Canon scanner CanoScan LiDE 220 User Manual

•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.
151 

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...

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.
154 

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
156 

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.
(1) Settings and Operation Buttons Select Source Photo (Color) Scan color photos.
Magazine (Color) Scan color magazines.
Document (Color) Scan documents in color.
Document (Grayscale) Scan documents in black and white....

Note
•
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 Select this to print the scanned image on a printer.
Image display Select this to view the scanned image on a monitor.
OCR Select this to use the scanned image with OCR software.
"OCR software" is software that converts text scanned as an image into text data that can be edited in word...

Paper Size (L, A4, etc.)Select an output paper size. The portion within the cropping frame will be scanned at the size ofthe selected paper size. You can drag the cropping frame to enlarge/reduce it while maintaining
the aspect ratio.
Monitor Size (1024 x 768 pixels, etc.) Select an output size in pixels. A cropping frame of the selected monitor size will be displayed
and the portion within the cropping frame will be scanned. You can drag the cropping frame to
enlarge/reduce it while maintaining the...

Adjust cropping framesYou can adjust the scan area within the Preview area.
If an area is not specified, the document will be scanned at the document size (Auto Crop). If an area
is specified, only the portion in the cropping frame will be scanned.
Adjusting Cropping Frames (ScanGear)
Image corrections Allows you to apply corrections to images.
Important
•
Apply Auto Document Fix  and Correct fading  are available when  Recommended is selected
on the  Color Settings  tab of the Preferences  dialog box....