Adaptive least squares prediction for stereo image coding

Lucas, Luis F. R.; M. M. Rodrigues, Nuno; Silva, Eduardo A. B. da; Faria, Sergio

http://hdl.handle.net/10400.8/14499

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Authors

Lucas, Luis F. R.

M. M. Rodrigues, Nuno

Silva, Eduardo A. B. da

Faria, Sergio

Abstract(s)

State-of-the art approaches towards stereo image coding exploit inter-view redundancy by employing block-matching methods for disparity estimation and compensation. However, the efficiency of these methods is affected by mismatched areas, due to occlusions, brightness variations, or perspective distortion between objects of the two views. In this paper we present a new prediction scheme for stereo image coding, that combines an implicit disparity estimation method, with an adaptive least squares (LS)-based filtering. The Multidimensional Multiscale Parser image coding algorithm was used to evaluate the efficiency of the proposed scheme. Experimental results demonstrate the advantage of LS prediction in stereo image coding. Furthermore, the rate-distortion performance of the MMP based stereo encoder is well above that of the state-of-the-art H.264/AVC Stereo Profile, especially at medium and high bit rates.