A rate-efficient approach for establishing visual correspondences via distributed source coding.

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SPIE Visual Communications and Image Processing. 2008 Jan 28

Yeo C, Ahammad P, Ramchandran K

Note: Research in this publication was not performed at Janelia.

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Abstract

We consider the problem of communicating compact descriptors for the purpose of establishing visual correspondences between two cameras operating under rate constraints. Establishing visual correspondences is a critical step before other tasks such as camera calibration or object recognition can be performed in a network of cameras. We verify that descriptors of regions which are in correspondence are highly correlated, and propose the use of distributed source coding to reduce the bandwidth needed for transmitting descriptors required to establish correspondence. Our experiments demonstrate that the proposed scheme is able to provide compression gains of 57% with minimal loss in the number of correctly established correspondences compared to a scheme that communicates the entire image of the scene losslessly in compressed form. Over a wide range of rates, the proposed scheme also provides superior performance when compared to simply transmitting all the feature descriptors.

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A rate-efficient approach for establishing visual correspondences via distributed source coding.

Note: Research in this publication was not performed at Janelia.

Abstract