| .TH GLDS 1 "27 January 1992" |
| .SH NAME |
| glds, glds_features \- calculate the spatial grey level difference matrix and features on it |
| .SH SYNOPSIS |
| glds image matrix xpos ypos xsize ysize dx dy |
| |
| glds_features matrix |
| .SH DESCRIPTION |
| .B glds |
| creates a 256 by 1 one channel spatial grey level difference |
| matrix (sglds) of the box |
| determined by the parameters (xp, yp; xs, ys) within |
| the vasari image file image. 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 sgld 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. |
| |
| Input im should be one band unsigned char image file. |
| |
| .B glds_features |
| calculates features on the spatial grey level difference vasari image |
| file matrix. The calculated features are printed in the stderr. |
| .SH SEE\ ALSO |
| im_glds_matrix(3X), im_glds_asm(3X), im_glds_contrast(3X), |
| im_glds_correlation(3X), im_glds_entropy(3X). |
| .SH COPYRIGHT |
| N. Dessipris |
| .SH AUTHOR |
| N. Dessipris \- 27/02/1992 |
