# Do epipolar lines intersect?

Consider a setup where we have two cameras as described below in the image:

There are 3 points p,q and r in the left camera's image plane. If we find the epipolar lines in the right image plane, would they intersect at some point?

I think the answer is yes they would intersect and the reason is that all three points use the base line (vector from $C_l$ to $C_r$) in the epipolar plane which is formed using the vector from the camera to the point in the image plane.

Since they share the same base line, each epipolar line would pass through the "edge" of the image plane and that is where they would intersect.

Is it possible that they won't intersect , if so why?

• You are correct. They will intersect. – MathGuy Dec 14 '16 at 21:13