different between horography vs homography

English

Etymology

From Ancient Greek [Term?] (“hour”) + -graphy. Compare French horographie.

Noun

horography (uncountable)

1. (historical) local history (in Ancient Greece) that involved the description of events
2. The art of constructing dials or instruments for indicating the hours.

English

Etymology

homo- +? -graphy

Pronunciation

• (Received Pronunciation) enPR: h?m??gr?f?, IPA^(key): /h???m????f?/
• (US) IPA^(key): /ho??m????fi/
• Rhymes: -????fi

Noun

homography (countable and uncountable, plural homographies)

1. The state or quality of being spelt homographically; the state or quality of existing as homographs.
2. (geometry) An isomorphism between projective spaces 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.

   Synonyms: projectivity, projective transformation, projective collineation

   Hypernym: collineation

   Hyponyms: linear fractional transformation, Möbius transformation

Related terms

• heterography, homeography