Block-based conditional entropy coding for medical image compression

Sriperumbudur Vangeepuram Bharath Kumar; Nithin Nagaraj; Sudipta Mukhopadhyay; Xiaofeng Xu

doi:10.1117/12.480466

19 May 2003 Block-based conditional entropy coding for medical image compression

Sriperumbudur Vangeepuram Bharath Kumar, Nithin Nagaraj, Sudipta Mukhopadhyay, Xiaofeng Xu

Proceedings Volume 5033, Medical Imaging 2003: PACS and Integrated Medical Information Systems: Design and Evaluation; (2003) https://doi.org/10.1117/12.480466
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

In this paper, we propose a block-based conditional entropy coding scheme for medical image compression using the 2-D integer Haar wavelet transform. The main motivation to pursue conditional entropy coding is that the first-order conditional entropy is always theoretically lesser than the first and second-order entropies. We propose a sub-optimal scan order and an optimum block size to perform conditional entropy coding for various modalities. We also propose that a similar scheme can be used to obtain a sub-optimal scan order and an optimum block size for other wavelets. The proposed approach is motivated by a desire to perform better than JPEG2000 in terms of compression ratio. We hint towards developing a block-based conditional entropy coder, which has the potential to perform better than JPEG2000. Though we don't indicate a method to achieve the first-order conditional entropy coder, the use of conditional adaptive arithmetic coder would achieve arbitrarily close to the theoretical conditional entropy. All the results in this paper are based on the medical image data set of various bit-depths and various modalities.

Citation Download Citation

Sriperumbudur Vangeepuram Bharath Kumar, Nithin Nagaraj, Sudipta Mukhopadhyay, and Xiaofeng Xu "Block-based conditional entropy coding for medical image compression", Proc. SPIE 5033, Medical Imaging 2003: PACS and Integrated Medical Information Systems: Design and Evaluation, (19 May 2003); https://doi.org/10.1117/12.480466

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