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ID 30120
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Author
Mukaigawa, Yasuhiro
Mihashi, Sadahiko
Abstract

A concept named Photometric Image-Based Rendering (PIBR) is introduced for a seamless augmented reality. The PIBR is defined as image-based rendering which covers appearance changes caused by the lighting condition changes, while Geometric Image-Based Rendering (GIBR) is defined as image-based rendering which covers appearance changes caused by the view point changes. PIBR can be applied to image synthesis to keep photometric consistency between virtual objects and real scenes in arbitrary lighting conditions. We analyze conventional IBR algorithms, and formalize PIBR within the whole IBR framework. A specific algorithm is also presented for realizing PIBR. The photometric linearization makes a controllable framework for PIBR, which consists of four processes: (1) separation of environmental illumination effects, (2) estimation of lighting directions, (3) separation of specular reflections and cast-shadows, and (4) linearization of self-shadows. After the-photometric linearization of input images, we can synthesize any realistic images which include not-only diffuse reflections but also self-shadows, cast-shadows and specular reflections. Experimental results show that realistic images can be successfully synthesized while keeping photometric consistency

Keywords
augmented reality
lighting
realistic images
rendering (computer graphics)
Note
Digital Object Identifier: 10.1109/IWAR.1999.803812
Published with permission from the copyright holder. This is the institute's copy, as published in Augmented Reality, 1999. (IWAR '99) Proceedings. 2nd IEEE and ACM International Workshop on, 20-21 Oct. 1999, Pages 115-124.
Publisher URL:http://dx.doi.org/10.1109/IWAR.1999.803812
Copyright © 1999 IEEE. All rights reserved.
Published Date
1999-10
Publication Title
Augmented Reality
Start Page
115
End Page
124
Content Type
Journal Article
language
英語
Refereed
True
DOI
Submission Path
industrial_engineering/45