Optical image sensor semiconductor apparatus

Details Optical image sensor semiconductor apparatus Optical image sensor semiconductor apparatus

1978-03-06

1980-03-04

Fears, Terrell W.

Static information storage and retrieval

Radiant energy

Semiconductive

3151692, G11C 1142, G11C 1304

Patent

active

041920155

ABSTRACT:
The optical intensity pattern of a two-dimensional image field is electrically scanned a line at a time by a shift register access technique, thus providing a first stream of bits for each line. Each of these bits in a given line is compared with a dither coded second stream of bits generated in response to the background illumination (absence of image) along a line immediately adjacent to the line being scanned. The resulting sequence of comparisons is a dither coded signal representation of the line being scanned, which is compensated for nonuniform background illumination of the image field.

REFERENCES:
patent: 3944816 (1976-03-01), Harada
patent: 3967052 (1976-06-01), Judice
patent: 3996599 (1976-12-01), King
patent: 3997719 (1976-12-01), Judice

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