DocumentCode :
3018724
Title :
A new approach of photometric stereo from linear image representation under close lighting
Author :
Sakaue, Fumihiko ; Sato, Jun
Author_Institution :
Nagoya Inst. of Technol., Nagoya, Japan
fYear :
2011
fDate :
6-13 Nov. 2011
Firstpage :
759
Lastpage :
766
Abstract :
In this paper, we propose a novel method for shape from shading and representing intensity images of objects illuminated by near point light sources, where the distance between a light source and an object is small. Our image representation model is a linear model, and thus, the computational cost for analyzing intensity images is very small comparing with the non-linear model. We introduce an intensity projection matrix, and show that this matrix realizes the linear representation of near light source images. Furthermore, we propose a method for estimating the intensity projection matrices reliably. Finally, we derive a multilinear constraint from the intensity projection matrices, which enables us to generate images under arbitrary near light sources from 4 basis intensities linearly. The experimental results show that the proposed method can generate much more accurate images under near light sources than the traditional linear intensity model defined under infinite light source.
Keywords :
image representation; lighting; matrix algebra; photometric light sources; stereo image processing; close lighting; intensity image representation; intensity projection matrix; linear image representation model; multilinear constraint; near point light sources; object illumination; photometric stereo approach; Equations; Image representation; Light sources; Lighting; Shape; Tensile stress; Three dimensional displays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Vision Workshops (ICCV Workshops), 2011 IEEE International Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4673-0062-9
Type :
conf
DOI :
10.1109/ICCVW.2011.6130329
Filename :
6130329
Link To Document :
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