期刊论文

Li, Youfu

英文

Optics Express

1094-4087

2018

26

18

22837-22856

10.1364/OE.26.022837

Research Grants Council of Hong KongHong Kong Research Grants Council [CityU 11205015, CityU 11255716]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [61505064, 61673329]; Hong Kong Scholars Programs [XJ2016063]; National Natural Science Foundation of Hubei Province [2016CFB497]; National key Research and Development Program [2017YFB1401301, 2017YFB1401303, 2017YFB1401305]; Specific Funding for Education Science Research by Self-determined Research Funds of CCNU [CCNU18ZDPY10, CCNU16JYKX031]; Cultivating Excellent Doctoral Dissertations Program of CCNU [2017YBZZ009]

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FTIR spectrometer often suffers from common problems of band overlap and Poisson noises. In this paper, we show that the issue of infrared (IR) spectrum degradation can be considered as a maximum a posterior (MAP) problem and solved by minimized a cost function that includes a likelihood term and two prior terms. In the MAP framework, the likelihood probability density function (PDF) is constructed based on the observed Poisson noise model. A fitted distribution of curvelet transform coefficient is used as spectral prior PDF, and the instrument response function (IRF) prior is described based ...