Got alpha NaN in PBA-GPU

[TroiiF]

Hello, I use COLMAP with PBA in GPU to SfM, but there is a problem. When the number of image increases to about 400, the reconstruction becomes bad and the global BA works for the first iteration then throws "alpha=NaN" in next iterations. Is this caused by the single precision convertion or bad reconstruction?

[ghost]

Same problem here. Have you @TroiiF got any solutions?

[TroiiF]

Same problem here. Have you @TroiiF got any solutions?

Nada. The author said it's not recommanded to use PBA if the points is over 100,000. So maybe PBA is not robust in these circumstances...