Image analysis – Histogram processing – With a gray-level transformation
Patent
1994-11-17
1998-05-05
Boudreau, Leo
Image analysis
Histogram processing
With a gray-level transformation
382170, 382274, 358461, G06K 900
Patent
active
057487731
ABSTRACT:
An image processing apparatus having a first mode for processing electrical signals by a pre-scan operation and a second mode for processing electrical signals by a main scan operation. The first mode forms a histogram on the basis of electrical signals obtained by the pre-scan operation, and detects predetermined feature points from the formed histogram. A table is formed for converting signal levels of the electrical signals according to the detected predetermined feature points of the histogram based on the image type of the original. The second mode generates reproduction signals from electrical signals obtained by the main scan operation in accordance with the table.
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Abe Yoshinori
Ichikawa Hiroyuki
Itoh Akio
Kutsuwada Satoru
Suzuki Yoshiyuki
Boudreau Leo
Canon Kabushiki Kaisha
Tran Phuoc
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