Canon 630U Owner's Guide download pdf (Page 47)

S T E P 3

Descreen

Moiré patterns occasionally appear when items printed at low resolutions are scanned.

Moiré patterns are dot-like patterns that interfere with processing images for

professional use and are usually caused by poor dithering resulting from scanning

images from newspapers, books, magazines, etc. To reduce this phenomenon, scan

photographs and other low-resolution prints with the descreen activated. Shut it off to

scan higher resolution items. The default setting is “off”.

Caution

• The Descreen cannot be switched on for scanning resolutions higher than 601

dpi.

• The previous setting is enabled for the Descreen when Plug-in Module CS-U is

opened by a software application operating in the windowless mode.

Procedure

Open the [Image] menu and select [Descreen].

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Canon 630U Owner's Guide Page 47