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glds, glds_features - calculate the spatial grey level difference matrix
and features on it
glds image matrix xpos ypos xsize ysize dx dy
glds_features matrix
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.
glds_features calculates features on the spatial grey
level difference vasari image file matrix. The calculated features are
printed in the stderr.
im_glds_matrix(3X)
, im_glds_asm(3X)
, im_glds_contrast(3X)
,
im_glds_correlation(3X)
, im_glds_entropy(3X)
.
N. Dessipris
N.
Dessipris - 27/02/1992
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