Canon PIXMA MX320 On-Screen Manual - Page 511

Correcting Images (Unsharp Mask, Reduce Dust and Scratches, Fading Co... Page 511 of 817 pages Reducing show-through in text documents or lightening the base color in recycled paper, newspapers, etc. when scanning from the ADF (Auto Document Feeder) Set Reduce Show-through to Low or High according to the degree of show-through or darkness of the base color. None Low Sharpening slightly out-of-focus images Set Unsharp Mask to ON. OFF ON Reducing gradations and stripe patterns Set Descreen to ON. OFF ON Note "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. Reducing dust and scratches Set Reduce Dust and Scratches to Low, Medium or High according to the degree of dust and scratches. None Medium