From: cristy <urban-warrior@git.imagemagick.org>
Date: Thu, 22 Apr 2010 23:42:02 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~9603
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0336d6d21c0a6f8364b11a4baa79b116762a54a0;p=imagemagick

---

diff --git a/magick/colorspace.c b/magick/colorspace.c
index 04e8088a1..3a85abca8 100644
--- a/magick/colorspace.c
+++ b/magick/colorspace.c
@@ -149,8 +149,12 @@ static inline void ConvertXYZToLab(const double X,const double Y,const double Z,
   else
     z=(7.787037*z)+(16.0/116.0);
   *L=((116.0*y)-16.0)/100.0;
-  *a=0.5*(500.0*(x-y))/100.0+1.0;
-  *b=0.5*(200.0*(y-z))/100.0+1.0;
+  *a=(500.0*(x-y))/255.0;
+  if (*a < 0.0)
+    *a+=1.0;
+  *b=(200.0*(y-z))/255.0;
+  if (*b < 0.0)
+    *b+=1.0;
 }
 
 MagickExport MagickBooleanType RGBTransformImage(Image *image,