Canon 4205B002 User Manual page 621

When this checkbox is selected, the files can be saved in JPEG/Exif or PDF format only.
Scanning may take longer than usual when this checkbox is selected.
This function is not available when scanning by pressing the Black button with Auto Scan
selected on the Operation Panel of the machine.
The color tone may change from the source image due to corrections. In that case, deselect the
checkbox and scan.
Descreen
Set this item using the Operation Panel of the machine.
Unsharp Mask
Set this item using the Operation Panel of the machine.
Remove gutter shadow (Platen) / Remove gutter shadow
Select this checkbox to correct shadows that appear between pages when scanning open booklets.
When Document Type is Photo, the checkbox changes to Remove gutter shadow.
Important
This function is available only when scanning from the Platen.
Align the document correctly with the alignment mark on the Platen.
Note
Use ScanGear (scanner driver)'s Advanced Mode tab to correct gutter shadows when scanning
non-standard size documents or when custom cropping frames are set.
For details, see Gutter Shadow Correction in "
Reduce Show-through
Set this item using the Operation Panel of the machine.
Text Document Handling
Set to detect text in text documents and apply suitable corrections.
This function is available when Document is selected for Document Type on the Scanner Button
Settings tab of the Preferences dialog box.
Correct slanted document
Select this checkbox to detect the scanned text and correct the angle (within -0.1 to -10 degrees or +0.1
to +10 degrees) of the document.
Important
The inclination of the following types of documents may not be corrected, as 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 or hand-written text
- Documents containing both vertical and horizontal lines (tables)
Note
Scanning takes longer than usual when you enable Correct slanted document.
Detect the orientation of text documents and rotate images
Select this checkbox to detect the orientation of the document from the scanned text and rotate the
scanned image to the correct orientation. Select the language of the document to be scanned in
Document Language.
Important
This function may not work properly depending on the document language. Only text documents
written in languages that can be selected from Document Language are supported.
The orientation of the following types of documents may not be corrected, as the text cannot be
detected correctly.
- Resolution is outside the range of 300 dpi to 600 dpi
Image Settings " (ScanGear's Advanced Mode tab).