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.
|Original language||American English|
|Title of host publication||Proceedings - 7th Pacific Conference on Computer Graphics and Applications, Pacific Graphics 1999|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||9|
|ISBN (Print)||0769502938, 9780769502939|
|State||Published - 1999|
|Event||7th Pacific Conference on Computer Graphics and Applications, Pacific Graphics 1999 - Seoul, Korea, Republic of|
Duration: 5 Oct 1999 → 7 Oct 1999
|Name||Proceedings - 7th Pacific Conference on Computer Graphics and Applications, Pacific Graphics 1999|
|Conference||7th Pacific Conference on Computer Graphics and Applications, Pacific Graphics 1999|
|Country/Territory||Korea, Republic of|
|Period||5/10/99 → 7/10/99|
Bibliographical noteFunding Information:
This work was supported by a grant from the Israeli Ministry of Science.
© 1999 IEEE.