Image analysis – Applications – Reading paper currency
Patent
1993-10-07
1996-05-07
Boudreau, Leo
Image analysis
Applications
Reading paper currency
382165, 355201, 902 7, G06K 900, G06K 946, G03G 2100, G07D 700
Patent
active
055154514
ABSTRACT:
An image processing system which reads, in pixel units, an image on an original document using a scanner, processes the read image data, and outputs the processed image data. The image processing system includes a system for recognizing a circular image of a specific color. The recognizing system includes a specific color detecting unit for detecting a specific color on an image on an original document; a first image detecting unit for detecting, in the image detected by the specific color detecting unit, images of the specific color at positions spaced from each other by a first distance corresponding to a diameter of a circle on a line extending in a fast scan direction; a second image detecting unit for detecting intersections of the circle having the diameter equal to the first distance and a line separated by a predetermined distance from a center of the circle in a slow scan direction when the specific color images are detected by the first image detecting unit; and a specific color image determining unit for determining that a contour containing the images of the specific color, detected by the three detecting units, is circular on the basis of the detection of a pitch line of a second distance by the second image detecting unit.
REFERENCES:
patent: 4720870 (1988-01-01), Billiotte et al.
patent: 4973851 (1990-11-01), Lee
patent: 5216724 (1993-06-01), Suzuki et al.
patent: 5321470 (1994-06-01), Hasuo et al.
Aikawa Koji
Leng Svay
Nakaya Fumio
Seki Masao
Shinohara Koichiro
Bella Matthew C.
Boudreau Leo
Fuji 'Xerox Co., Ltd.
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