Abstract
We analyze the imaging of gray-scale objects through highly scattering layers. The theoretical investigation with numerical simulations shows that the contrast of the speckle autocorrelations varies regularly with the change of the gray scale of the object. Therefore, gray information is well contained in the autocorrelations of the speckle patterns, and gray-scale objects are able to be exacted from these autocorrelations via speckle correlation technology. Combined with phase retrieval via the generalized approximate message passing algorithm, recovery of the objects is realized and accurate gray-scale reconstruction is demonstrated via numerical simulations. Experiment results further demonstrate the good performance of the scheme in the imaging of gray-scale objects through scattering layers. Particularly, this work will be beneficial for applications of imaging through turbid media in biomedical and biophotonics imaging.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Chengfei Guo, Jietao Liu, Tengfei Wu, Lei Zhu, and Xiaopeng Shao
Appl. Opt. 57(4) 905-913 (2018)
Atul S. Somkuwar, Bhargab Das, R. V. Vinu, YongKeun Park, and Rakesh Kumar Singh
J. Opt. Soc. Am. A 34(8) 1392-1399 (2017)
Lei Zhu, JieTao Liu, Lei Feng, ChengFei Guo, TengFei Wu, and XiaoPeng Shao
OSA Continuum 1(2) 553-563 (2018)