Speckle attenuation in optical coherence tomography by curvelet shrinkage

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Abstract

We describe an algorithm based on shrinkage in the curvelet domain to attenuate speckles in optical coherence tomography images. The algorithm exploits the curvelet transform's sparse representation of edge discontinuities that are common in OCT images and its ability to map signals and noise into different areas in the curvelet domain. The speckle attenuation is controlled by a single parameter that determines the threshold in the curvelet domain. Applying the algorithm to OCT images shows significant improvement of image quality. © 2009 Optical Society of America.

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Author Profiles

Zedong Chen
Renmin University of China
Lian Yu
Renmin University of China
Ziyu Yu

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