# homography

Definition from Wiktionary, the free dictionary

## English[edit]

### Etymology[edit]

### Pronunciation[edit]

- (Received Pronunciation) enPR: hōmŏʹgrəfĭ, IPA
^{(key)}: /həʊˈmɒɡɹəfɪ/ - (US) IPA
^{(key)}: /hoʊˈmɒɡrəfi/

### Noun[edit]

**homography** (*countable and uncountable*, *plural* **homographies**)

- The state or quality of being spelt homographically; the state or quality of existing as homographs.
- (geometry) An invertible transformation from a projective space to itself that maps straight lines to straight lines.
*A***homography**on a real projective plane can be specified by a mapping from one set of four non-collinear points to another set of four non-collinear points. Given such a specification, then the 3-by-3**homography**matrix may be computed by means of the DLT (Direct Linear Transformation) algorithm.