(for computer vision)

**Stan Birchfield**

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** Erratum ** In Section 2.1.3, "The
unit sphere," it is stated that the projective plane is topologically
equivalent to a sphere. In fact, it is only *locally* topologically
equivalent to a sphere, as pointed out by
John D. McCarthy.

- Introduction
- The Projective Plane
- Projective Space
- Projective Geometry Applied to Computer Vision
- Demonstration of Cross Ratio in
- Acknowledgment
- Bibliography
- About this document ...