I am an Assistant Professor in the EECS Department at Northwestern University. My research interests lie at the intersection of optics, computer vision, and computer graphics. Before joining Northwestern, I spent one year (Oct. 2011 – Aug. 2012) as a Postdoctoral Researcher at Columbia University, under the supervision of Professor Prof. Shree Nayar. I earned my Ph.D. in Computer Science from Columbia University. In September 2011, I completed my dissertation on The Limits and Tradeoffs in Computational Imaging. From September 2006-2011, I was a doctoral candidate at Columbia University under the advisement Prof. Shree Nayar and Prof. Peter Belhumeur. I received an NSF Graduate Research Fellowship from 2008-2011. From 2003-2006, I worked as an Optical and Software Engineer, managing a NIST ATP research initiative to develop next generation 3D displays for a Actuality Systems. In 2003, I recieved an M.S. from the MIT Media Lab, where I worked with the Spatial Imaging Group and wrote my thesis on View-Sequential 3D Displays.
Personal Website: Visit Ollie’s Homepage
Yudong Yao is currently a Postdoctoral Researcher at the Department of Electrical Engineering and Computer Science, Northwestern University. She received the B.S. degree from Shandong University, Shandong, China, in 2012, and the Ph.D. degree in optical engineering from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, in 2017. Her current research interests include ptychography, coherent diffraction imaging method, X-ray imaging, and three-dimensional imaging.
Florian graduated from the University Erlangen-Nuremberg in Germany, where he received his Diploma and later his Dr. (graduation with “summa cum laude”). During his time in Erlangen, Florian worked in the group “Optical Sensing, Metrology and Inspection” (OSMIN), led by Prof. Gerd Häusler, and was a freelancer in the group’s spin-off company “3D-Shape GmbH”. Moreover, he worked as a part time teacher for physics in high school during the time of his doctoral studies.
In his Ph.D. thesis, Florian investigated the physical limits and information theoretical limits of optical 3D-sensing and implemented sensors that reach these limits. He developed a single-shot 3D movie camera that delivers 300,000 independent 3D points with high resolution from each 1 Mpix camera frame.
At Northwestern University, Florian works on emerging optical techniques to obtain non-line-of-sight information. Besides this, his research interest is still focused on 3D metrology, where he investigates novel techniques for 3D imaging under challenging conditions.
Nathan is a Ph.D. student in the EECS Department working in the Computational Photography Lab at Northwestern University. He completed his undergrad at Northwestern University, after which he worked for several years in the special-effects industry. Nathan studies novel methods for 3D imaging in challenging environments. His current research topics include high-speed laser scanning, snapshot 3D microscopy, and photometric stereo methods for cultural heritage applications. Nathan is also an Emmy-nominated visual effects artist with credits including ABC’s Once Upon a Time and Pixar’s W.A.L.L.-E.
Investigating an Ancient Mummy with Augmented Reality
Focal Surface Displays
Compressive Reconstruction For 3D Incoherent Holographic Microscopy
A Streamlined Photometric Stereo Framework for Cultural Heritage
Toward Long Distance, Sub-diffraction Imaging Using Coherent Camera Arrays
Projects: Investigating an Ancient Mummy with Augmented Reality ,  Focal Surface Displays ,  Compressive Reconstruction For 3D Incoherent Holographic Microscopy ,  A Streamlined Photometric Stereo Framework for Cultural Heritage ,  Toward Long Distance, Sub-diffraction Imaging Using Coherent Camera Arrays
Personal Website: Visit Nathan’s Homepage
Kuan He is a Ph.D. student in the EECS Department working in the Computational Photography Lab at Northwestern University. He is interested in applying sparse modeling and compressed sensing techniques to Fourier Transform Holography and Coherent Diffraction Imaging, with applications to X-Ray imaging.
Fengqiang Li is a Ph.D. student in the EECS Department working in the Computational Photography Lab at Northwestern University. He is interested in image processing and various optical imaging techniques. He is currently working on Time-of-Flight imaging systems. Fengqiang received his Master degree in Electrical and Computer Engineering from Lehigh University, where he worked on optical coherence microscopy. Before that, Fengqiang got his Bachelor degree in Optoelectronic Information Engineering from Huazhong University of Science and Technology.
Zihao Wang is a Ph.D student in the EECS Department at Northwestern University. He received his B.S. degree in Optics from Zhejiang University with Honors from Chu Ko-Chen Honors College in China. His current research interest include computational imaging/photography, computer vision and color science (appearance).
Personal Website: Visit Winston’s Homepage
Chia-Kai Yeh is a Ph.D student in the EECS Department working in the Computational Photography Lab at Northwestern University. He received his Bachelor’s degree in Electronics Engineering from Chang Gung University in Taiwan, after which he worked in the computational camera industry. His current research interest including Light Field and Reflectance Field acquisition, Appearance measurement and modeling.
Weixin Jiang is a first-year Ph.D. student in the EECS department working in the Computational Photography Lab at Northwestern University. He is interested in deep learning, image processing, various imaging techniques. He is currently working on Ptychography related projects. Before coming here, Weixin received his Master and Bachelor degree at Tsinghua University, China.
Sushobhan Ghosh is a Ph.D. student in the EECS Department working in the Computational Photography Lab at Northwestern University. He completed his undergrad at Indian Institute of Technology Delhi (IIT Delhi), India in 2016. Sushobhan is interested in machine learning applications in computational photography and computer vision problems. His current research topics include deep learning based image enhancement in challenging environment, ptychography using automatic differentiation, deep learning based fourier ptychography and time of flight imaging.
Florian graduated 2017 from FAU Erlangen in Germany where he received a M.Sc. in Physics and a M.Sc.Hons in Advanced Optical Technologies. He wrote his thesis on Computed Tomography in Talbot-Lau X-ray Phase-Contrast Imaging under the joint supervision of Prof. Gisela Anton, Dr-Ing Christian Riess and Prof. Andreas Maier.
Prior to this Florian was conducting research in the field of optical 3D sensing in the group of Prof. Gerd Häusler (2012-2015). Later, he worked at Siemens Healthineers on a pre-development project in robotics for image-guided surgery. After graduation he spent six months at the Peking University in China with the Department of Biomedical Engineering lead by Prof. Qiushi Ren working on machine learning applications in Ophthalmology.
At Northwestern Florian is working on algorithm development for inverse problems. He is especially interested on how to enhance conventional techniques, e.g. reconstruction based on physical models, by exploiting the power of data-driven machine learning. His current projects include imaging through scattering media, extended depth-of-field imaging, tomographic problems with different modalities as well as topographic imaging.
Sudarshan Nagesh is currently a Research Specialist at the Department of Electrical Engineering and Computer Science, Northwestern University. He received the B.Tech. degree from National Institute of Technology Karnataka (NITK), Surathkal, India, in 2012, and the M.Sc. (Engineering) degree in signal processing from Indian Institute of Science (IISc), Bangalore, India in 2015. He received the MS degree in computational imaging from the Rice University, Houston, USA in 2017. His research interests include computational imaging, ptychography, phase-retrieval, and finite-rate-of innovation signal sampling.
Previous Lab Members
Marina Alterman was a postdoctoral researcher in the Comp. Photo. Lab at Northwestern University. Marina earned her PhD in Electrical Engineering from the Technion-Israel Institute of Technology, advised by Prof. Yoav Schechner and Prof. Joseph Shamir. Her research dealt with vision through random refractive media, such as wavy water and turbulent air. She received her MSc degree in Electrical Engineering from the Technion, advised by Prof. Yoav Schechner on the subject of multiplexed fluorescence unmixing. Marina’s BSc degree is in Electrical and Bio-medical Engineering, also from the Technion.
Xiang Huang was a postdoctoral researcher in the Computational Photography Lab at Northwestern University from 2013 through 2016. Xiang Huang earned his PhD in Computer Science at Northwestern University, advised by Professor Jack Tumblin. He received his master’s degree in Electrical Engineeringunder Professor Xiaolin Wu at McMaster University, Canada, in 2006, and his bachelor’s degree in Electronics & Informationl Engineering from Huazhong University of Science and Technology (HUST), China, in 2003, respectively. Xiang Huang is interested in solving challenging problems in Computational Photography, Image Processing, Machine Learning, Computer Graphics and Computer Vision.
Projects: Compressive Reconstruction For 3D Incoherent Holographic Microscopy ,  A Streamlined Photometric Stereo Framework for Cultural Heritage ,  Near Light Correction for Image Relighting and 3D Shape Recovery ,  Gauguin: Surface Shape Studies of the Art of Paul Gauguin ,  Dictionary Learning Based Color Demosaicing of Plenoptic Cameras
Personal Website: Visit Xiang’s Homepage
Leonidas Spinoulas was born in Korinthos, Greece, in 1986. He received his B.Sc. degree in Electrical and Computer Engineering from the National Technical University of Athens, Greece in 2010. In September 2010 he joined Northwestern University under the supervision of Prof. Aggelos K. Katsaggelos and is currently co-advised by Prof. Cossairt. His primary research interests include Compressive Sensing, Sparse Representations, Signal and Image Restoration, Deblurring, Blind Deconvolution, Inverse Problems, Bayesian Methods and Computer Vision.
Projects: Compressive holographic video ,  Compressive Reconstruction For 3D Incoherent Holographic Microscopy ,  Ultra-Miniature Diffraction Gratings for Lensless Imaging ,  High-Speed Compressive Video
Ruibo Shang was an intern in the Computational Photography Lab at Northwestern University during the 2015-2016 academic year. His internship projects involve high dynamic range imaging with DMD system and 3D image refocusing & reconstruction.
Ming Zhao was a visiting scholar in the EECS of Northwestern University during 2017-2018. He is an associated professor in Dalian Maritime University of China. He received the B.S, M.S and Ph.D degree from Harbin Institute of Technology in 2005, 2007, and 2011, respectively. His current research interests include computational imaging/photography, super-resolution imaging, image processing and wavefront shaping, etc.
Jason Holloway is a Ph.D. candidate working under the guidance of Ashok Veeraraghavan in the Electrical and Computer Engineering Department of Rice University. His research interests are in computational imaging & photography and computer vision. He earned his B.S. degrees in Electrical and Computer Engineering and Physics from Clarkson University in 2010 and his M.S. in Electrical and Computer Engineering from Rice University in 2013. Jason is co-advised by Prof. Cossairt on his research on Macroscopic Fourier Ptychography.
Aggelos Katsaggelos is Professor and AT&T Chair in the EECS Department at Northwestern University. He also runs the Image and Video Processing Laboratory (IVPL), whose objective is to generate cutting-edge research results in the fields of multimedia signal processing, multimedia communications, and computer vision. IVPL works in a variety of problems (e.g., recovery, compression, segmentation, and speech and speaker recognition) and applications areas (e.g., medical, multi-spectral, and astronomical image processing). Dr. Katsaggelos is a Fellow of the IEEE (1998) and SPIE (2009), the co-inventor of seventeen international patents, the recipient of the IEEE Third Millennium Medal (2000), the IEEE Signal Processing Society Meritorious Service Award (2001), the IEEE Signal Processing Society Technical Achievement Award (2010), and co-author of several award-winning papers.
Personal Website: Visit IVPL Homepage
Jack Tumblin is Associate Professor in Electrical Engineering and Computer Science. He joined the Department of Computer Science at Northwestern University as an Assistant Professor in September 2001, after two years as a post-Doctoral Associate at the Program of Computer Graphics at Cornell University. He received his PhD in Computer Science in December, 1999 from the Georgia Institute of Technology in the College of Computing advised by Dr. Jessica Hodgins and Dr. Greg Turk at the Graphics, Visualization, and Usability Center. His Research interests include: Computational Photography & Illumination, Computer Vision and Interactive Computer Graphics, High Dynamic Range (HDR) Images and Image Processing, Digital Archives of Visual Appearance for Museum Collections, Human Visual Perception, Psychophysics, and Physiology.
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Marc Walton, D. Phil., Senior Scientist
Marc Walton currently holds the position of Research Associate Professor of Materials Science and Engineering in the McCormick School of Engineering and Applied Science at Northwestern University. He was trained in Chemistry and Art History at Clark University. He earned a D.Phil. from the University of Oxford in archaeological science following an MA in art history, as well as a diploma in the conservation of works of art, from the Institute of Fine Arts, New York University. After earning his Ph.D, Marc worked at the Los Angeles County Museum of Art for two years prior to joining the Getty Conservation Institute in 2005, where he was an associate scientist responsible for the scientific study of antiquities at the J. Paul Getty Museum. In addition, he established and ran the analytical laboratory at the Getty Villa site, and served as co-PI on a National Science Foundation Cultural Heritage Science grant on ancient Athenian pottery. His research has focused primarily on trade and manufacture of ancient objects.
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Hooman Mohseni is Professor in the EECS department at Northwestern University. He runs the The Bio-inspired Sensors and Optoelectronics Lab (BISOL). The lab has a general goal of producing novel photonics and optoelectronic devices inspired by nature. Current research is focused on infrared detectors and vision systems, nano-scale lasers, visible to terahertz plasmonics, and novel nano-processing. BISOL explores physics of nano-scale dimensions to realize novel devices that could revolutionize many medical, commercial, and security applications.
Personal Website: Visit Bisol Homepage