Shadow multiplexing for single camera visual hull reconstruction

Abstract

Method overview. The setup consists of multiple colored point light sources, a diffuser and a digital camera. For each light source a silhouette is extracted from the captured shadows of the scene. These silhouettes are used for visual hull reconstruction as well as image based collision detection. Abstract In this work we propose a real-time implementation for

Shadow multiplexing for real-time silhouette extraction

“…. I N } by maximizing ∆I for the constraints (4)- (6). Optimal intensity values are presented in table 1.…”

“…This work is a real-time implementation of our previously presented proof-of-concept poster about shadow multiplexing [6], applied to collision detection. In addition, a mathematical foundation, comparison with respect to the state-of-the-art and a more extensive discussion of the results are presented in this extended version.…”

Shadow multiplexing for real-time silhouette extraction

“…Therefore we proposed a technique that extracts multiple silhouettes from different views in a single image, by replacing the cameras with colored light sources and capturing the cast shadows on a diffuser [6]. This method is related to shadow carving [22] and coplanar shadowgrams [27], but instead of extracting a set of silhouettes from subsequent images, we obtain multiple silhouettes from a single image.…”