Pattern-based assembled DCT scheme for image coding

Zhibo Chen; Xiaozhong Xu

doi:10.1117/12.863868

4 August 2010 Pattern-based assembled DCT scheme for image coding

Zhibo Chen, Xiaozhong Xu

Proceedings Volume 7744, Visual Communications and Image Processing 2010; 77441E (2010) https://doi.org/10.1117/12.863868
Event: Visual Communications and Image Processing 2010, 2010, Huangshan, China

Abstract

A Pattern-based Assembled DCT (PADCT) scheme is proposed as a general framework to fully utilize texture structure property in images in a more feasible and flexible manner. Different patterns can be designed or extracted according to texture structures such as directionality and distribution patterns. Pixels in the block are divided into sub-partitions, followed by assembling pixels in each sub-partitions together into a compact and efficient form for the succeeding separated one dimensional transform operations, suitable DC prediction and entropy coding schemes are also introduced. PADCT has the advantages of advanced compact energy concentration, efficient usage of memory, fewer categories of one dimensional transform, and adaptability for hardware optimization. Experimental results show that the bitrate reduction over the 2-D DCT is up to 35%. It also outperforms significantly than previous typical directional transform schemes in comparison with PSNR or subjective quality.

Citation Download Citation

Zhibo Chen and Xiaozhong Xu "Pattern-based assembled DCT scheme for image coding", Proc. SPIE 7744, Visual Communications and Image Processing 2010, 77441E (4 August 2010); https://doi.org/10.1117/12.863868

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