Image processing apparatus with improved gamma-correction

Details Image processing apparatus with improved gamma-correction Image processing apparatus with improved gamma-correction

1984-10-19

1987-10-13

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358280, 358282, 358293, H04N 140, H04N 110

Patent

active

047002360

ABSTRACT:
An image processing apparatus comprises an illumination device for illuminating an original image, a photosensing device for converting the illuminated original image to an electrical signal and a conversion device for converting the output data of the photosensing device. The illumination device has a variable light intensity relative to the original image, and the conversion device changes a data conversion mode between a first mode and a second mode in accordance with the light illumination of the illumination device.

REFERENCES:
patent: 3018331 (1962-01-01), McConnell
patent: 4288821 (1981-09-01), Lalallee et al.
patent: 4402015 (1983-08-01), Yamada
patent: 4495522 (1985-01-01), Matsunawa et al.

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