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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 24 — Dec. 15, 2004
  • pp: 2878–2880

Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter

Desmond C. Adler, Tony H. Ko, and James G. Fujimoto  »View Author Affiliations


Optics Letters, Vol. 29, Issue 24, pp. 2878-2880 (2004)
http://dx.doi.org/10.1364/OL.29.002878


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Abstract

A spatially adaptive two-dimensional wavelet filter is used to reduce speckle noise in time-domain and Fourier-domain optical coherence tomography (OCT) images. Edges can be separated from discontinuities that are due to noise, and noise power can be attenuated in the wavelet domain without significantly compromising image sharpness. A single parameter controls the degree of noise reduction. When this filter is applied to ophthalmic OCT images, signal-to-noise ratio improvements of >7 dB are attained, with a sharpness reduction of <3% .

© 2004 Optical Society of America

OCIS Codes
(100.2980) Image processing : Image enhancement
(100.7410) Image processing : Wavelets
(110.4500) Imaging systems : Optical coherence tomography

Citation
Desmond C. Adler, Tony H. Ko, and James G. Fujimoto, "Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter," Opt. Lett. 29, 2878-2880 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-24-2878


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