| Vanishing points and
projection matrix |
| = vx (X
vanishing point) |
| = |
| = |
| similarly, |
| v |
| v |
| π |
| , |
| π |
| Y |
| Z |
| Not So Fast! We only know v’s up to a scale
factor |
|
|
|
| • | Can fully specify
by providing 3 reference points |
|