Image processing method

Details Image processing method Image processing method

1989-01-25

1992-02-04

Clark, David L.

Image analysis

Histogram processing

For setting a threshold

395142, G06F 314

Patent

active

050864823

ABSTRACT:
An image processing method for generating a convex hull of a configuration in a digital image. Top points of the convex hull are selected. A reference line connecting the top points is defined. For each area between two adjacent top points, continuous pixels are selected from one top point toward the other so that each pixel is the nearest to the referfence line as well as between the reference line and a contour of the configuration. Distances from pixels to the reference line are calculated from chain codes.

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patent: 4620287 (1986-10-01), Yam
patent: 4686635 (1987-08-01), Schrieber
patent: 4791581 (1988-12-01), Ohba
patent: 4829456 (1989-05-01), Joonishi et al.
patent: 4835722 (1989-05-01), Clarke et al.
Toussaint GT and Avis D, "One Covex Hull Algorithm for Polygons and Its Application to Triangulation Problems," Pattern Recognition, vol. 15, No. 1, pp. 23-29, 1982.
Shin Sy and Woo TC, "Finding the Convex Hull of a Simple Polygon in Linear Time," Pattern Recognition, vol. 19, No. 6, pp. 453-458, 1986.

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