Speckle reduction in optical coherence tomography images based on wave atoms

Yongzhao Du, Gangjun Liu, Guoying Feng, Zhongping Chen

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Optical coherence tomography (OCT) is an emerging noninvasive imaging technique, which is based on low-coherence interferometry. OCT images suffer from speckle noise, which reduces image contrast. A shrinkage filter based on wave atoms transform is proposed for speckle reduction in OCT images. Wave atoms transform is a new multiscale geometric analysis tool that offers sparser expansion and better representation for images containing oscillatory patterns and textures than other traditional transforms, such as wavelet and curvelet transforms. Cycle spinning-based technology is introduced to avoid visual artifacts, such as Gibbslike phenomenon, and to develop a translation invariant wave atoms denoising scheme. The speckle suppression degree in the denoised images is controlled by an adjustable parameter that determines the threshold in the wave atoms domain. The experimental results show that the proposed method can effectively remove the speckle noise and improve the OCT image quality. The signal-to-noise ratio, contrast-to-noise ratio, average equivalent number of looks, and cross-correlation (XCOR) values are obtained, and the results are also compared with the wavelet and curvelet thresholding techniques.

Original languageEnglish (US)
Article number056009
JournalJournal of Biomedical Optics
Volume19
Issue number5
DOIs
StatePublished - 2014
Externally publishedYes

Fingerprint

Optical tomography
Speckle
tomography
Atoms
atoms
Interferometry
Image quality
image contrast
Signal to noise ratio
shrinkage
Textures
imaging techniques
wavelet analysis
cross correlation
metal spinning
artifacts
emerging
interferometry
Imaging techniques
signal to noise ratios

Keywords

  • image enhancement
  • image processing
  • medical optics and biotechnology
  • optical coherence tomography
  • tomographic image processing

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Speckle reduction in optical coherence tomography images based on wave atoms. / Du, Yongzhao; Liu, Gangjun; Feng, Guoying; Chen, Zhongping.

In: Journal of Biomedical Optics, Vol. 19, No. 5, 056009, 2014.

Research output: Contribution to journalArticle

Du, Yongzhao ; Liu, Gangjun ; Feng, Guoying ; Chen, Zhongping. / Speckle reduction in optical coherence tomography images based on wave atoms. In: Journal of Biomedical Optics. 2014 ; Vol. 19, No. 5.
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