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-rw-r--r-- | pamarith.html | 4 |
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diff --git a/pamarith.html b/pamarith.html index e42af51d..edefd981 100644 --- a/pamarith.html +++ b/pamarith.html @@ -35,6 +35,10 @@ and height. The arithmetic is performed on each pair of identically located tuples to generate the identically located tuple of the output. +<p>Most of what <b>pamarith</b> does is not meaningful for visual images. It + works toward Netpbm's secondary purpose of just manipulating arbitrary + matrices of numbers. + <p>For the purpose of the calculation, it assumes any PBM, PGM, or PPM input image is the equivalent PAM image of tuple type <b>BLACKANDWHITE</b>, <b>GRAYSCALE</b>, or <b>RGB</b>, respectively, |