Method and system for generating a density concurrent matrix

Details Method and system for generating a density concurrent matrix Method and system for generating a density concurrent matrix

1989-04-06

1991-06-11

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358455, 358460, H04N 1387

Patent

active

050237292

ABSTRACT:
An image processing method and apparatus generates a concurrence matrix for identifying characteristics in an image. Pixel density values of an original image are stored, and a shifted image is generated by shifting the pixels of the original image by a predetermined distance. A set of counts is generated. Each count corresponds to one density value selected out of the range of possible densities. Each count is the number of times that a pixel in the shifted image equals the selected density simultaneously with a corresponding pixel in the original image equaling a predetermined value. One column in the correspondence matrix corresponds to the counts for one predetermined value. The shift distance is varied to generate a set of matrices. From these matrices, contrast, texture and other characteristics in an image can be quantitatively recognized.

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patent: 4528693 (1985-07-01), Pearson et al.
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patent: 4725892 (1988-02-01), Suzuki et al.
patent: 4748515 (1988-05-01), Van Daele et al.
Weszka et al., A Comparative Study of Texture Measures for Terrain Classification, IEEE Transactions on Systems, Man and Cybernetics, vol. SMC-6, No. 4, Apr. 1976.

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