Visually weighted assessment of image degradation resulting from image compression

Stefanie Lattner; Walter F. Good; Glenn S. Maitz

doi:10.1117/12.238481

15 April 1996 Visually weighted assessment of image degradation resulting from image compression

Stefanie Lattner, Walter F. Good, Glenn S. Maitz

Proceedings Volume 2707, Medical Imaging 1996: Image Display; (1996) https://doi.org/10.1117/12.238481
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

This investigation is a preliminary attempt to derive a figure-of-merit (FOM) characterizing the image degradation that can occur as a result of image compression. The usefulness of a visible difference predictor (VDP), which is based on previously published psychophysical models, is assessed. Specifically, this is a preliminary attempt to relate physical differences between an original image and a compressed version of the original to visible differences and then to calculate a FOM indicating the degree to which images have been degraded based on this visible difference. The FOM was applied to phantom images and to CT images that had been compressed at various ratios using either the JPEG algorithm or a wavelet compression algorithm. Comparisons between the VDP based measures and more traditional measures of image degradation suggest that, while this FOM may overcome some of the shortcomings of simpler measures such as root-mean-square (RMSE), the use of a VDP has limitations of its own.

Citation Download Citation

Stefanie Lattner, Walter F. Good, and Glenn S. Maitz "Visually weighted assessment of image degradation resulting from image compression", Proc. SPIE 2707, Medical Imaging 1996: Image Display, (15 April 1996); https://doi.org/10.1117/12.238481

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