Canon imageCLASS MF5770 imageCLASS MF5700 Series Software Guide - Page 131
Unsharp Mask], Descreen]
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Scanning ■ [Unsharp Mask] Set to [ON] to emphasize and make sharper the outline of an image. This setting is selected by default. It is effective for scanning photos etc., which have a soft focus. IMPORTANT You cannot set [Unsharp Mask] to [ON] if [Black and White] or [Text Enhanced] is selected in [Color Mode]. ■ [Descreen] Set to [ON] when scanning printed photographs and pictures. The default setting is [OFF]. 3 IMPORTANT • You cannot set [Descreen] to [ON] if [Black and White] or [Text Enhanced] is selected in [Color Mode]. • Even if [Descreen] is set to [ON], some moire effect may remain if [Unsharp Mask] is also set to [ON]. In this case, disable [Unsharp Mask]. • [Descreen] cannot be set to [ON] when scanning from an application which will not display the [ScanGear MF] dialog box. If you are scanning from the MF Toolbox without using ScanGear MF, select [Color (Magazine)] in [Scan Mode] to activate [Descreen]. NOTE • Printed photographs and pictures are displayed as a collection of fine dots. If you scan without descreen, the dots may interfere with each other and cause an unevenness of gradation and a striped pattern in the image. [Descreen] is the function for reducing this moire effect. • Selecting [Magazine (Color)] in [Select Document Type] in Simple Mode has the same effect as selecting [Descreen] in Advanced Mode. Setting Preferences and Scanning with ScanGear MF 3-29