Image analysis – Histogram processing – For setting a threshold
Patent
1992-05-26
1993-07-06
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 27, G06K 936
Patent
active
052260950
ABSTRACT:
A method in which the position of an object pattern in an image can be accurately detected is disclosed. The method comprises the steps of: (a) preparing a reference pattern which has a pattern and a background which are composed of pixels each having a value regarding the brightness or gradation; (b) dividing the image into a plurality of sections; (c) selecting arbitrarily an area having two or more of the sections; (d) obtaining the brightness data from each of the sections; (e) obtaining a sum of products of the value of each pixel and the brightness data of each section corresponding to the pixel; (f) moving the area to another position in the image; (g) repeating steps (d) to (f); and (h) deciding that the area from which the sum having an extreme value is obtained is the one containing the object pattern.
REFERENCES:
patent: 3898617 (1975-08-01), Kashioka et al.
patent: 4334241 (1982-06-01), Kashioka et al.
patent: 4543660 (1985-09-01), Maeda
patent: 4581762 (1986-04-01), Lapidus et al.
Tzay Young "Handbook of Pattern Recognition and Image Processing" 1986, pp. 192-193, 219-220.
Mizuoka Seiji
Okumura Kazumasa
Fox David
Matsushita Electric - Industrial Co., Ltd.
Moore David K.
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