Hi Alexey,
Thanks for your quick reply. I added a step to remove the projections related to the cameras for which I reset alignment. Without this step it seems that aligning the cameras again does not produce proper results (I think the points resulting from the first cameras alignment are still taken into account).
I now get satisfying results, but the processing time seems to be quite long (several minutes) compared to just clicking on "reset alignment" (about one second!). Is there a faster method that I'm missing here ?
Thx!