Canon MX490 series Online Manual page 578

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• Printed photos and pictures are displayed as a collection of fine dots. "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

Correcting photos that have faded with time or due to colorcast

Set Fading Correction to Low, Medium, or High according to the degree of fading or colorcast.

Reducing graininess

Set Grain Correction to Low, Medium, or High according to the degree of graininess.

Correcting shadows that appear between pages when scanning open booklets

Set Gutter Shadow Correction to Low, Medium, or High according to the degree of shadows.

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Troubleshooting