Sciweavers

ICCV
2009
IEEE

Shadow cameras: Reciprocal views from illumination masks

15 years 3 months ago
Shadow cameras: Reciprocal views from illumination masks
Scene appearance from the point of view of a light source is called a reciprocal or dual view. Since there exists a large diversity in illumination, these virtual views may be non- perspective and multi-viewpoint in nature. In this paper, we demonstrate the use of occluding masks to recover these dual views, which we term shadow cameras. We first show how to render a single reciprocal scene view by swapping the camera and light source positions. We extend this tech- nique for multiple views by building a virtual shadow cam- era array with static masks and a moving source. We also capture non-perspective views such as orthographic, cross- slit and a pushbroom variant, while introducing novel ap- plications such as converting between camera projections and removing refractive and catadioptric distortions. Fi- nally, since a shadow camera is artificial, we can manip- ulate any of its intrinsic parameters, such as camera skew, to create perspective distortions.
Sanjeev J. Koppal and Srinivasa G. Narasimhan
Added 13 Jul 2009
Updated 10 Jan 2010
Type Conference
Year 2009
Where ICCV
Authors Sanjeev J. Koppal and Srinivasa G. Narasimhan
Comments (0)