Stereo

Question 1

What assumptions are often used in stereo imaging?

Answer 1

Identical focal lengths

Two cameras have parallel optical axes

The two cameras are aligned so disparities always occur in the same row of the images

Question 2

What is the equation for finding the distance of an objet with two cameras, and what do we need to know?

Answer 2

Z = fB / (xL - xR)
Need to know physical size of pixels

Question 3

What do you have to be careful to do with positions of calculated objects in stereo?

Answer 3

Make sure the origin is correct, so:
x’ = image x location - half image size in x

y’ = half image size in y - image y location