Submitted by kyoungmu on 2009, May 9 - 19:35.289 views | 0 comments | 9 votes
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Mutual Information-based Stereo Matching Combined with SIFT Descriptor in Log-chromaticity Color Space

  • Mutual Information-based Stereo Matching Combined with SIFT Descriptor in Log-chromaticity Color Space
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cv.snu.ac.kr
Radiometric variations between input images can seriously degrade the performance of stereo matching algorithms. In this situation, mutual information is a very popular and powerful measure which can find any global relationship of intensities between two input images taken from unknown sources. The mutual information-based method, however, is still ambiguous or erroneous as regards local radiometric variations, since it only accounts for global variation between images, and does not contain spatial information properly. In this paper, we present a new method based on mutual information combined with SIFT descriptor to nd correspondence for images which undergo local as well as global radiometric variations. We transform the input color images to log-chromaticity color space from which a linear relationship can be established. To incorporate spatial information in mutual information, we utilize the SIFT descriptor which includes near pixel gradient histogram to construct a joint probability in log-chromaticity color space. By combining the mutual information as an appearance measure and the SIFT descriptor as a geometric measure, we devise a robust and accurate stereo system. Experimental results show that our method is superior to the state-of-the art algorithms including conventional mutual information-based methods and window correlation methods under various radiometric changes.
Yong Seok Heo, Kyoung Mu Lee, Sang Uk Lee
CVPR - 2009
IEEE

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Keywords computer vision | CVPR 2009 | Mutual Information | SIFT | Stereo Matching |
Category Computer Science | Engineering |


Added 09 May 2009
Updated 02 Feb 2010
Type Conference
Year 2009
Where CVPR
Authors Yong Seok Heo (Seoul National University), Kyoung Mu Lee (Seoul National University), Sang Uk Lee (Seoul National University)

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