I try to use picker in ImageViewer2 which reade seriesof DICOMImage.
But It seems picker->pick not work as the return value by pick is always zeor.
The example I follow is using a 2d Image, while DICOMImage is a Series.
https://kitware.github.io/vtk-examples/site/Cxx/Images/PickPixel/
https://kitware.github.io/vtk-examples/site/Cxx/IO/ReadDICOMSeries/
So I wonder which of picker and pick function should i used when read a 2D (not 2d) Image?