scan Tab
Color Settings Tab
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Advanced Guide > Scanning > Scanning with Other Application Software > ScanGear (Scanner Driver) Screens >
Basic Mode Tab
Basic Mode Tab
This mode allows you to scan easily by following the on-screen steps.
This section describes the settings and functions available in Basic Mode.
The displayed items vary by document type and how the screen was opened.
(1) Settings and Operation Buttons
(2) Toolbar
(3) Preview Area
Settings and Operation Buttons
Select Source
Photo(Color)
Scan color photos....

Note
If you scan without preview, colors are adjusted based on the document type selected in Select
Source.
When using the machine for the first time, scanner calibration starts automatically. Wait a while
until the preview image appears.
Destination
Select what you want to do with the scanned image.
Print (300 dpi)
Select this to print the scanned image on a printer.
Image display (150 dpi)
Select this to view the scanned image on a monitor.
OCR (300 dpi)
Select this to use the scanned image with OCR...

In the Add/Delete the Output Size dialog box, you can specify multiple output sizes and save
them at one time. Saved items appear in the Output Size list along with the predefined items.
Add
To add a size, enter Output Size Name, Width and Height, then click Add. For Unit, you can
select mm or inches when Destination is Print (300 dpi) but you can only select pixels when
Destination is Image display (150 dpi). The name of the added size appears in Output Size List.
Click Save to save the items listed in...

Backlight correction
Corrects photos that have been shot against light.
Gutter shadow correction
Corrects shadows that appear between pages when scanning open booklets.
Important
For precautions on using this function, see Gutter Shadow Correction in Image Settings
 (Advanced Mode tab).
Color Pattern...
Allows you to adjust the images overall color. You can correct colors that have faded due to
colorcast, etc. and reproduce natural colors while previewing color changes.
Note
See Adjusting Colors Using a...