Image reading apparatus

Details Image reading apparatus Image reading apparatus

1980-09-22

1983-05-17

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 65, G06K 900

Patent

active

043842720

ABSTRACT:
An improved image reading apparatus which is so arranged that, by providing marks shaded to a predetermined density or darkness for setting a required reading area on an image reading surface, the start mark and end mark are detected by a solid state image sensor for supplying image signals within the required reading range into memory unit based on results of the on detection so as to reduce the memory capacity of the memory unit.

REFERENCES:
patent: 3058093 (1962-10-01), Vernon et al.
patent: 3201752 (1965-08-01), Rabinow
patent: 4149143 (1979-04-01), Nagano et al.
patent: 4219736 (1980-08-01), Thibodeau
patent: 4297676 (1981-10-01), Moriya et al.
Dattilo et al., "Variable Intensity Illumination Scanner Calibration System", IBM Tech. Disc. Bulletin, vol. 21, No. 9, Feb. 1979, pp. 3546-3547.

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