Correct wegith computation from correlation metric

ocommowi · ocommowi · commit c641f61cf41c · 2022-07-11T11:30:43.000+02:00
diff --git a/Anima/registration/algorithms/animaAnatomicalBlockMatcher.hxx b/Anima/registration/algorithms/animaAnatomicalBlockMatcher.hxx
@@ -91,7 +91,10 @@ AnatomicalBlockMatcher<TInputImageType>
             return 1;
 
         case Correlation:
-            return (val > 0) ?  val : 0;
+        {
+            double weight = (val > 0) ?  val : 0;
+            return (weight + 1) / 2.0;
+        }
 
         case SquaredCorrelation:
         default:
diff --git a/Anima/registration/algorithms/animaDistortionCorrectionBlockMatcher.hxx b/Anima/registration/algorithms/animaDistortionCorrectionBlockMatcher.hxx
@@ -166,7 +166,8 @@ DistortionCorrectionBlockMatcher<TInputImageType>
             similarityWeight = 1;
 
         case Correlation:
-            similarityWeight = (val + 1) / 2.0;
+            similarityWeight = (val > 0) ? val : 0;
+            similarityWeight = (similarityWeight + 1) / 2.0;
 
         case SquaredCorrelation:
         default:
