Efficient lossless coding model for medical images by applying integer-to-integer wavelet transform to segmented images

6 June 2000 Efficient lossless coding model for medical images by applying integer-to-integer wavelet transform to segmented images

Shuyu Yang, Gilberto Zamora, Mark Wilson, Sunanda Mitra

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Proceedings Volume 3979, Medical Imaging 2000: Image Processing; (2000) https://doi.org/10.1117/12.387670
Event: Medical Imaging 2000, 2000, San Diego, CA, United States

Abstract

Existing lossless coding models yield only up to 3:1 compression. However, a much higher lossless compression can be achieved for certain medical images when the images are segmented prior to applying integer to integer wavelet transform and lossless coding. The methodology used in this research work is to apply a contour detection scheme to segment the image first. The segmented image is then wavelet transformed with integer to integer mapping to obtain a lower weighted entropy than the original. An adaptive arithmetic model is then applied to code the transformed image losslessly. For the male visible human color image set, the overall average lossless compression using the above scheme is around 10:1 whereas the compression ratio of an individual slice can be as high as 16:1. The achievable compression ratio depends on the actual bit rate of the segmented images attained by lossless coding as well as the compression obtainable from segmentation alone. The computational time required by the entire process is fast enough for application on large medical images.

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Shuyu Yang, Gilberto Zamora, Mark Wilson, and Sunanda Mitra "Efficient lossless coding model for medical images by applying integer-to-integer wavelet transform to segmented images", Proc. SPIE 3979, Medical Imaging 2000: Image Processing, (6 June 2000); https://doi.org/10.1117/12.387670

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KEYWORDS

Image segmentation

Image compression

Wavelet transforms

Image processing

Medical imaging

Wavelets

Chromium

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