Near-lossless compression of computed tomography images using predictive coding with distortion optimization
Weinlich A, Amon P, Hutter A, Kaup A (2013)
Publication Language: English
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2013
Publisher: SPIE
Book Volume: 8669
Article Number: 86691G
Event location: Lake Buena Vista, Florida
ISBN: 9780819494436
DOI: 10.1117/12.2006931
Abstract
This paper presents a method for iterative minimization of combined residual and prediction error for near-lossless compression of medical computed tomography acquisitions using pixel-wise least-squares prediction. While most other lossy state-of-the-art image compression systems like JPEG 2000 make use of transform-based coding, in lossless coding higher compression ratios can be achieved with plain predictive algorithms like JPEG-LS because of their non-linear data adaptive energy reduction. Yet, applying these algorithms in lossy coding, simple quantization usually leads to error propagation and therefore serious quality loss or rate increase, as prediction accuracy of a pixel value and thus data rate depends on the previously reconstructed image region. The proposed minimization approach modifies the original image to be coded in a way such that the edge-directed prediction method from literature may achieve better predictions while introducing only a minimum amount of distortion. Compared to transform-based coding methods, the distortion introduced by the proposed scheme mostly consists in noise reduction instead of blurring or the introduction of artificial structures. The method also prevents error propagation due to the consideration of all pixel dependencies of the prediction. It is shown that, combined with a context-adaptive arithmetic coder, in high-fidelity coding (i. e., PSNR higher than 55 dB) the proposed method can achieve higher compression ratios than the transform-based approaches JPEG 2000, H.264/AVC, and HEVC intra coding. © 2013 SPIE.
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How to cite
APA:
Weinlich, A., Amon, P., Hutter, A., & Kaup, A. (2013). Near-lossless compression of computed tomography images using predictive coding with distortion optimization. In Proceedings of the SPIE Medical Imaging 2013: Image Processing. Lake Buena Vista, Florida, US: SPIE.
MLA:
Weinlich, Andreas, et al. "Near-lossless compression of computed tomography images using predictive coding with distortion optimization." Proceedings of the SPIE Medical Imaging 2013: Image Processing, Lake Buena Vista, Florida SPIE, 2013.
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