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Proceedings Paper

Comparison of the effect of lossy compressions with the modulation transfer function
Author(s): Yongguo Zhao; Ahmed Outif; Ian Stewart
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Paper Abstract

The purpose of this study was to examine the effects of lossy image compression on the quality of digital radiographic images and to compare the resolution properties of the three image compression algorithms (JPEG) on digital radiographic images using the Modulation Transfer Function (MTF). A single point source of Tc99m was scanned by a Gamma camera and its image was compressed by JPEG, wavelet and fractal algorithms at various compression levels. The PSFs for the original and compressed images were generated in Matlab 5.0. This was done by analyzing the pixel values along a direction through the center of the point source on each image. The MTF for each image was then calculated by Fourier transform of its PSF. The resolution properties of each compression techniques were presented. It has been found that the resolution properties of the compressed levels and algorithms are not straightforward.

Paper Details

Date Published: 18 July 1999
PDF: 11 pages
Proc. SPIE 3662, Medical Imaging 1999: PACS Design and Evaluation: Engineering and Clinical Issues, (18 July 1999); doi: 10.1117/12.352762
Show Author Affiliations
Yongguo Zhao, Bristol Royal Infirmary (United Kingdom)
Ahmed Outif, Bristol Royal Infirmary (United Kingdom)
Ian Stewart, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 3662:
Medical Imaging 1999: PACS Design and Evaluation: Engineering and Clinical Issues
G. James Blaine; Steven C. Horii M.D., Editor(s)

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