Photo Mode - Ricoh B003 Service Manual

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Table of Contents

IMAGE PROCESSING

Photo Mode

Photo mode emphasizes grayscale processing to achieve the best possible

reproduction of photographs and eliminate moiré by using the highest density and γ

coefficient in the reproduction of grayscales and dithering. Print Photo performs

smoothing and dithering for photos copied from magazines, newspapers, etc. The

Normal selection uses a higher resolution setting and employs error diffusion but

does not use smoothing to improve the appearance of text in photographs. Glossy

photo paper employs MTF filter processing and error diffusion to copy glossy or

matte photographs and achieves a low incidence of moiré, thus reproducing copies

of photographs of high resolution.

Image Processing Flow

Scanner Image

Magnification

Main Scan Direction

Independent Dot Erase

Density Control

Dither/Error Diffusion

B003/B004/B06/B007

CÓPIA NÃO CONTROLADA

Shading Correction

Background Erase

MTF Correction

γ Coefficient

CÓPIA NÃO CONTROLADA

Related SP Modes

SP4-903-66 (Background Erase Level)

SP4-903-12 (Pre-Filter Coefficient)

SP2-909-01 (Main Scan Magnification)

Not done in Photo mode

SP4-903-09 (Filter Selection)

SP4-903-37 (Smoothing Filter Coefficient)

SP4-903-36 (MTF Filter Coefficient)

SP4-903-38 (MTF Filter Strength)

SP4-904-02 (Photo Mode Image Quality

Processing – Dither Matrix Type)

B004 B006 B007