1GLDS(1)                     General Commands Manual                    GLDS(1)
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NAME

6       glds,  glds_features  -  calculate  the  spatial  grey level difference
7       matrix and features on it
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SYNOPSIS

10       glds image matrix xpos ypos xsize ysize dx dy
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12       glds_features matrix
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DESCRIPTION

15       glds creates a 256 by 1  one  channel  spatial  grey  level  difference
16       matrix (sglds) of the box determined by the parameters (xp, yp; xs, ys)
17       within the vasari image file image.  The matrix  is  written  onto  the
18       vasari  image  file  matrix.   The displacement vector is determined by
19       (dx, dy).  The user must ensure that  there  is  enough  border  pixels
20       around the box within im dictated by the displacement vector (dx,dy) or
21       else the program fails.  All entries of the sgld matrix are double nor‐
22       malised  to  the  number  of pairs involved.  This function is a direct
23       implementation of the paper: Haralick R. M., Shanmugan K. and  Dinstein
24       I.,  'Textural features for image classification', IEEE Transactions on
25       Systems, Man, and Cybernetics, Vol. SMC-3, No 6, Nov. 1973, pp 610-621.
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27       Input im should be one band unsigned char image file.
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29       glds_features calculates features on the spatial grey level  difference
30       vasari  image  file matrix.  The calculated features are printed in the
31       stderr.
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SEE ALSO

34       im_glds_matrix(3X), im_glds_asm(3X), im_glds_contrast(3X), im_glds_cor‐
35       relation(3X), im_glds_entropy(3X).
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38       N. Dessipris
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AUTHOR

41       N. Dessipris - 27/02/1992
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45                                27 January 1992                        GLDS(1)
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