147 lines
2.7 KiB
HTML
147 lines
2.7 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of pgmtexture</TITLE>
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</HEAD><BODY>
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<H1>pgmtexture</H1>
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Section: User Commands (1)<BR>Updated: 22 Aug 1991<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="ixAAB"></A>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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pgmtexture - calculate textural features on a portable graymap
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>pgmtexture</B>
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[<B>-d</B>
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<I>d</I>]
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[<I>pgmfile</I>]
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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Reads a portable graymap as input. Calculates textural features
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based on spatial dependence matrices at 0, 45, 90, and 135 degrees for
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a distance
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<I>d</I>
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(default = 1).
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Textural features include:
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<DL COMPACT>
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<DT id="1"><DD>
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(1) Angular Second Moment,
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<BR>
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(2) Contrast,
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<BR>
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(3) Correlation,
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<BR>
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(4) Variance,
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<BR>
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(5) Inverse Difference Moment,
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<BR>
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(6) Sum Average,
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<BR>
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(7) Sum Variance,
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<BR>
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(8) Sum Entropy,
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<BR>
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(9) Entropy,
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<BR>
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(10) Difference Variance,
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<BR>
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(11) Difference Entropy,
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<BR>
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(12, 13) Information Measures of Correlation, and
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<BR>
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(14) Maximal Correlation Coefficient.
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</DL>
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<P>
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Algorithm taken from:
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<BR>
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Haralick, R.M., K. Shanmugam, and I. Dinstein. 1973. Textural features
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for image classification.
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<I>IEEE Transactions on Systems, Man, </I>
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<I>and Cybertinetics,</I>
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<A HREF="/cgi-bin/man/man2html?6+SMC-3">SMC-3</A>(6):610-621.
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<A NAME="lbAE"> </A>
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<H2>BUGS</H2>
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The program can run incredibly slow for large images (larger than 64 x 64)
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and command line options are limited.
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The method for finding (14) the maximal correlation coefficient, which
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requires finding the second largest eigenvalue of a matrix Q, does not
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always converge.
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<A NAME="lbAF"> </A>
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<H2>REFERENCES</H2>
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<I>IEEE Transactions on Systems, Man, </I>
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<I>and Cybertinetics,</I>
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<A HREF="/cgi-bin/man/man2html?6+SMC-3">SMC-3</A>(6):610-621.
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<A NAME="lbAG"> </A>
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<H2>SEE ALSO</H2>
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<A HREF="/cgi-bin/man/man2html?5+pgm">pgm</A>(5), <A HREF="/cgi-bin/man/man2html?1+pnmcut">pnmcut</A>(1)
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<A NAME="lbAH"> </A>
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<H2>AUTHOR</H2>
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Copyright (C) 1991 by Texas Agricultural Experiment Station, employer for
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hire of James Darrell McCauley.
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="2"><A HREF="#lbAB">NAME</A><DD>
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<DT id="3"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="4"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="5"><A HREF="#lbAE">BUGS</A><DD>
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<DT id="6"><A HREF="#lbAF">REFERENCES</A><DD>
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<DT id="7"><A HREF="#lbAG">SEE ALSO</A><DD>
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<DT id="8"><A HREF="#lbAH">AUTHOR</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:23 GMT, March 31, 2021
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</BODY>
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</HTML>
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