Ricoh HS2P PLUS Service Manual - Page 13

Browse online or download pdf Service Manual for Scanner Ricoh HS2P PLUS. Ricoh HS2P PLUS 21 pages. Machine code g413

Print Page

IMAGE PROCESSING

16 February 2000

Error Diffusion

The error diffusion process reduces the difference in contrast between light and

dark areas of a halftone image. Each pixel is corrected using the difference

between it and the surrounding pixels. The corrected pixels are then compared with

a matrix table.

Binary Picture Processing

Each video signal level is converted from 8-bit to 1-bit (black and white image data)

in accordance with a threshold value.

White/Black Conversion

Inverts the image (converts from white to black and vice versa).

After video processing, the data goes to the host computer through the memory

and SCSI controllers.

2-20