[GRASS-SVN] r49133 - grass/trunk/imagery/i.fft
svn_grass at osgeo.org
svn_grass at osgeo.org
Tue Nov 8 04:29:27 EST 2011
Author: neteler
Date: 2011-11-08 01:29:27 -0800 (Tue, 08 Nov 2011)
New Revision: 49133
Modified:
grass/trunk/imagery/i.fft/i.fft.html
Log:
NC example added
Modified: grass/trunk/imagery/i.fft/i.fft.html
===================================================================
--- grass/trunk/imagery/i.fft/i.fft.html 2011-11-08 09:26:52 UTC (rev 49132)
+++ grass/trunk/imagery/i.fft/i.fft.html 2011-11-08 09:29:27 UTC (rev 49133)
@@ -23,29 +23,38 @@
reading the input file. The presence of nulls or a mask will make the
resulting fast Fourier transform invalid.
+<h2>EXAMPLE</h2>
+
+North Carolina example:
+
+<div class="code"><pre>
+g.region rast=lsat7_2002_70
+i.fft input_image=lsat7_2002_70 real=lsat7_2002_70.real imaginary=lsat7_2002_70.imag
+
+# set region to resulting FFT output map (due to new FFT coordinate space):
+g.region rast=lsat7_2002_70.real -p
+d.mon x0
+d.rast lsat7_2002_70.real
+d.rast lsat7_2002_70.imag
+</pre></div>
+
<h2>SEE ALSO</h2>
-M. Frigo and S. G. Johnson (1998): "FFTW: An Adaptive Software Architecture
-for the FFT". See <a href="http://www.fftw.org/">www.fftw.org</a>: FFTW is a C subroutine library
+<ul>
+<li> M. Frigo and S. G. Johnson (1998): "FFTW: An Adaptive Software Architecture
+for the FFT". See <a href=>www.FFTW.org</a>: FFTW is a C subroutine library
for computing the Discrete Fourier Transform (DFT) in one or more
dimensions, of both real and complex data, and of arbitrary input size.
-<p>
+<li> John A. Richards, 1986. Remote Sensing Digital Image Analysis, Springer-Verlag.
+</ul>
-<b>Remote Sensing Digital Image Analysis</b>,
-by John A. Richards,
-Springer-Verlag, 1986.
+<P>
+Personal communication, between progam author and Ali R. Vali,
+Space Research Center, <A HREF="http://www.utexas.edu">University of Texas</A>, Austin, 1990.
-
<p>
-Personal communication,
-between progam author and Ali R. Vali,
-Space Research Center,
-<a href="http://www.utexas.edu">University of Texas</A>, Austin, 1990.
-
-<p>
-
<em><a href="i.cca.html">i.cca</A></em><br>
<em><a href="i.class.html">i.class</A></em><br>
<em><a href="i.ifft.html">i.ifft</A></em><br>
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