Speckle suppression via sparse representation for wide-field imaging through turbid media

Hwanchol Jang, Changhyeong Yoon, Euiheon Chung, Wonshik Choi, Heung No Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Speckle suppression is one of the most important tasks in the image transmission through turbid media. Insufficient speckle suppression requires an additional procedure such as temporal ensemble averaging over multiple exposures. In this paper, we consider the image recovery process based on the so-called transmission matrix (TM) of turbid media for the image transmission through the media. We show that the speckle left unremoved in the TM-based image recovery can be suppressed effectively via sparse representation (SR). SR is a relatively new signal reconstruction framework which works well even for ill-conditioned problems. This is the first study to show the benefit of using the SR as compared to the phase conjugation (PC) a de facto standard method to date for TM-based imaging through turbid media including a live cell through tissue slice.

Original languageEnglish
Pages (from-to)16619-16628
Number of pages10
JournalOptics Express
Volume22
Issue number13
DOIs
Publication statusPublished - 2014 Jun 30

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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