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Diffstat (limited to 'pnmcolormap.html')
-rw-r--r-- | pnmcolormap.html | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/pnmcolormap.html b/pnmcolormap.html index 95fe49b9..8790862e 100644 --- a/pnmcolormap.html +++ b/pnmcolormap.html @@ -77,7 +77,7 @@ different colors. Before Netpbm 10.31 (December 2005), <b>pnmcolormap</b> ignored any image after the first. <p>If you want to create a colormap without basing it on the colors in -an input image, <b>pamseq</b>, <b>ppmmake</b>, and <b>pnmcat</b> can +an input image, <b>pamseq</b>, <b>ppmmake</b>, and <b>pamcat</b> can be useful. <h2 id="parameters">PARAMETERS</h2> @@ -192,9 +192,14 @@ luminosity of the color. E.g. red is weighted much more than blue. Select among these with the <b>-spreadbrightness</b> and <b>-spreadluminosity</b> options. The default is <b>-spreadbrightness</b>. Where there are multiple colors of the median magnitude, they are distributed arbitrarily among between -the subboxes. This arbitrary distribution depends upon what the system's -<b>qsort</b> function does with multiple equal values, so <b>pnmcolormap</b> -may produce slightly different results on different systems. +the subboxes. + +This arbitrary distribution is repeatable, though, for a given Netpbm version +-- every invocation of <b>pnmcolormap</b> generates the same color map. +Before Netpbm 11.03 (June 2023), the distribution would depend upon what the +system's <b>qsort</b> function does with multiple equal values, so +<b>pnmcolormap</b> may produce slightly different results on different +systems. <p><b>pnmcolormap</b> provides three ways of choosing a color to represent a box: 1) the center color - the color halfway between the greatest and least @@ -234,7 +239,7 @@ SIGGRAPH '82 Proceedings, page 297. <b><a href="ppmdither.html">ppmdither</a></b>, <b><a href="pamseq.html">pamseq</a></b>, <b><a href="ppmmake.html">ppmmake</a></b>, -<b><a href="pnmcat.html">pnmcat</a></b>, +<b><a href="pamcat.html">pamcat</a></b>, <b><a href="ppm.html">ppm</a></b> <h2 id="history">HISTORY</h2> |