Despeckling vs averaging of retinal UHROCT tomograms: advantages and limitations

Justin A. Eichel; Donghyun D. Lee; Alexander Wong; Paul W. Fieguth; David A. Clausi; Kostadinka K. Bizheva

doi:10.1117/12.875867

11 February 2011 Despeckling vs averaging of retinal UHROCT tomograms: advantages and limitations

Justin A. Eichel, Donghyun D. Lee, Alexander Wong, Paul W. Fieguth, David A. Clausi, Kostadinka K. Bizheva

Proceedings Volume 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV; 78893C (2011) https://doi.org/10.1117/12.875867
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Imaging time can be reduced using despeckled tomograms, which have similar image metrics to those obtained by averaging several low speed tomograms or many high speed tomograms. Quantitative analysis was used to compare the performance of two speckle denoising approaches, algorithmic despeckling and frame averaging, as applied to retinal OCT images. Human retinal tomograms were acquired from healthy subjects with a research grade 1060nm spectral domain UHROCT system with 5μm axial resolution in the retina. Single cross-sectional retinal tomograms were processed with a novel speckle denoising algorithm and compared with frame averaged retinal images acquired at the same location. Image quality metrics such as the image SNR and contrast-to-noise ratio (CNR) were evaluated for both cases.

Citation Download Citation

Justin A. Eichel, Donghyun D. Lee, Alexander Wong, Paul W. Fieguth, David A. Clausi, and Kostadinka K. Bizheva "Despeckling vs averaging of retinal UHROCT tomograms: advantages and limitations", Proc. SPIE 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 78893C (11 February 2011); https://doi.org/10.1117/12.875867

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KEYWORDS

Composites

Signal to noise ratio

Image quality

Optical coherence tomography

Speckle

Image processing

Image registration

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