3d reconstruction from 2 images without info about the camera

Question

I\'m new in this field and I\'m trying to model a simple scene in 3d out of 2d images and I dont have any info about cameras. I know that there are 3 options:

Answer 1

I think you need to use StereoRectify to rectify your images and get Q. This function needs two parameters (R and T) the rotation and translation between two cameras. So you can compute the parameters using solvePnP. This function needs some 3d real coordinates of the certain object and 2d points in images and their corresponding points