Comparison of the effect of lossy compressions with the modulation transfer function

Yongguo Zhao; Ahmed Outif; Ian Stewart

doi:10.1117/12.352762

18 July 1999 Comparison of the effect of lossy compressions with the modulation transfer function

Yongguo Zhao, Ahmed Outif, Ian Stewart

Proceedings Volume 3662, Medical Imaging 1999: PACS Design and Evaluation: Engineering and Clinical Issues; (1999) https://doi.org/10.1117/12.352762
Event: Medical Imaging '99, 1999, San Diego, CA, United States

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 Tc^99m 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.

Citation Download Citation

Yongguo Zhao, Ahmed Outif, and Ian Stewart "Comparison of the effect of lossy compressions with the modulation transfer function", Proc. SPIE 3662, Medical Imaging 1999: PACS Design and Evaluation: Engineering and Clinical Issues, (18 July 1999); https://doi.org/10.1117/12.352762

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KEYWORDS

Image compression

Modulation transfer functions

Fractal analysis

Wavelets

Image quality

Point spread functions

Quantization

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