{"type":"ScholarlyArticle","title":"Surface-Normals from Closed Paths","authors":[{"name":"Michael J. Brooks","slug":"michael-j-brooks","given":"Michael J.","family":"Brooks","affiliation":""}],"abstract":"It is now well established that the shading present in an image of an object is a potential source of 3-D shape information. With this in mind, we seek constraints arising out of the assumption that an image portrays an object with a smooth surface, On obtaining a threshold and a depth-invariance constraint (the latter requiring integration around closed curves) we offer a method of shape from shading for the purpose of demonstrating their potential usefulness.","doi":null,"url":"https://ijcai.org/proceedings/1979/27","pdf":"https://ijcai.org/proceedings/1979/0027.pdf","markdown":"https://ijcai.org/proceedings/1979/27.md","bibtex":"https://ijcai.org/proceedings/1979/bibtex/27","volume":{"slug":"1979","title":"Proceedings of the Sixth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 1979","url":"https://ijcai.org/proceedings/1979/","year":1979,"location":"Tokyo, Japan","dates":"August 20-23, 1979","editors":"Bruce G. Buchanan","isbn":"","publisher":"International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":null,"track":"","number":27,"pages":{"first":null,"last":null},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}