Difference in distortion coefficients - MatchId, VIC3d, DICe

[evgenabaqus]

Hello DICe developers,

Thank you very much for the Software.

Here are results of stereo calibration using MatchID , VIC3D, and DICe. All parameters except kappa(dist. coefficient) look similar. Why distortion coefficients are so different?

And another question: In ParaView (5.8.0 (windows 10x64)) I cant see displacement/deformation in my model. I use checkbox [Apply Displacements] , and even after I increase Displacement magnitude x10-x100 - still there is no deformation or displacement in model. (Yes, I can see results , but want to see real displacement/deformation in my model - is it possible?)

Thanks EV

p.s. Are you planning new release?)

[dicengine]

The distortion coefficients are according to the distortion model used in each code. DICe doesn't have it's own camera calibration routines, it simply wraps the OpenCV routines. Check out the OpenCV distortion model and compare it to VIC3D's and MatchID's to see what the parameters are different.

Regarding the displacements, if you are doing stereo DIC, you have to set the displacement field in ParaView to MODEL_DISPLACEMENTS to see the deformation.

There is a new release planned soon, this new release has built in visualization of the results so you don't have to use ParaView anymore. There will likely be a pre-release version to use for more testing prior to the 3.0 release which will follow.