Unsharp masking and its inverse processing integrated in a compression/decompression scheme: application to cardiac angiograms

Patricia V. Beretta; Remy Prost

doi:10.1117/12.207618

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27 April 1995 Unsharp masking and its inverse processing integrated in a compression/decompression scheme: application to cardiac angiograms

Patricia V. Beretta, Remy Prost

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Proceedings Volume 2431, Medical Imaging 1995: Image Display; (1995) https://doi.org/10.1117/12.207618
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

Abstract

Image data compression can be useful for storage or transmission of cardiac angiograms. In clinical systems, images are recorded in a `raw' format, and are usually processed with an edge enhancement filter to improve the visibility of medical information. The raw images are needed for other processing including quantitative measurements, and their enhanced version is used for display. We report on a compression scheme based on full-frame DCT which allows the integration of enhancement in the codec. We investigated whether the raw or the enhanced image should be compressed. We studied an inverse filter and integrated it in the decompression process, so that a non-enhanced image can be derived after enhancement and compression. The de-enhancement filter acts as a low pass filter for the quantization noise. We proposed to improve the inverse filter using a regularized signal restoration technique.

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Patricia V. Beretta and Remy Prost "Unsharp masking and its inverse processing integrated in a compression/decompression scheme: application to cardiac angiograms", Proc. SPIE 2431, Medical Imaging 1995: Image Display, (27 April 1995); https://doi.org/10.1117/12.207618

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