LinAlgError during training about sfmlearner-pytorch

[ClementPinard]

This error is triggered when your intrinsics matrix is not Invertible. Intrinsics matrix usually are in the form of

[[fx, 0, cx]
 [0, fy, cy]
 [0,  0,  1]]

so it should not happen. How did you preprocess your KITTI dataset ? do you have a sample of cam.txt from your dataset ?

[MatthewLee11]

@ClementPinard Thank you for your answer. I checked the cam.txt and found the value of intrinsics is 0.000000,0.,0.000000,0.,0.000000,0.000000,0.,0.,1. and I don't know why. Is it because I use python2.7 instead of python3? I will install PyTorch based on python3 and try again to see if it's the reason. Thank you.

[MatthewLee11]

@ClementPinard I solved the problem. It's just because of the version of python. Thank you very much!

[ClementPinard]

thanks for your insight ! does it mean that running data preprocessing script with python 2.7 ? I'm curious about what went wrong :)

[MatthewLee11]

@ClementPinard I'm so sorry that I didn't log on to GitHub these days. Your guessing is right. I use python 2.7 to run data preprocessing script and met the problem.

[MatthewLee11]

@ClementPinard When I used python3.6 to run the scripy, I solved the problem.