Avoid Lab L values which lead to negative Y values when converting Lab to XYZ, fixes #4334

2018-01-25 21:27:10 +01:00
parent c0ceeb2c95
commit 83bc6140bd
1 changed files with 1 additions and 1 deletions
--- a/rtengine/iplocalcontrast.cc
+++ b/rtengine/iplocalcontrast.cc
@@ -62,7 +62,7 @@ void ImProcFunctions::localContrast(LabImage *lab)
                bufval *= (bufval > 0.f) ? light : dark;
            }
-            lab->L[y][x] += bufval;
+            lab->L[y][x] = std::max(0.0001f, lab->L[y][x] + bufval);
        }
    }
 }