We are working on a broad variety of problems in quantitative vision and computational imaging. Our research combines teachings from physical optics, image and signal processing, computer vision, and information theory. Our goal is to invent, develop, and build the next generation of 2D/3D computational imaging and display devices that overcome traditional limitations (e.g., in resolution, dynamic range, speed) to “make the unseen visible”. These instruments and the underlying principles will represent key technologies to foster transformational technical changes in the next decades.
Current applications of our developed techniques and systems can be found in medicine, VR/AR/MR, robotics, industrial inspection, automotive sensing, metrology, forensics, or cultural heritage preservation. Our present research includes novel methods to image hidden objects through scattering media or around corners, high-resolution holographic displays, and the implementation of high-precision metrology methods in low-cost mobile handheld devices. Moreover, we develop novel time-of-flight and structured light imaging techniques working at depth resolutions in the 100μm-range.
At Northwestern University, our lab is closely collaborating with the Computational Photography Lab (Prof. Oliver Cossairt), the Image and Video Processing Lab (Prof. Aggelos Katsaggelos), the Center for Scientific Studies in the Arts (Prof. Marc Walton), and Prof. Jack Tumblin.
Florian Willomitzer is a Research Assistant Professor in the Department of Electrical and Computer Engineering (ECE) at Northwestern University, IL. He graduated from the University of Erlangen-Nuremberg, Germany, where he received his Ph.D. degree in Physics with honors (‘summa cum laude’) in 2017. During his doctoral studies (PhD advisor: Prof. Gerd Häusler) Florian investigated physical and information theoretical limits of optical 3D-sensing and implemented sensors that operate close to these limits. Concurrent with his Ph.D. activity, he was a freelancer in the research group’s spin-off company ‘3D Shape GmbH’ (now part of ISRA Vision) and he worked as a high school part time teacher for physics. Florian joined Northwestern University as Postdoc (Postdoc advisor: Prof. Oliver Cossairt) in Fall 2017, where he further shaped his current research profile.
Florian is Chair of the OSA COSI conference and served/serves as reviewer for IEEE, OSA, SPIE, CVPR, and the Nature Portfolio. His Ph.D. thesis was awarded with the Springer Theses Award for Outstanding Ph.D. Research.
He is currently teaching the courses ‘CS331: Introduction to Computational Photography’, ‘EE420: Digital Image Processing’, and ‘EE395/495: Computational Photography Seminar’.
Paper on Synthetic Wavelength Holography accepted in Nature Communications!
(09/2021) Merlin presents SkinScan paper at ICIP
(07/2021) Jiazhang, Tianfu, Manuel, and Yunhao present at COSI
(05/2021) Fengqiang and Florian present work on high-resolution ToF imaging at ICCP
(05/2021) Florian gives an invited talk about Synthetic Wavelength Holography at the Erlangen Physics Colloquium
(05/2021) SkinScan paper accepted at ICIP!
(04/2021) Paper on high-resolution ToF imaging accepted at ICCP and in TPAMI!
(03/2021) Invited talk about Fundamental Limits in Computational Imaging at the FAU Beyond the Patterns series
(01/2021) Paper on Intensity Interferometry-based 3D imaging accepted in Optics Expresss!
(09/2020) Florian gives an invited talk about Computational Imaging at the Information Photonics Conference
(06/2020) Fabian and Florian present Intensity Interferometry work and NLoS work at COSI
(05/2020) Paper on Compressive Ghost Imaging with Deep Learning accepted in Optics Expresss!
(04/2020) Yicheng and Fengqiang present WISHED project at ICCP
(04/2020) Florian gives an invited talk about Fundamental Limits in 3D Imaging Systems at the Stanford SCIEN Seminar
(02/2020) Paper on Hand-guided Mobile Deflectometry accepted in Optics Expresss!
(02/2020) Paper on Wavefront sensing-based ToF imaging accepted at ICCP!
(01/2020) Fabian and Florian present Intensity Interferometry work and NLoS work at Electronic Imaging
A selection of our past and present research projects. More projects will be added soon.
3D videos of fast scenes with high data quality (5 associated publications)
Imaging through scattering media or around corners at high resolution (5 associated publications)
3D imaging methods accessible to a broad audience (7 associated publications)
A novel approach to Time-of-Flight imaging based on Multi-Wavelength Interferometry (7 associated publications)
Synthetic Wavelength Holography: Snapshot Non-Line-of-Sight Imaging with High-Resolution and Wide Field of View
F. Willomitzer, P. Rangarajan, F. Li, M. Balaji, M. Christensen, O. Cossairt.
Accepted in Nature Communications (Preprint on Research Square), 2021
Exploiting Wavelength Diversity for High Resolution Time-of-Flight 3D Imaging
F. Li*, F. Willomitzer*, M. Balaji, P. Rangarajan, O. Cossairt (* joint first authors).
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), 2021
SkinScan: Low-Cost 3D-Scanning for Dermatologic Diagnosis and Documentation
M. A. Nau, F. Schiffers, Y. Li, B. Xu, A. Maier, J. Tumblin, M. Walton, A. K. Katsaggelos, F. Willomitzer, O. Cossairt
2021 IEEE International Conference on Image Processing (ICIP), 2021
Intensity Interferometry-based 3D Imaging
F. Wagner, F. Schiffers, F. Willomitzer, O. Cossairt, A.Velten.
Optics Express 29(4), 4733-4745, 2021
Hand-Guided Qualitative Deflectometry with a Mobile Device
F. Willomitzer, C-K. Yeh, V. Gupta, W. Spies, F. Schiffers, A. Katsaggelos, M. Walton, O. Cossairt.
Optics Express 28(7), 9027-9038, 2020
WISHED: Wavefront Imaging Sensor with High resolution and Depth ranging
Y. Wu*, F. Li*, F. Willomitzer, A. Veeraraghavan, O. Cossairt (* joint first authors).
IEEE International Conference on Computational Photography (ICCP), 2020
Compressive Ghost Imaging through Scattering Media with Deep Learning
F. Li*, M. Zhao*, Z. Tian, F. Willomitzer, O. Cossairt (* joint first authors).
Optics Express 28(12), 17395-17408
SH-ToF: Micro Resolution Time-of-Flight Imaging with Superheterodyne Interferometry
F. Li, F. Willomitzer, P. Rangarajan, A. Velten, M. Gupta, O. Cossairt.
IEEE International Conference on Computational Photography (ICCP), 2018
Single-shot 3D motion picture camera with a dense point cloud
F. Willomitzer, G. Häusler.
Optics Express 25(19), 23451-23464, 2017
Single-shot 3D sensing with improved data density
F. Willomitzer, S. Ettl, C. Faber, G. Häusler.
Applied Optics, 54(3), 408-417, 2015
Consequences of EEG electrode position error on ultimate beamformer source reconstruction performance
S. S. Dalal, S. Rampp, F. Willomitzer, S. Ettl.
Frontiers in Neuroscience, 8(42), 1-7, 2014
PhD Thesis: Single-Shot 3D Sensing Close to Physical Limits and Information Limits
Dissertation, University Erlangen-Nuremberg, Published as book in the series “Springer Theses” in 2019
Prof. Willomitzer is currently teaching the following courses:
COMP_SCI 331: Introduction to Computational Photography
See course website for more information
Next term taught: Winter 2022
ELEC_ENG 395, 495: Computational Photography Seminar
Last term taught: Summer 2021
Please see ‘Publications’- and ‘Research’-section for recordings of contributed conference talks.
Synthetic Wavelength Holography – Imaging around Corners and through Scattering Media at the Physical Space-Bandwidth Limit
Physics Colloquium Talk Series, University Erlangen-Nuremberg, Germany, 2021
[Video] , [Announcement and Abstract] , [Slides on Request]
Fundamental Limits in Computational 3D Imaging – From Novel 3D Cameras to Looking around Corners
Beyond the Patterns Talk Series, University Erlangen-Nuremberg, Germany, 2021
[Video (YouTube)] , [Announcement and Abstract] , [Slides on Request]
The Role of Fundamental Limits in 3D Imaging Systems: From Looking around Corners to Fast 3D Cameras
Stanford Center for Image System Engineering (SCIEN), Stanford University, US, 2020
[Announcement and Abstract 1]  , [Slides on Request]
Three-Dimensional Non-Line-of-Sight Imaging with High Resolution using Superheterodyne Remote Digital Holography
Joint conference of the European Optical Society (EOS) and the German Society for Applied Optics (DGaO), Darmstadt, Germany, 2019
[Abstract] , [Slides on Request]
Optical 3D Imaging for Art and Cultural Heritage
Adventures in Seeing Works of Art: A COSI Workshop in Deflectometry, University of Chicago, US, 2019
[Slides on Request]
Exploiting the Physical Limits and Information Limits of Single-Shot 3D Sensing
OSA Incubator: Small Eyes & Smart Minds, Optical Society of America (OSA), Washington D.C., US, 2017
[Incubator Info] , [Slides on Request]
The 3D Motion Picture Camera - About Single-Shot, High Resolution 3D Imaging
IEEE International Conference on Computational Photography (ICCP), Northwestern University, US, 2016
[Conf. Proceedings] , [Slides on Request]
3D-Messtechnik 4.0 – Innovatives Highspeed-Messprinzip für 3D-Objekte
Infoteam Forum für innovative Anwendungsszenarien, Dortmund, Germany, 2016
[Slides on Request]
We are always looking for motivated students interested in pursuing a research project or thesis in our lab. Prospective students should have a background in Optics, Computer Science, Image and Signal Processing, or similar disciplines.
Please contact Prof. Willomitzer if you are interested.
Past and Present
The work shown on this website has been generously funded by the following agencies and industry partners:
Past and Present
florian [dot] willomitzer [at] northwestern [dot] edu
Department of Electrical and Computer Engineering
Seeley Mudd Building, Rm 3511
2233 Tech Drive, Evanston, IL 60208