Method and apparatus for detecting false edges in an image

Details Method and apparatus for detecting false edges in an image Method and apparatus for detecting false edges in an image

1990-03-19

1991-06-18

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

G06K 946

Patent

active

050254782

ABSTRACT:
A method of and apparatus for processing a picture signal for transmission in which the picture signal (Y) is applied to a segmentation device (2) where it is subjected to a segmentation algorithm to identify regions of similar intensity. The resulting region signal is applied to a modal filter (9) in which region edges are straightened and then to an adaptive contour smoothing circuit (10) in which contour sections identified as representing false edges are filtered. The filtered signal is subtracted from the original luminance signal in a subtractor (12) to produce a luminance texture signal which is encoded by a texture encoder (17). The region signal is encoded in a region encoder (24) together with flags indicating which of the contours in the region signal represent false edges.

REFERENCES:
patent: 4553165 (1985-11-01), Bayer
patent: 4644583 (1987-02-01), Watanabe et al.
O. J. Morris et al., "Graph Theory for Image Analysis: an Approach Based on the Shortest Spanning Tree", IEE Proceedings, vol. 133, Pt. F., No. 2, Apr. 1986.

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