Method for recognizing concavities in an image subject to character recognition
First Claim
Patent Images
1. An image processing method for recognizing a configuration in an image from a characteristics representation of the configuration comprising the steps of:
- representing the image as digital pixels;
generating a convex hull for the configuration, said convex hull delineated by a series of pixels connecting top points of the configuration;
generating a representation of the configuration as characteristics of the difference between the convex hull and the configuration, said characteristics including concavities in the configuration; and
wherein the step of generating a representation of the configuration includes steps of;
representing a contour of the configuration between two adjacent top points as a series of chain codes, said top points defining a straight line segment;
calculating separation distances between the contour of the configuration and the straight line segment; and
generating a representation of the contour as a concavity when a separation distance is greater than a predetermined value.
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Abstract
An image processing method for finding concavity of a configuration comprising steps; arranging boundary pixels of the configuration according to chain order with indicating top points on convex hull of the configuration; and determining that a concavity is defined by the boundary pixels when a boundary pixel of a chain code is found, which chain code indicates a concavity.
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Citations
7 Claims
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1. An image processing method for recognizing a configuration in an image from a characteristics representation of the configuration comprising the steps of:
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representing the image as digital pixels; generating a convex hull for the configuration, said convex hull delineated by a series of pixels connecting top points of the configuration; generating a representation of the configuration as characteristics of the difference between the convex hull and the configuration, said characteristics including concavities in the configuration; and wherein the step of generating a representation of the configuration includes steps of; representing a contour of the configuration between two adjacent top points as a series of chain codes, said top points defining a straight line segment; calculating separation distances between the contour of the configuration and the straight line segment; and generating a representation of the contour as a concavity when a separation distance is greater than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification