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[cpPlugins.git] / lib / cpExtensions / Algorithms / GradientImageFunctionBase.hxx

diff --git a/lib/cpExtensions/Algorithms/GradientImageFunctionBase.hxx b/lib/cpExtensions/Algorithms/GradientImageFunctionBase.hxx
index 95681bd390525855af50fe8e4784e664eba28add..a858650ea2da60e6f9129ee1c8af537abd25d2c8 100644 (file)
--- a/lib/cpExtensions/Algorithms/GradientImageFunctionBase.hxx
+++ b/lib/cpExtensions/Algorithms/GradientImageFunctionBase.hxx
@@ -36,7 +36,7 @@ EvaluateAtIndex( const TIndex& i ) const
   if( eval )
     return( this->_Evaluate( i ) );
   else
-    return( TOutput( 0 ) );
+    return( TOutput( -1 ) );
 }
 
 // -------------------------------------------------------------------------