Imaging data processing apparatus

Details Imaging data processing apparatus Imaging data processing apparatus

1990-07-27

1991-04-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358460, H04N 123

Patent

active

050069373

ABSTRACT:
An image processing apparatus includes input circuitry for inputting an analog video signal, first conversion circuitry for converting the input analog video signal into multi-value data, and a memory for storing the multi-value data. Second conversion circuitry is provided for converting the multi-value data stored in the memory to binary data when executing its conversion process. The second conversion circuitry (1) detects a density gradient by comparing the multi-value data of pixels around a pixel to be converted with each other in each of vertical, lateral, and oblique directions, and (2) selects a multi-bit image pattern from a plurality of image patterns in response to the detected density gradient.

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