Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

11-2007

Abstract

We present a simple and practical approach for segmenting un-occluded items in a scene by actively casting shadows. By ‘items’, we refer to objects (or part of objects) enclosed by depth edges. Our approach utilizes the fact that under varying illumination, un-occluded items will cast shadows on occluded items or background, but will not be shadowed themselves.We employ an active illumination approach by taking multiple images under different illumination directions, with illumination source close to the camera. Our approach ignores the texture edges in the scene and uses only the shadow and silhouette information to determine the occlusions. We show that such a segmentation does not require the estimation of a depth map or 3D information, which can be cumbersome, expensive and often fails due to the lack of texture and presence of specular objects in the scene. Our approach can handle complex scenes with self-shadows and specularities. Results on several real scenes along with the analysis of failure cases are presented.

Keywords

Closed Contour, Shadow Region, Ratio Image, Complex Scene, Cast Shadow

Discipline

Computer Engineering

Research Areas

Data Science and Engineering

Publication

Proceedings of the 8th Asian Conference on Computer Vision, Tokyo, Japan, 2007 November 18 - 22

Volume

4843

First Page

945

Last Page

955

ISBN

9783540763857

Identifier

10.1007/978-3-540-76386-4_90

Publisher

Springer, Berlin, Heidelberg

City or Country

Tokyo, Japan

Additional URL

https://doi.org/10.1007/978-3-540-76386-4_90

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