NDLI: Illumination transition image: Parameter-based illumination estimation and re-rendering

Content Provider	IEEE Xplore Digital Library
Author	Jianyi Liu Nanning Zheng Lei Xiong Gaofeng Meng Shaoyi Du
Copyright Year	2008
Description	Author affiliation: Inst. of Artificial Intell. & Robot., Xian Jiaotong Univ., Xi'an (Jianyi Liu; Nanning Zheng; Lei Xiong; Gaofeng Meng; Shaoyi Du)
Abstract	Varying illumination condition is a challenging problem for face recognition and synthesis. The illumination re-rendering technique allows aligning the illumination effects of facial images or relighting them as expected. In this paper, we propose an improved illumination re-rendering method based on more accurate mapping of facial images in the parametric illumination space. This will make the parameter-based illumination alignment more reliable. A clustering-based criterion is designed to evaluate its parameter estimation precision. To guide the image re-rendering between any a parameter pair, an intermediate image called the illumination transition image (ITI) is defined to represent both the illumination variation information and the person-specific facial shape features. The extensive experimental results verify the proposed method outperforms the quotient image approach on both parameter precision and rendering quality.
Starting Page	1
Ending Page	4
File Size	1016123
Page Count	4
File Format	PDF
ISBN	9781424421749
ISSN	10514651
DOI	10.1109/ICPR.2008.4761433
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lighting Parameter estimation Face recognition Shape Light sources Rendering (computer graphics) Image recognition Image processing Artificial intelligence Intelligent robots
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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