I am trying to read pictures taken using an iPhone into Pix4D. The orientation information of the images are given in YPR format. When I read these in, Pix4d shows converted OPK for each image (in the image properties). I am trying to verify if this conversion to OPK was correctly because in the rayCloud view the images are wrongly oriented or not visible at all. I am following the paper and the companion notes made available by the support team but probably I am still missing something regarding the orientation of the axes of the iPhone camera system. That is why maybe my rotation order and/or my Tb(PATB)B and TnE matrices are wrong.
Any help is greatly appreciated.