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Pgmtexture User Manual
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pgmtexture
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Updated: 22 Aug 1991
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Table Of Contents
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NAME
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pgmtexture - calculate textural features on a PGM image
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SYNOPSIS
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\fBpgmtexture\fR
[\fB-d\fR \fId\fR]
[\fIpgmfile\fR]
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DESCRIPTION
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This program is part of Netpbm.
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\fBpgmtexture\fR 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 \fId\fR (default = 1).
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Textural features include:
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Angular Second Moment
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Contrast
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Correlation
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Variance
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Inverse Difference Moment
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Sum Average
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Sum Variance
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Sum Entropy
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Entropy
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Difference Variance
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Difference Entropy
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Information Measures of Correlation
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Maximal Correlation Coefficient
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Algorithm taken from: Haralick, R.M., K. Shanmugam, and
I. Dinstein. 1973. Textural features for image classification.
\fIIEEE Transactions on Systems, Man, and Cybertinetics,\fR
SMC-3(6):610-621.
.SH 2
LIMITATIONS
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The program can run incredibly slow for large images (larger than
64 x 64) and command line options are limited.  The method for finding
the Maximal Correlation Coefficient, which requires finding the second
largest eigenvalue of a matrix Q, does not always converge.
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SEE ALSO
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pgm,
pamsharpness,
pamsharpmap,
pgmedge,
pgmminkowski
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AUTHOR
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Copyright (C) 1991 by Texas Agricultural Experiment Station, employer for
hire of James Darrell McCauley. 
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Table Of Contents
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NAME
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SYNOPSIS
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DESCRIPTION
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BUGS
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SEE ALSO
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AUTHOR
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