BUG : as image now have an unsigned spacing and a signed direction, we need to...

BUG : as image now have an unsigned spacing and a signed direction, we need to set spacing AND direction parameters if using itk filter, here we use the itk gradient filter

Modules/Feature/Descriptors/test/otbHistogramOfOrientedGradientCovariantImageFunction.cxx

@@ -60,6 +60,7 @@ int otbHistogramOfOrientedGradientCovariantImageFunction(int itkNotUsed(argc), c
   GradientFilterType::Pointer gradient = GradientFilterType::New();
   gradient->SetInput(reader->GetOutput());
   gradient->SetUseImageSpacing(false);
+  gradient->SetUseImageDirection(false);
   gradient->Update();
 
   // Instantiating object