Canon PIXMA MG4200 Series On-Screen Manual page 740

Apply Auto Document Fix
Select this checkbox to sharpen text in a document or magazine for better readability.
Important
Available only when the Compress scanned images upon transfer checkbox is not
selected.
The color tone may differ from the source image due to corrections. In that case, deselect
the checkbox and scan.
Note
Scanning takes longer than usual when you enable this function.
Reduce gutter shadow
Reduces gutter shadows that appear between pages when scanning open booklets.
Important
Available only when the Compress scanned images upon transfer checkbox is not
selected.
Correct slanted text document
Detects the scanned text and corrects the angle (within -0.1 to -10 degrees or +0.1 to +10
degrees) of the document.
Important
The following types of documents may not be corrected properly since the text cannot be
detected correctly.
- Documents in which the text lines are inclined more than 10 degrees or the angles vary by
line
- Documents containing both vertical and horizontal text
- Documents with extremely large or small fonts
- Documents with small amount of text
- Documents containing figures/images
- Hand-written text
- Documents containing both vertical and horizontal lines (tables)
Note
Scanning takes longer than usual when you enable Correct slanted text document.
Detect the orientation of text document and rotate image
Automatically rotates the image to the correct orientation by detecting the orientation of text in the
scanned document.
Important
Only text documents written in languages that can be selected from Document Language in
the Settings (General Settings) dialog are supported.
Settings (General Settings) Dialog
The orientation may not be detected for the following types of settings or documents since
the text cannot be detected correctly.
- Resolution is outside the range of 300 dpi to 600 dpi
- Font size is outside the range of 8 points to 48 points
- Documents containing special fonts, effects, italics, or hand-written text
- Documents with patterned backgrounds
(2) Save Settings Area