Image reading apparatus capable of reading desired image areas

Details Image reading apparatus capable of reading desired image areas Image reading apparatus capable of reading desired image areas

1989-01-26

1991-07-16

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 47, 382 61, 358453, G06K 900

Patent

active

050331027

ABSTRACT:
A plurality of index members are arranged at desired positions on an end portion of a platen glass, the members being movable in a scanning direction of a scanner. A black mark is provided on a rear surface of each index member, and the mark as well as the original are read by an image reader, so that the positions of the index members can be detected. When one of the index members is detected as the scanner is moved, the image signals of the original included in the scanning region of the scanner are not outputted until the next index member is detected. In this manner, by continuously outputting image signals only of the desired areas of the original, the column skip edition can be readily and surely carried out.

REFERENCES:
patent: 4384272 (1983-05-01), Tanaka et al.
patent: 4700237 (1987-10-01), Yoshioka et al.
patent: 4750044 (1988-06-01), Nakajima
patent: 4751376 (1988-06-01), Sugiura et al.
patent: 4807041 (1989-02-01), Kishi et al.

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