Legacy ImageMagick Discussions Archive

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svn diff -r 8805:8813 Changelog
svn: 'Changelog' is not under version control
svn diff -r 8800:8813 magick/enhance.c
Index: magick/enhance.c
===================================================================
--- magick/enhance.c	(revision 8800)
+++ magick/enhance.c	(revision 8813)
@@ -3842,17 +3842,15 @@
 	 * range.
 	 *
 	 * "+epsilon" is to allow a=0 without division by zero.
-         *
-     	 * "+0.5" below is to round by casting.
          */
         sigmoidal_map[i]=(MagickRealType) ScaleMapToQuantum((MagickRealType)
-          (MaxMap*(0.5+(uu-(u0+u1)/2.0)/(u1-u0+MagickEpsilon))+0.5));
+          (MaxMap*(0.5+(uu-(u0+u1)/2.0)/(u1-u0+MagickEpsilon))));
 #else
         /* Scaled sigmoidal formula: (1/(1+exp(a*(b-u))) - 1/(1+exp(a*b)))
          *                           /
          *                           (1/(1+exp(a*(b-1))) - 1/(1+exp(a*b)))
-	 *
-	 * "+0.5" below is to round by casting.
+         *
+     	 * Nicolas is still trying to figure out what the "+0.5" is for.
          */
         sigmoidal_map[i]=(MagickRealType) ScaleMapToQuantum((MagickRealType)
           (MaxMap*((uu-u0)/(u1-u0))+0.5));

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svn co https://subversion.imagemagick.org/subversion/ImageMagick/branches/ImageMagick-6/ IM6

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cd IM6
svn diff -r 8805:8813 Changelog
svn: 'Changelog' is not under version control