Homography meaning

homography in British English (hɒˈmɒɡrəfɪ ) nounWord forms: plural -phies. geometry. a type of transformation that maps straight lines onto another plane.

1. What is a homography?
2. What is homography used for?
3. How do I find a homography?
4. What is homography in linguistics?

What is a homography?

Homography, also referred to as planar homography, is a transformation that is occurring between two planes. In other words, it is a mapping between two planar projections of an image. It is represented by a 3x3 transformation matrix in a homogenous coordinates space.

What is homography used for?

Homography is generally used to map a plane to another plane while fundamental matrix is used to calculate depths of scene structure with objects of varying depths.

How do I find a homography?

The homography can be estimated using for instance the Direct Linear Transform (DLT) algorithm (see 1 for more information). As the object is planar, the transformation between points expressed in the object frame and projected points into the image plane expressed in the normalized camera frame is a homography.

What is homography in linguistics?

Homography is when a set of words are spelled identically, but have different meanings. It is not necessary for homographic words to be pronounced the same way, which is called homophony.