+ //--------------------------------------------------------------------
+ /* Consider an input object, slice by slice, use the point A and set
+ pixel to BG according to their position relatively to A
+ */
+ template<class ImageType>
+ typename ImageType::Pointer
+ SliceBySliceSetBackgroundFromPoints(const ImageType * input,
+ typename ImageType::PixelType BG,
+ int sliceDim,
+ std::vector<typename ImageType::PointType> & A,
+ bool removeGreaterThanXFlag,
+ bool removeGreaterThanYFlag)
+
+ {
+ // Extract slices
+ typedef typename itk::Image<typename ImageType::PixelType, ImageType::ImageDimension-1> SliceType;
+ typedef typename SliceType::Pointer SlicePointer;
+ std::vector<SlicePointer> slices;
+ clitk::ExtractSlices<ImageType>(input, sliceDim, slices);
+
+ // Start at slice that contains A
+ typename ImageType::IndexType Ap;
+
+ // Determine slice largest region
+ typename SliceType::RegionType region = slices[0]->GetLargestPossibleRegion();
+ typename SliceType::SizeType size = region.GetSize();
+ typename SliceType::IndexType index = region.GetIndex();
+
+ // Loop from slice A to slice B
+ for(uint i=0; i<A.size(); i++) {
+ input->TransformPhysicalPointToIndex(A[i], Ap);
+ uint sliceIndex = Ap[2] - input->GetLargestPossibleRegion().GetIndex()[2];
+ if ((sliceIndex < 0) || (sliceIndex >= slices.size())) {
+ continue; // do not consider this slice
+ }
+
+ // Compute region for BG
+ if (removeGreaterThanXFlag) {
+ index[0] = Ap[0];
+ size[0] = region.GetSize()[0]-(index[0]-region.GetIndex()[0]);
+ }
+ else {
+ index[0] = region.GetIndex()[0];
+ size[0] = Ap[0] - index[0];
+ }
+
+ if (removeGreaterThanYFlag) {
+ index[1] = Ap[1];
+ size[1] = region.GetSize()[1]-(index[1]-region.GetIndex()[1]);
+ }
+ else {
+ index[1] = region.GetIndex()[1];
+ size[1] = Ap[1] - index[1];
+ }
+
+ // Set region
+ region.SetSize(size);
+ region.SetIndex(index);
+
+ // Fill region with BG (simple region iterator)
+ FillRegionWithValue<SliceType>(slices[sliceIndex], BG, region);
+ // Loop
+ }
+
+ // Merge slices
+ typename ImageType::Pointer output;
+ output = clitk::JoinSlices<ImageType>(slices, input, sliceDim);
+ return output;
+ }
+ //--------------------------------------------------------------------
+
+