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Depixelation of coherent fiber bundle endoscopy based on learning patterns of image prior

Authors
Han, Jae-HoYoon, Sang Min
Issue Date
15-8월-2011
Publisher
OPTICAL SOC AMER
Citation
OPTICS LETTERS, v.36, no.16, pp.3212 - 3214
Indexed
SCIE
SCOPUS
Journal Title
OPTICS LETTERS
Volume
36
Number
16
Start Page
3212
End Page
3214
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/111789
DOI
10.1364/OL.36.003212
ISSN
0146-9592
Abstract
We present an iterative method of eliminating pixelation artifacts from an endoscopic image acquired from a coherent fiber bundle imager. Our proposed approach for decoupling the honeycomb effect from the obtained sample image was formulated by using the prior probability for an approximate Bayesian framework in which the ideal complete image can be estimated by maximizing the posterior probability from the observed image. The maximization of the posterior probability from the original mask image (the mirrored fiber bundle imager structure) and the observed image (the sample image of the United States Air Force chart) has been performed by learning the image priors in the space of Markov random fields. By iteratively estimating the probability distribution, we reduced the noise effects from the mask image and recovered the ideal shape of the image. This method was efficient for automatically learning the sliding patch from the combination of projected kernels. The mask and observed images were obtained from en face images of the Fourier domain optical coherence tomography based on a common path interferometry scheme. (C) 2011 Optical Society of America
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