pgmtexture - Man Page

• Extract textural features from a PGM image: pgmtexture path/to/image.pgm > path/to/output.pgm
• Specify the distance parameter for the feature extraction algorithm: pgmtexture -d distance path/to/image.pgm > path/to/output.pgm

tldr.sh

pgmtexture

[-d d]

[pgmfile]

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:

• Angular Second Moment
• Contrast
• Correlation
• Variance
• Inverse Difference Moment
• Sum Average
• Sum Variance
• Sum Entropy
• Entropy
• Difference Variance
• Difference Entropy
• Information Measures of Correlation

• 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.
   

In addition to the options common to all programs based on libnetpbm (most notably -quiet, see Common Options ), pgmtexture recognizes the following command line option:

-d distance

The distance.  Default is 1.

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

pgm(1), pamsharpness(1), pamsharpmap(1), pgmedge(1), pgmminkowski(1)

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

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