Relative viewing distance: A correspondence invariance under paraperspective projection
Publication in refereed journal

香港中文大學研究人員

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替代計量分析
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摘要In an earlier work by B. M. Bennett et al. (J. Opt. Soc. Amer. A 6, 1989, 10521069), an algebraic condition for four point pairs in two images to be projections from a rigid object was proposed. The condition was derived under the assumption that the images are projected orthographically from exactly the same viewing distance. This paper presents how the condition can be generalized for a more general viewing geometry: the two images are projected from different viewing distances and even under independent paraperspective projections. It turns out the generalized rigidity condition becomes a determination of the ratio of the cameras' viewing distances. The ratio depends only on the spatial relationships between the two viewpoints and the observed object, not on the choice of correspondences over the object. It is thus an invariant and can be helpful toward solving the correspondence problem in multiview vision cues including those based on motion and stereo parallax. This paper also shows how the rigidity condition is related to the well-known epipolar condition. Empirical studies and real image experiments are shown to illustrate the validity of the results. (C) 2002 Elsevier Science (USA).
著者Chung R
期刊名稱Computer Vision and Image Understanding
出版年份2002
月份4
日期1
卷號86
期次1
出版社ACADEMIC PRESS INC ELSEVIER SCIENCE
頁次1 - 31
國際標準期刊號1077-3142
電子國際標準期刊號1090-235X
語言英式英語
關鍵詞epipolar constraint; paraperspective projection; rigidity condition
Web of Science 學科類別Computer Science; Computer Science, Artificial Intelligence; COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE; Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC

上次更新時間 2021-22-06 於 23:59