Image analysis – Applications – Biomedical applications
Patent
1997-09-19
1999-08-17
Au, Amelia
Image analysis
Applications
Biomedical applications
382260, G06K 900
Patent
active
059405279
ABSTRACT:
A value of the degree of centralization of gradient vectors, which has been calculated from an image signal, is compared with a threshold value, and a region of a prospective abnormal pattern is thereby determined. A picture element corresponding to a position, at which the center of gravity on the region of the prospective abnormal pattern is located, is taken as the picture element of interest, and a picture element corresponding to an end point that is associated with a mean value of index values for each radial direction line in iris filter processing, which mean value takes the maximum value, is thereby specified as a marginal point of the region of the prospective abnormal pattern in the direction along which the radial direction line extends. The thus set marginal points are connected by predetermined lines, and the region surrounded by the connecting lines is extracted as the prospective abnormal pattern. The contour shape of a prospective abnormal pattern having a shape with a special image density distribution is detected accurately.
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Ahmed Samir
Au Amelia
Fuji Photo Film Co. , Ltd.
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