Image reader

Details Image reader Image reader

1987-01-22

1988-05-17

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

250214AG, 358280, H04N 140

Patent

active

047454881

ABSTRACT:
An image reader, comprises a plurality of photosensors which photoelectrically convert incident light from an object to be read, a memory for storing, as correction reference data, data corresponding to photoelectric conversion outputs from said photosensors when said object to be read presents a uniform halftone image, and a correction circuit for obtaining uniform photoelectric conversion output levels among said photosensors using the correction reference data.

REFERENCES:
patent: 4602291 (1986-07-01), Temes
patent: 4673807 (1987-06-01), Kobayashi
patent: 4680644 (1987-07-01), Shirato

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