Image data processor

Details Image data processor Image data processor

1986-11-17

1988-05-03

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358260, 382 56, G06K 900

Patent

active

047425547

ABSTRACT:
The present invention is intended to binary process an image signal obtained by scanning image data by a plurality of threshold levels and to two-dimensionally encode a plurality of binary outputs derived in this way, thereby to telegraph-transmit an image at intermediate gradient. Then, by adopting the encoding by the Modified Read method which has a K parameter value coresponding to the number of such threshold levels, the intermediate gradient image can be telegraph-transmitted efficiently at a high speed. Furthermore, by merely increasing the threshold levels, the image at a variety of intermediate gradients of four, eight or sixteen values, or the like can be telegraph-transmitted and recorded, so that a degree of freedom is designing the apparatus is raised.

REFERENCES:
patent: 4196453 (1980-04-01), Warren
patent: 4409623 (1983-10-01), Kobayashi et al.
patent: 4447829 (1984-05-01), Schayes et al.
patent: 4547811 (1985-10-01), Ochi et al.
patent: 4554594 (1985-11-01), Ciardiello et al.
patent: 4578715 (1986-03-01), Yamaguchi

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