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3月19日学术报告

来源： 发布时间：2014-03-18【字体：大 中 小】

　　外宾报告： 

　　报告题目：Compressive phase retrieval 

　　报告人：Prof. George Barbastathis (MIT) 

　　  

　　本所报告： 

　　报告题目：coherent diffraction imaging and its potential applications in the field of high power laser 

　　报告人：刘诚研究员 

　　报告题目：Compressive reconstruction in ghost imaging 

　　报告人：李恩荣副研究员 

　　报告题目：3D scanning Imaging 

　　报告人：Shengbin Wei 

　　报告题目：Study on aberration measurement of lithographic projection lenses based on aerial images 

　　报告人：Guanyong Yan 

　　  

　　时间：2014年3月19日（周三）下午1:30 

　　地点：1号楼多功能厅 

　　  

　　外宾报告摘要 

　　Compressive   sensing    is a  class of image  recovery  techniques utilizing sparsity priors to recover       undersampled  signals with high fidelity.  In this talk,  I will describe several examples of       application of  compressive sensing to phase retrieval, both interferometric     and non-interferometric. For interferometric techniques, also   known as “digital holography,” I will describe how to localize sparse objects, such as vibrating whiskers  and  particles in multi-phase flows, with sub-pixel accuracy. For non-interferometric techniques, I will discuss in particular the  use   of intensity priors in the “transport of intensity equation” method, where the phase is obtained   by analogy to  a lateral pressure potential in a compressible       flow. Transport of intensity is especially  interesting in the x-ray regime, where standard interferometry is       difficult   because common    sources are spatially partially  coherent  and  beam splitters-combiners are  not available; as     a concluding   example, I will show how the     sparsity prior of quasi-constant object density allows successful x-ray       phase recovery despite the low coherence.     

　　  

　　外宾简历 

George Barbastathis received the Diploma in       Electrical and Computer Engineering in 1993 from the National      Technical       University of  Athens (Πολυτεχνείο) and the MSc and       PhD degrees    in Electrical Engineering       in 1994 and 1997, respectively, from the California Institute of Technology    (Caltech.)       After post-doctoral work at the University of Illinois at Urbana-Champaign,       he joined the faculty at MIT in 1999, where he is now Professor of Mechanical Engineering and holds the Singapore Research Professorship in Optics. During    the academic year 2013-14 he is on sabbatical     leave at the University of Michigan – Shanghai Jiao

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