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Compact local color descriptor based on quaternion principle component analysis

[+] Author Affiliations
Qiang Wang, Zhengzhi Wang

Mechatronics and Automation School of National University of Defense Technology, Changsha, Hunan Province 410073, China

J. Electron. Imaging. 22(3), 033021 (Aug 30, 2013). doi:10.1117/1.JEI.22.3.033021
History: Received September 11, 2012; Revised June 25, 2013; Accepted July 22, 2013
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Abstract.  In order to improve discriminative power and illumination invariance, local color descriptors have been proposed. However, the high dimensionality of color descriptor limits the performance of matching in terms of speed. It is desirable to reduce the dimensionality for efficient computation and compact representation. A compaction of color descriptor is presented. The color feature vector is represented as a quaternion vector and then projected into a precomputed eigenspace. The resulting descriptor is highly compact and the experimental results show that the performance is almost identical to that of the standard RGB-SIFT.

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Qiang Wang and Zhengzhi Wang
"Compact local color descriptor based on quaternion principle component analysis", J. Electron. Imaging. 22(3), 033021 (Aug 30, 2013). ; http://dx.doi.org/10.1117/1.JEI.22.3.033021


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