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Title:
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Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography |
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Author:
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Dorney, Timothy D.; Bhashyam, Srikrishna; Doran, Andrew; Choi, Hyeokho; Flandrin, Patrick; Baraniuk, Richard G.
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Type:
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Conference Paper |
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Keywords:
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Image enhancement; edge sharpening; computed tomography; wavelets; reassignment |
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Citation:
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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, |
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Abstract:
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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. |
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Date Published:
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2000-07-01 |
