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library for 2d homographies

The 3x3 homography transformation matrix for transformations in two dimensions is illustrated below.

| x0 |   | a  b  c | | x |
| y0 | = | d  e  f | | y |
| z0 |   | g  h  1 | | 1 |

x' = x0 / z0 y' = y0 / z0

For documentation, visit the homography project page