How to calculate the angle from rotation matrix
I am using two image of the single object the object is roated certain degree from its first image. I have calculated the POSE of each image and converted the rotational vector to Matrix using Rodergues(). Now how do I calculate and see how much it is rotated from its first position? I have tried many ways but answers was no were close EDIT: My camera is fixed only the object is moving. Krish We can get Euler angles from rotation matrix using following formula. Given a 3×3 rotation matrix The 3 Euler angles are Here atan2 is the same arc tangent function, with quadrant checking, you typically