Near-lossless image compression: a key to high-quality data distribution

Bruno Aiazzi; Luciano Alparone; Stefano Baronti

doi:10.1117/12.409256

17 November 2000 Near-lossless image compression: a key to high-quality data distribution

Bruno Aiazzi, Luciano Alparone, Stefano Baronti

Proceedings Volume 4122, Mathematics and Applications of Data/Image Coding, Compression, and Encryption III; (2000) https://doi.org/10.1117/12.409256
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

This paper promotes the use of near-lossless image compression and describes two DPCM schemes suitable for this purpose. The former is causal and is based on a classified linear-regression prediction followed by context-based arithmetic coding of the outcome residuals. It provides impressive performances, both with and without loss, especially on medical images. Coding time are affordable thanks to fast convergence of training. Decoding is always performed in real time. The latter is a noncausal DPCM and relies on a modified Laplacian pyramid in which feedback of quantization errors is introduced in order to upper bound reconstruction errors. Although the predictive method is superior for medium and high rates, the pyramid encoder winds for low rates and allows to encode and decode both in real time. Comparisons with block-DCT JPEG show that the proposed schemes are more than competitive also in terms of rate distortion.

Citation Download Citation

Bruno Aiazzi, Luciano Alparone, and Stefano Baronti "Near-lossless image compression: a key to high-quality data distribution", Proc. SPIE 4122, Mathematics and Applications of Data/Image Coding, Compression, and Encryption III, (17 November 2000); https://doi.org/10.1117/12.409256

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KEYWORDS

Image compression

Computer programming

Quantization

Error analysis

Distortion

Image enhancement

Medical imaging

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