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Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography

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Title: Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography
Author: Dorney, Timothy D.; Bhashyam, Srikrishna; Doran, Andrew; Choi, Hyeokho; Flandrin, Patrick; Baraniuk, Richard G.
Type: Conference Paper
Keywords: Image enhancement; edge sharpening; computed tomography; wavelets; reassignment
Citation: T. D. Dorney, S. Bhashyam, A. Doran, H. Choi, P. Flandrin and R. G. Baraniuk,"Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography," in SPIE Technical Conference on Mathematical Modeling, Estimation, and Imaging,
Abstract: Traditional filtering methods operate on the entire signal or image. In some applications, however, errors are concentrated in specific regions or features. A prime example is images generated using computed tomography. Practical implementations limit the amount of high frequency content in the reconstructed image, and consequently, edges are blurred. We introduce a new post-reconstruction edge enhancement algorithm, based on the reassignment principle and wavelets, that localizes its sharpening exclusively to edge features. Our method enhances edges without disturbing the low frequency textural details.
Date Published: 2000-07-01

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  • ECE Publications [1047 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • DSP Publications [508 items]
    Publications by Rice Faculty and graduate students in digital signal processing.
  • CMC Publications [275 items]
    Publications by Rice Faculty and graduate students in multimedia communications