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Proceedings Paper

Use of Fourier domain subsampling for real-time wavelet compression of ultrasound video
Author(s): Keith C. Stegbauer; Rex K. Andrew; Steven G. Langer; Brent K. Stewart
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Paper Abstract

Wavelet compression has been shown to give exceptional subjective image quality with high compression ratios for medical imaging. In an effort to effect real-time wavelet compression of digitized ultrasound video for low bandwidth networks, Fourier domain subsampling may demonstrate reduced computational overhead compared to convolution methods. The anticipated benefit is dependent on: the size of the mother wavelet used, data dimensions along each axis, and available Fourier processing power. The process of wavelet compression is comptutationally expensive, requiring multiple convolutions with similar mother wavelets at different resolutions. In contrast, Fourier domain subsampling states that if an image is downsampled by a factor of two,the spatial frequencies of the image all increase by a factor of two. This allows the use of only one forward FFT on the data at run time, and only one inverse FFT at the time of each filter application, significantly reducing the computational load. A wavelet transform in the third dimensions takes advantage of the high correlation between adjacent frames in ultrasound video. Our presentation will demonstrate a comparison of benchmarks for both wavelet transform methods and analyze the advantage with respect to mother wavelet size.

Paper Details

Date Published: 26 May 1999
PDF: 9 pages
Proc. SPIE 3658, Medical Imaging 1999: Image Display, (26 May 1999); doi: 10.1117/12.349461
Show Author Affiliations
Keith C. Stegbauer, Univ. of Washington (United States)
Rex K. Andrew, Univ. of Washington (United States)
Steven G. Langer, Univ. of Washington (United States)
Brent K. Stewart, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 3658:
Medical Imaging 1999: Image Display
Seong Ki Mun; Yongmin Kim, Editor(s)

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