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<head><title>Analyze - Compare</title></head>
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<H3>Analyze - Compare</H3>
This command performs statistical comparisons between two images. An option
also exists for generating a difference image from the two input images.<P>
The three distance measures reported are:
<UL>
<LI> <B>d</B> The normalized root mean squared distance measure.
<LI> <B>r</B> The normalized mean absolute distance measure.
<LI> <B>e</B> The worst case distance measure over a <EM>2 x 2</EM> pixel area.
</UL>
<P>
There are also commands for comparison plotting of rows and columns from two images.
This is quite helpful when comparing a phantom to a reconstruction. As with plotting
of rows and columns, click the left mouse button over the desired cursor point to
choose which row and column to plot.<P>
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