Hi Lassoan,
Below is some updates.
"You can edit segmentations in Segment Editor module with various tools. Is there some operation that you cannot do in the Segment Editor?"
[Yes,we want to save the modified masks into a json file which can be inputted as a argument when computing Radiomics by a exe file;]
"Why do you create polydata manually? Segmentation node can provide you closed surface representation as shown here."
[This polydata = vtk.vtkMarchingCubes().GetOutput(),will be used to modelNode.SetAndObservePolyData(polydata) ,then loaded into segmentationNode by ImportModelToSegmentationNode(modelNode, segmentationNode).]
"You still have the binary labelmap representation in the segmentation. Why do you import the segment?"
[I am not sure when this binary labelmap representation has been created.In our logic,this binary labelmap representation was got from segmentationNode.GetBinaryLabelmapRepresentation(segmentID) at last step,since we have to get each segment’s mask after all of segments have been added,and save those masks into json file.Pls correct me if I am wrong.]
"if you use vtkDiscreteMarchingCubes then it should be possible to convert without losing information, but the result is just a cube for each voxel, so the vtkDiscreteMarchingCubes output is not usable for much."
[We have changed to this method: create a vtkImageData to save mask values firstly–>then convert it to vtkOrientedImageData–>ImportLabelmapToSegmentationNode(vtkOrientedImageData, segmentationNode)–>segmentationNode.GetBinaryLabelmapRepresentation(eachSegmentID)—>Output masks.
And the result (mask value) is same with original one.]
Thanks，
Chunbo