cooc(1) cooc(1)

## NAME

cooc, cooc_features - calculate the co-occurrence matrix and features on it

## SYNOPSIS

cooc image matrix xpos ypos xsize ysize dx dy flagcooc_featuresmatrix

## DESCRIPTION

cooccreates a 256 by 256 one channel co-occurrence matrix of the box determined by the parameters (xp, yp; xs, ys) within the image file. The matrix is written onto the Vasari image file matrix. The displace- ment vector is determined by (dx, dy). The user must ensure that there is enough border pixels around the box within im dictated by the dis- placement vector (dx,dy) or else the program fails. All entries of the co-occurrence matrix are double normalised to the number of pairs involved. This function is a direct implementation of the paper: Har- alick R. M., Shanmugan K. and Dinstein I., 'Textural features for image classification', IEEE Transactions on Systems, Man, and Cybernetics, Vol. SMC-3, No 6, Nov. 1973, pp 610-621. If flag sym is 1, the created co-occurrence matrix is symmetric that is dispacement vectors (dx, dy), (-dx, -dy) create exactly the same matrix. If sym is 0, the created co-occurrence matrix is not symmetric that is dispacement vectors (dx, dy), (-dx, -dy) create different matrices. Input image should be one band unsigned char image.cooc_featurescalculates and prints at the standard error output fea- tures of the cooccurrence matrix matrix.

## SEE ALSO

im_glds_matrix(3X),im_cooc_asm(3X),im_cooc_contrast(3X),im_cooc_cor-relation(3),im_cooc_entropy(3X)

## COPYRIGHT

N. Dessipris

## AUTHOR

N. Dessipris - 27/2/1992 27 Jan 1992 cooc(1)

cooc 7.14.5 - Generated Fri Sep 5 18:41:53 CDT 2008