Canon PIXMA MX320 On-Screen Manual - Page 428

Scan Settings Dialog Box (Photos/Documents) Page 428 of 817 pages Select this checkbox to reduce moire patterns. Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are scanned. Descreen is the function for reducing this moire effect. Important You cannot select this checkbox when Document Type is Color Photo, Black and White Photo or Text(OCR). Note Scanning takes longer than usual when you enable Descreen. Unsharp Mask Select this checkbox to emphasize the outline of the subjects and sharpen the image. Important You cannot select this checkbox when Document Type is Text(OCR). Reduce Show-through Select this checkbox to sharpen text in a document or reduce show-through in newspapers. Important You cannot select this checkbox when Document Type is Color Photo, Black and White Photo or Text(OCR). Note Select this checkbox when Document Type is text document and show-through is apparent in the scanned image. Remove gutter shadow Select this checkbox to correct shadows that appear between pages when scanning open booklets. Important You cannot select this checkbox when Document Size is Auto Detect, Auto Detect (Multiple Documents) or Stitch Assist. Align the document correctly with the marks on the Platen. Note Use ScanGear'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 " Image Settings" (ScanGear's Advanced Mode tab). 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 You cannot select this checkbox when Document Type is Color Photo or Black and White Photo. You cannot select this checkbox when Document Size is Stitch Assist. 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