DocumentCode
1748612
Title
Shadow carving
Author
Savarese, Silvio ; Rushmeier, Holly ; Bernardini, Fausto ; Perona, Pietro
Author_Institution
California Inst. of Technol., Pasadena, CA, USA
Volume
1
fYear
2001
fDate
2001
Firstpage
190
Abstract
The shape of an object may be estimated by observing the shadows on its surface. We present a method that is robust with respect to a conservative classification of shadow regions. Assuming that a conservative estimate of the object shape is available, we analyze images of the object illuminated with known point light sources taken from known camera locations. We adjust our surface estimate using the shadow regions to produce a refinement that is still a conservative estimate. A proof of correctness is provided. No assumptions about the object topology are made, although any tangent plane discontinuities over the object´s surface are supposed to be detectable. An implementation and some experimental results are presented
Keywords
image classification; image processing; camera locations; classification; point light sources; shadow carving; shadow regions; surface estimate; Cameras; Image analysis; Light sources; Object detection; Optical collimators; Pixel; Robustness; Shape; Surface texture; Topology;
fLanguage
English
Publisher
ieee
Conference_Titel
Computer Vision, 2001. ICCV 2001. Proceedings. Eighth IEEE International Conference on
Conference_Location
Vancouver, BC
Print_ISBN
0-7695-1143-0
Type
conf
DOI
10.1109/ICCV.2001.937517
Filename
937517
Link To Document