Image analysis – Histogram processing – For setting a threshold
Patent
1993-01-25
1994-03-22
Couso, Jose L.
Image analysis
Histogram processing
For setting a threshold
382 53, 358466, G06K 938
Patent
active
052972216
ABSTRACT:
An image signal processing apparatus is provided with an image signal generation device for sequentially generating image signals representing light and shade of an original image per every picture element. The image signal processing apparatus is also provided with an extreme portion detection device for comparing the generated image signal of an observation picture element and each of the generated image signals of a plurality of peripheral picture elements which are positioned in the vicinity of the observation picture element, and judging whether the compared observation picture element is an extreme portion or not. The image signal processing apparatus is further provided with a correction device for correcting a level of the image signal of the observation picture element, which is judged to be the extreme portion by the extreme portion detection device, by use of a calculation predetermined with respect to the level of the image signal.
REFERENCES:
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patent: 4554593 (1985-11-01), Fox et al.
patent: 4709274 (1987-11-01), Tanioka
patent: 4710822 (1987-12-01), Matsunawa
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European Search Report dated Nov. 12, 1992.
Sekikawa, K., "Picture Compensation Processing Method" Jan. 21, 1983 (English Abstract).
Nagaoka, T., "Picture Processor", Nov. 25, 1985 (English Abstract).
Masuda Kazuya
Yamaji Kouji
Conlin David G.
Couso Jose L.
Neuner George W.
Sharp Kabushiki Kaisha
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