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Pgmtexture User	Manual(0)			     Pgmtexture	User Manual(0)

NAME
       pgmtexture - calculate textural features	on a PGM image

SYNOPSIS
       pgmtexture

       [-d d]

       [pgmfile]

DESCRIPTION
       This program is part of Netpbm(1).

       pgmtexture  reads a PGM image as	input and calculates textural features
       based on	spatial	dependence matrices at 0, 45, 90, and 135 degrees  for
       a distance d (default = 1).

       Textural	features include:

       o      Angular Second Moment

       o      Contrast

       o      Correlation

       o      Variance

       o      Inverse Difference Moment

       o      Sum Average

       o      Sum Variance

       o      Sum Entropy

       o      Entropy

       o      Difference Variance

       o      Difference Entropy

       o      Information Measures of Correlation

       o      Maximal Correlation Coefficient

       Algorithm  taken	 from:	Haralick, R.M.,	K. Shanmugam, and I. Dinstein.
       1973. Textural features for image classification.  IEEE Transactions on
       Systems,	Man, and Cybertinetics,	SMC-3(6):610-621.

LIMITATIONS
       The  method  for	finding	the Maximal Correlation	Coefficient, which re-
       quires finding the second largest eigenvalue of a matrix	 Q,  does  not
       always converge.

SEE ALSO
       pgm(5), pamsharpness(1),	pamsharpmap(1),	pgmedge(1), pgmminkowski(1)

AUTHOR
       Copyright  (C)  1991 by Texas Agricultural Experiment Station, employer
       for hire	of James Darrell McCauley.

DOCUMENT SOURCE
       This manual page	was generated by the Netpbm tool 'makeman'  from  HTML
       source.	The master documentation is at

	      http://netpbm.sourceforge.net/doc/pgmtexture.html

netpbm documentation		  22 Aug 1991	     Pgmtexture	User Manual(0)

NAME | SYNOPSIS | DESCRIPTION | LIMITATIONS | SEE ALSO | AUTHOR | DOCUMENT SOURCE

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