Image analysis – Histogram processing – For setting a threshold
Patent
1990-08-27
1994-08-16
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 22, 382 1, G06K 936
Patent
active
053393651
ABSTRACT:
There is provided an image processing apparatus comprising: an input device to input an image signal; a processor for processing the input image signal and outputting an image reproduction signal; a detecting circuit to detect characteristics of the input image signal; and a control circuit to control conditions of processing of the image signal by the processor by means of a fuzzy inference based on characteristics of the image signal which were detected by the detecting circuit. Such characteristics of the image signal include the kind of image such as character, screen, and photograph. The optimum spatial filtering process can be executed for areas of each of the character, screen, and photograph types. A mixing ratio of the edge emphasis and the smoothing can be continuously changed for characteristic amounts of an original. Membership functions of a plurality of parameters are synthesized and a consequence is derived by the fuzzy inference algorithm. Thus, erroneous judgment for a vague image area is prevented and discontinuity which occurs at a change point of the image processes can be also eliminated.
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Kawai Takashi
Outa Kenichi
Canon Kabushiki Kaisha
Moore David K.
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