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 flag
cooc_features matrix
DESCRIPTION
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 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_features calculates 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