72 search results - page 4 / 15 » Camera Calibration and Light Source Estimation from Images w... |
CVPR
1999
IEEE
14 years 9 months ago
1999
IEEE
This paper describes a system that uses a camera and a point light source to track a user's hand in three dimensions. Using depth cues obtained from projections of the hand a...
CVPR
2008
IEEE
14 years 9 months ago
2008
IEEE
We present a theoretical analysis for characterizing the shadows cast by a point light source given its relative position to the camera. In particular, we analyze the epipolar geo...
ICCV
2001
IEEE
14 years 9 months ago
2001
IEEE
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...
ECCV
2002
Springer
14 years 9 months ago
2002
Springer
Illumination conditions cause problems for many computer vision algorithms. Inparticular, shadows in an image can cause segmentation, tracking, or recognition algorithms to fail. I...
ECCV
2008
Springer
14 years 9 months ago
2008
Springer
Using only shadow trajectories of stationary objects in a scene, we demonstrate that using a set of six or more photographs are sufficient to accurately calibrate the camera. Moreo...