Computing Visibility for Triangulated Panoramas

Fu, Chi-Wing; Wong, Tien-Tsin; Heng, Pheng-Ann

Computing Visibility for Triangulated Panoramas

Files

161-174.pdf (4.3 MB)

Date

1999

Authors

Fu, Chi-Wing
Wong, Tien-Tsin
Heng, Pheng-Ann

Publisher

The Eurographics Association

Abstract

A visibility algorithm for triangulated panoramas is proposed. The algorithm can correctly resolve the visibility without making use of any depth information. It is especially useful when depth information is not available, such as in the case of real-world photographs. Based on the optical flow information and the image intensity, the panorama is subdivided into variable-sized triangles, image warping is then efficiently applied on these triangles using existing graphics hardware. The visibility problem is resolved by drawing the warped triangles in a specific order. This drawing order is derived from epipolar geometry. Using this partial drawing order, a graph can be built and topological sorting is applied on the graph to obtain the complete drawing order of all triangles. We will show that the time complexity of graph construction and topological sorting are both linear to the total number of triangles.

        @inproceedings{:10.2312/EGWR/EGWR99/161-174
,
booktitle = {Eurographics Workshop on Rendering
},
editor = {Dani Lischinski and Greg Ward Larson
},
title = {{Computing Visibility for Triangulated Panoramas
}},
author = {Fu, Chi-Wing and 
Wong, Tien-Tsin and 
Heng, Pheng-Ann
},
year = {1999
},
publisher = {The Eurographics Association
},
ISSN = {1727-3463
},
ISBN = {3-211-83382-X
},
DOI = {/10.2312/EGWR/EGWR99/161-174
}
}