Image analysis – Histogram processing – For setting a threshold
Patent
1989-05-26
1992-04-28
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
35821311, 35821326, 35821331, G06K 928, H04N 314
Patent
active
051094401
ABSTRACT:
A plurality of opto-electro conversion elements are arranged integrally in a row to constitute a line image sensor to produce respective image bit signals. A plurality of switching elements are connected to the corresponding conversion elements and switchable between on and off states to read out the corresponding bit image signals. A scanning circuit scans sequentially the switching elements to successively turn on them to thereby effect the sequential reading of bit image signals. An initiating circuit is connected to the scanning circuit for generating an initiating signal effective to initiate the scanning circuit. An ending circuit is also connected to the scanning circuit and operates after the switching element of last stage is turned off for generating an ending signal indicative of the ending of scanning operation for one line. A control circuit receives the initiating and ending signals and produces a control signal. A gate circuit is commonly connected to the switching elements and made open according to the control signal to output the series of image bit signals.
REFERENCES:
patent: 4663672 (1987-05-01), Sakamoto
patent: 4745480 (1988-05-01), Kinugasa et al.
patent: 4788522 (1988-11-01), Itagaki et al.
patent: 4835617 (1989-05-01), Todaka et al.
Japan Telecomm. Rev., vol. 19, No. 3, Jul. 1977, pp. 209-216, M. Orii et al., "Mini fax-A trial small-size facsimile".
Kawahara Yukito
Machida Satoshi
Mukainakano Hiroshi
Adams Bruce L.
Boudreau Leo H.
Seiko Instruments Inc.
Wilks Van C.
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