Line Profile - 2D image

Support
1

Hello,

I have been using Dr. Lasso’s Line Profile and it has worked well for a 3D CT volume. However, when analyzing a 2D image, I kept getting a line of zeros. I am wondering if this is because each coordinate of the line/ruler is three-dimensional and there might be a mismatch in the third direction perpendicular to the image plane?

Also, I think Line Profile is a useful tool that should be included in Kitware. Please let me know how I can help with this process!

Thank you,

Preston

2

There are a few implementations of this module. Did you use the one in the “Sandbox” extension?

3

VTK has trouble probing a single-slice volume. I’ve asked for advice on the VTK forum.

4

Yes, I am using the Sandbox extension. I am reading through the vtk forum you linked to. I am a beginning to vtk, so would you mind directing me to the right function to look at/modify if I were to get profiles of individual slices?

5

Hi -

Were you able to find a solution? I am encountering the same problem.

7

This problem turned out to be caused by a fundamental error in VTK (in how image boundaries are misinterpreted by vtkProbeFilter). I’ve made point probing more robust, which should fix this issue in releases downloaded tomorrow or later.

8

Hi Andras - I’m using the “Sandbox” extension, if I re-download the extension tomorrow or later it should be okay?

9

Yes. The extension is updated each night, so you can wait a day and update (or uninstall and install) it. If you don’t want to wait a day then you can modify LineProfile.py on your computer manually right now.