**Properties:**

- Preserves straight lines and cross ratios
- Illustration of perspectivity
- Projective mappings of lines and conics in
- The affine subgroup
- The Euclidean subgroup
- Decomposition of a projective transformation
- Affine calibration of a plane
- Euclidean calibration of a plane
- How to compute a homography

Subhashis Banerjee 2008-01-20