X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=tools%2FclitkAffineTransformGenericFilter.txx;h=ef81fe2d464bc7082ed42a8f2d9ae1d5856ea3dc;hb=323952cc3c1cc5d0e4f21dd9ac74736207cc544a;hp=5a8cfa964e144132560fbc080da28ae903c67937;hpb=765020625fbc092d283e221e36c83e60a1844cb7;p=clitk.git

diff --git a/tools/clitkAffineTransformGenericFilter.txx b/tools/clitkAffineTransformGenericFilter.txx
index 5a8cfa9..ef81fe2 100644
--- a/tools/clitkAffineTransformGenericFilter.txx
+++ b/tools/clitkAffineTransformGenericFilter.txx
@@ -163,6 +163,46 @@ AffineTransformGenericFilter<args_info_type>::UpdateWithDimAndPixelType()
     likeReader->SetFileName(m_ArgsInfo.like_arg);
     likeReader->Update();
     resampler->SetOutputParametersFromImage(likeReader->GetOutput());
+  } else if(m_ArgsInfo.transform_grid_flag) {
+    typename itk::Matrix<double, Dimension+1, Dimension+1> invMatrix( matrix.GetInverse() );
+    typename itk::Matrix<double, Dimension, Dimension> invRotMatrix( clitk::GetRotationalPartMatrix(invMatrix) );
+    typename itk::Vector<double,Dimension> invTrans =  clitk::GetTranslationPartMatrix(invMatrix);
+
+    // Spacing is influenced by affine transform matrix and input direction
+    typename InputImageType::SpacingType outputSpacing;
+    outputSpacing = invRotMatrix *
+                    input->GetDirection() *
+                    input->GetSpacing();
+
+    // Origin is influenced by translation but not by input direction
+    typename InputImageType::PointType outputOrigin;
+    outputOrigin = invRotMatrix *
+                   input->GetOrigin() +
+                   invTrans;
+
+    // Size is influenced by affine transform matrix and input direction
+    // Size is converted to double, transformed and converted back to size type.
+    vnl_vector<double> vnlOutputSize(Dimension);
+    for(unsigned int i=0; i< Dimension; i++) {
+      vnlOutputSize[i] = input->GetLargestPossibleRegion().GetSize()[i];
+    }
+    vnlOutputSize = invRotMatrix *
+                    input->GetDirection().GetVnlMatrix() *
+                    vnlOutputSize;
+    typename OutputImageType::SizeType outputSize;
+    for(unsigned int i=0; i< Dimension; i++) {
+      // If the size is negative, we have a flip and we must modify
+      // the origin and the spacing accordingly.
+      if(vnlOutputSize[i]<0.) {
+        vnlOutputSize[i] *= -1.;
+        outputOrigin[i] = outputOrigin[i] + outputSpacing[i] * (vnlOutputSize[i]-1);
+        outputSpacing[i] *= -1.;
+      }
+      outputSize[i] = lrint(vnlOutputSize[i]);
+    }
+    resampler->SetSize( outputSize );
+    resampler->SetOutputSpacing( outputSpacing );
+    resampler->SetOutputOrigin( outputOrigin );
   } else {
     //Size
     typename OutputImageType::SizeType outputSize;
@@ -170,7 +210,6 @@ AffineTransformGenericFilter<args_info_type>::UpdateWithDimAndPixelType()
       for(unsigned int i=0; i< Dimension; i++)
         outputSize[i]=m_ArgsInfo.size_arg[i];
     } else outputSize=input->GetLargestPossibleRegion().GetSize();
-    std::cout<<"Setting the size to "<<outputSize<<"..."<<std::endl;
 
     //Spacing
     typename OutputImageType::SpacingType outputSpacing;
@@ -178,7 +217,6 @@ AffineTransformGenericFilter<args_info_type>::UpdateWithDimAndPixelType()
       for(unsigned int i=0; i< Dimension; i++)
         outputSpacing[i]=m_ArgsInfo.spacing_arg[i];
     } else outputSpacing=input->GetSpacing();
-    std::cout<<"Setting the spacing to "<<outputSpacing<<"..."<<std::endl;
 
     //Origin
     typename OutputImageType::PointType outputOrigin;
@@ -186,7 +224,6 @@ AffineTransformGenericFilter<args_info_type>::UpdateWithDimAndPixelType()
       for(unsigned int i=0; i< Dimension; i++)
         outputOrigin[i]=m_ArgsInfo.origin_arg[i];
     } else outputOrigin=input->GetOrigin();
-    std::cout<<"Setting the origin to "<<outputOrigin<<"..."<<std::endl;
 
     // Set
     resampler->SetSize( outputSize );
@@ -195,6 +232,12 @@ AffineTransformGenericFilter<args_info_type>::UpdateWithDimAndPixelType()
 
   }
 
+  if (m_ArgsInfo.verbose_flag) {
+    std::cout << "Setting the output size to " << resampler->GetSize() << "..." << std::endl;
+    std::cout << "Setting the output spacing to " << resampler->GetOutputSpacing() << "..." << std::endl;
+    std::cout << "Setting the output origin to " << resampler->GetOutputOrigin() << "..." << std::endl;
+  }
+
   resampler->SetInput( input );
   resampler->SetTransform( affineTransform );
   resampler->SetInterpolator( genericInterpolator->GetInterpolatorPointer());