Canon imageFORMULA ScanFront 220 Instruction Manual - Page 124
Document orientation, Deskew, Bleed-through reduction, Contrast
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Document orientation Chapter 6 Operating Procedures IMPORTANT If you select [Prefer Quality], the scanning speed is reduced. If you are scanning a large number of pages, select [Prefer Speed] to prevent a decrease in scanning speed. Bleed-through reduction Rotates the scanned image a specified amount. Hint If you select [Auto], the orientation of text within the document is detected and the image is rotated so that the orientation of the text is correct. Deskew Eliminates bleed-through images, in which images on the reverse side of a scanned document appear on the scanned page, such as when scanning thin documents with text or images on both sides. Hint When using bleed-through reduction, adjust the bleed-through reduction level to match the type of document. Contrast The scanner detects from the scanned image that the document was fed askew and then straightens the image. • Prefer Quality Image processing is performed to minimize the loss of quality of an image that has deteriorated as result of deskewing. • Prefer Speed The image deteriorates slightly as a result of deskewing. Adjust the contrast for the images to scan. 6-26