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Proceedings Paper

Hierarchical Image Decomposition And Filtering Using The S-Transform
Author(s): Surendra Ranganath; Hartwig Blume
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Paper Abstract

Image Transforms, such as the S-Transform, provide a hierarchical representation of the image which is attractive as part of a data compression technique in a PACS environment. In this paper, the S-Transform is shown to be a special case of subband coding, thus characterizing the spectral behavior of the transform. The S-Transform decomposes the frequency plane into roughly octave spaced regions. The corresponding "octave" images in the spatial domain can be linearly combined with different weights in order to synthesize an enhanced image. This is a computationally efficient process which provides a great deal of flexibility in the specification of the enhancement MTF characteristic. Examples are shown of enhanced computed radiographs, comparing the results of our technique and unsharp masking.

Paper Details

Date Published: 27 June 1988
PDF: 16 pages
Proc. SPIE 0914, Medical Imaging II, (27 June 1988); doi: 10.1117/12.968716
Show Author Affiliations
Surendra Ranganath, Philips Laboratories (United States)
Hartwig Blume, Philips Medical Systems Inc. (United States)

Published in SPIE Proceedings Vol. 0914:
Medical Imaging II
Samuel J. Dwyer; Roger H. Schneider; Samuel J. Dwyer; Roger H. Schneider; Roger H. Schneider; Samuel J. Dwyer, Editor(s)

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