DocumentCode :
3298849
Title :
Automatic camera placement for image-based modeling
Author :
Fleishman, Shachar ; Cohen-Or, Daniel ; Lischinski, Dani
Author_Institution :
Dept. of Comput. Sci., Tel Aviv Univ., Israel
fYear :
1999
fDate :
1999
Firstpage :
12
Abstract :
We present an automatic camera placement method for generating image-based models from scenes with known geometry. Our method first approximately determines the set of surfaces visible from a given viewing area and then selects a small set of appropriate camera positions to sample the scene from. We define a quality measure for a surface as seen, or covered, from the given viewing area. Along with each camera position, we store the set of surfaces which are best covered by this camera. Next, one reference view is generated from each reference view that do not belong to the selected set of polygons are masked out. The image-based model generated by our method, covers every visible surface only once, associating it with a camera position from which it is covered with quality that exceeds a user-specified quality threshold. The result is a compact non-redundant image-based model with controlled quality. The problem of covering every visible surface with a minimum number of cameras (guards) can be regarded as an extension to the well-known Art Gallery Problem. However, since the 3D polygonal model is textured, the camera-polygon visibility relation is not binary; instead, it has a weight-the quality of the polygon´s coverage
Keywords :
computational geometry; rendering (computer graphics); solid modelling; 3D polygonal model; Art Gallery Problem; automatic camera placement; camera-polygon visibility relation; compact nonredundant image-based model; controlled quality; image-based modeling; polygons; quality measure; reference view; user-specified quality threshold; Area measurement; Cameras; Computational geometry; Computer science; Image generation; Image sampling; Layout; Read only memory; Rendering (computer graphics); Solid modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Graphics and Applications, 1999. Proceedings. Seventh Pacific Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7695-0293-8
Type :
conf
DOI :
10.1109/PCCGA.1999.803344
Filename :
803344
Link To Document :
بازگشت