| .TH COOC 1 "27 Jan 1992" |
| .SH NAME |
| cooc, cooc_features \- calculate the co-occurrence matrix and features on it |
| .SH SYNOPSIS |
| cooc image matrix xpos ypos xsize ysize dx dy flag |
| |
| .br |
| .B cooc_features matrix |
| .SH DESCRIPTION |
| .B cooc |
| creates 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 displacement |
| vector is determined by (dx, dy). The user must ensure that there |
| is enough border pixels around the box within im dictated by the displacement |
| 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: |
| Haralick 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. |
| |
| .B cooc_features |
| calculates and prints at the standard error output features |
| of the cooccurrence matrix matrix. |
| .SH SEE\ ALSO |
| im_glds_matrix(3X), im_cooc_asm(3X), im_cooc_contrast(3X), |
| im_cooc_correlation(3X), im_cooc_entropy(3X) |
| .SH COPYRIGHT |
| .br |
| N. Dessipris |
| .SH AUTHOR |
| N. Dessipris \- 27/2/1992 |
