I implemented a Shape Detection as it's described in ShapeDetectionLevelSetFilter.cxx in the example folder and it works fine. By accident, I controlled the output of the integrated sigmoid filter, by using an itkImageFileWriter and by using a vtkImageViewer2 (via itkImageToVTKImageFilter.txx). I found out that while the file writer shows the correct sigmoid picture, the image viewer shows just a black output. I even looked at the pixels by using an itkImageRegionIterator and all of them seem to be zero?!<br>
<br>How is that possible? Is that usual behavior? Who should I trust?<br>