Canon CanoScan D646U CanoScan D646U Plug-in Module CS-U 4.0 for Mac Guide - Page 51
Descreen
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Descreen STEP 3 Moiré patterns occasionally appear when items printed at high resolutions are scanned. To reduce this phenomenon, scan photographs and other high-resolution prints with the Descreen function enabled. Shut it off to scan lower resolution items, such as newspapers, books and magazine text. The default setting is "off." Caution • The Descreen function cannot be switched on for scanning resolutions higher than 601 dpi. • The previous setting is enabled for the Descreen function when Plug-in Module CS-U is opened by a software application operating in the windowless mode. Operating Procedures Open the [Image] menu and select [Descreen]. A check mark will appear beside the Descreen option in the menu when this function is set to On. To set it to Off, reselect it. The check mark will disappear. 51