{"type":"ScholarlyArticle","title":"A New Method of 3-D Motion Analysis Using a Concept of Projective Geometry","authors":[{"name":"Tadahiro Kitahashi","slug":"tadahiro-kitahashi","given":"Tadahiro","family":"Kitahashi","affiliation":""},{"name":"Hiroyuki Endo","slug":"hiroyuki-endo","given":"Hiroyuki","family":"Endo","affiliation":""}],"abstract":"This paper describe s a method of interpreting three dimensional motion of an object by making use of rigidity assurnption and orientation of its edge . We employ a vanishing point to determine the o rient a tion. We propese a new idea of using cross ratio, i.e . one of the mo st fundament a l concepts in pr o jective ge o metry to find a vanish ing point of a line. This a ll ows t o calculate the l oca ti o n of a van i s hing point with a known seq uence of p o int s on it withovc another parallel line required by the conventional meth od .","doi":null,"url":"https://ijcai.org/proceedings/1985/181","pdf":"https://ijcai.org/proceedings/1985/0181.pdf","markdown":"https://ijcai.org/proceedings/1985/181.md","bibtex":"https://ijcai.org/proceedings/1985/bibtex/181","volume":{"slug":"1985","title":"Proceedings of the Ninth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 1985","url":"https://ijcai.org/proceedings/1985/","year":1985,"location":"Los Angeles, California, USA","dates":"","editors":"Aravind Joshi","isbn":"","publisher":"International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":"Perception","track":"Perception","number":181,"pages":{"first":902,"last":903},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}