Low bit-rate image coding via interpolation oriented adaptive down-sampling

Yongbing Zhang; Jian Zhang; Ruiqin Xiong; Debin Zhao; Siwei Ma

doi:10.1117/12.863460

4 August 2010 Low bit-rate image coding via interpolation oriented adaptive down-sampling

Yongbing Zhang, Jian Zhang, Ruiqin Xiong, Debin Zhao, Siwei Ma

Proceedings Volume 7744, Visual Communications and Image Processing 2010; 77441C (2010) https://doi.org/10.1117/12.863460
Event: Visual Communications and Image Processing 2010, 2010, Huangshan, China

Abstract

An interpolation oriented adaptive down-sampling algorithm is proposed for low bit-rate image coding in this paper. Given an image, the proposed algorithm is able to obtain a low resolution image, from which a high quality image with the same resolution as the input image can be interpolated. Different from the traditional down-sampling algorithms, which are independent from the interpolation process, the proposed down-sampling algorithm hinges the down-sampling to the interpolation process. Consequently, the proposed down-sampling algorithm is able to maintain the original information of the input image to the largest extent. The down-sampled image is then fed into JPEG. A total variation (TV) based post processing is then applied to the decompressed low resolution image. Ultimately, the processed image is interpolated to maintain the original resolution of the input image. Experimental results verify that utilizing the downsampled image by the proposed algorithm, an interpolated image with much higher quality can be achieved. Besides, the proposed algorithm is able to achieve superior performance than JPEG for low bit rate image coding.

Citation Download Citation

Yongbing Zhang, Jian Zhang, Ruiqin Xiong, Debin Zhao, and Siwei Ma "Low bit-rate image coding via interpolation oriented adaptive down-sampling", Proc. SPIE 7744, Visual Communications and Image Processing 2010, 77441C (4 August 2010); https://doi.org/10.1117/12.863460

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