title: Rotation matrix between two camera system
body: <p>I was trying to find the rotation matrix between two camera systems for epipolar geometry when I have the rotation matrices for each camera plane from a common coordinate system. I came upon <a href="https://stackoverflow.com/questions/5055864/finding-rotation-matrices-between-two-cameras-for-stereorectify?newreg=70556df8c30c46128cc0d6f75c632896">this</a> question where the accepted answer says to take the inverse of one and multiply with the other, I am wondering why that is?</p>