Canon printer PIXMA MX490 User Manual

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 (Concave curve)
The midtone data of the input side is stretched toward the shadow of the...

Edit custom curve
You can drag specific points on the Tone Curve to freely adjust the brightness of the corresponding areas.
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Setting ThresholdYou can sharpen text in a document or reduce show-through in newspapers by adjusting the threshold level
via 
 (Threshold) in ScanGear (scanner driver)'s  Advanced Mode tab.
Note
•
This function is available when  Color Mode is Black and White .
•
Click Defaults  to reset all adjustments in the current window.
Adjusting 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...

ScanGear (Scanner Driver) Screens
Basic Mode Tab
Advanced Mode Tab
Input Settings
Output Settings
Image Settings
Color Adjustment Buttons
Preferences Dialog Box
Scanner Tab
Preview Tab
Scan Tab
Color Settings  Tab
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Basic Mode TabThis mode allows you to scan easily by following the on-screen steps.This section describes the settings and functions available on the  Basic Mode tab.
(1) Settings and Operation Buttons
(2) Toolbar
(3) Preview Area
Note
•
The displayed items vary by document type and view.
•
The preview function is not available when scanning from the ADF (Auto Document Feeder).
(1) Settings and Operation Buttons Select Source Photo (Color) Scan color photos.
Magazine (Color) Scan color magazines....

Important•
Some applications do not support continuous scanning from the ADF. For details, refer to theapplication's manual.
Note
•
When you select a document type, the unsharp mask function will be active.
•
When you select an option other than the ADF types, the image adjustment function which
adjusts images based on the document type will also be active.
•
If you select  Magazine (Color) , the descreen function will be active.
Display Preview Image PreviewPerforms a trial scan.
Note
•
When using...

FlexibleAllows you to freely adjust the cropping frames (scan areas).
In thumbnail view: Drag the mouse over a thumbnail to display a cropping frame. When a cropping frame is
displayed, the portion within the cropping frame will be scanned. When no cropping frame is
displayed, each frame is scanned individually.
In whole image view:
When no cropping frame is displayed, the entire Preview area will be scanned. When a cropping
frame is displayed, the portion within the cropping frame will be scanned.
Paper...

Note•
Save up to 10 items.
•
An error message appears when you enter a value outside the setting range. Enter a value
within the setting range.
Note
•
For details on whether or how the cropping frame is initially displayed on a preview image, refer to  Cropping Frame on Previewed Images  in "
Preview Tab" (Preferences  dialog box).
 Invert aspect ratio
Available when  Output Size is set to anything but  Flexible.
Click this button to rotate the cropping frame. Click again to return it to the...

Important•
This setting is not available when you select Color Matching on the Color Settings  tab of
the  Preferences  dialog box.
Perform Scan Scan Starts scanning.
Note
•
When scanning starts, the progress will be displayed. Click  Cancel to cancel the scan.
Preferences... Opens the 
Preferences dialog box  in which you can make scan/preview settings.
Close Closes ScanGear (scanner driver).
(2) Toolbar
You can adjust or rotate preview images. The buttons displayed on the Toolbar vary by view.
In...

 (Check All Frames)
Available when two or more frames are displayed.
Selects the checkboxes of the image in thumbnail view.
 (Uncheck All Frames)
Available when two or more frames are displayed.
Deselects the checkboxes of the image in thumbnail view.
 (Select All Frames)
Available when two or more frames are displayed.
Selects the images in thumbnail view and outlines them in blue.
 (Select All Cropping Frames)
Available when two or more cropping frames are specified.
Turns the cropping frames into...