Collaborations

Past and Present

Teaching

I’m currently teaching the following courses in Fall, Winter, and Summer:

Fall Quarter

COMP_SCI 331: Introduction to Computational Photography
(co-taught with Prof. Oliver Cossairt)
See course website for more information

Winter Quarter

ELEC_ENG 420: Digital Image Processing
(co-taught with Prof. Oliver Cossairt)
See course website for more information

Summer Quarter

ELEC_ENG 395, 495: Computational Photography Seminar

Research

A selection of my past and present research projects. Please request my CV for a full list. More projects will be added soon.

3D videos of fast scenes with high data quality

Imaging through scattering media or around corners at high resolution

A handheld motion robust 3D scanner

3D imaging methods accessible to a broad audience

A novel approach to Time-of-Flight imaging based on Multi-Wavelength Interferometry

Depth sensing using thermal light sources

Invited Talks

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] [2] , [Slides on Request]

Fast, Precise, Ubiquitous: Novel Sensor Concepts for 3D Imaging and Imaging through Scattering Media
Information Photonics 2020 (IP’20), Taipei, Taiwan, 2020
[Abstract] , [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]

Publications and Patents

Please check my Google Scholar profile for the latest updates.

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)
[Video (YouTube)]

Intensity Interferometry-based 3D Imaging
F. Wagner, F. Schiffers, F. Willomitzer, O. Cossairt, A.Velten.
Optics Express 29(4), 4733-4745

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
arXiv Preprint

Method and system for three-dimensional surface measurement with a mobile device
F. Willomitzer, O. Cossairt, M. Walton, C.-K. Yeh, V. Gupta, W. Spies, F. Schiffers
US Patent App. 16 / 937,045

2020

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.
Research Square Preprint

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

Low-budget 3D scanning and material estimation using PyTorch3D
O. Cossairt, F. Willomitzer, C.-K. Yeh, M. Walton.
54th IEEE Asilomar Conference on Signals, Systems and Computers

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

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)
[Video (YouTube)]

Main module, system and method for self-examination of a user’s eye
A. Maier, G. Häusler, A. Milczarek, T. Geimer, M. Schreiter, T. Kaestner, F. Willomitzer
US Patent 10,709,328

Intensity interferometry-based depth ranging
F. Wagner, F. Schiffers, F. Willomitzer, O. Cossairt, A. Velten.
OSA Computational Optical Sensing and Imaging

Wavefront sensing based depth sensor for macroscopic objects
Y. Wu*, F. Li*, F. Willomitzer, A. Veeraraghavan, O. Cossairt (* joint first authors).
OSA Computational Optical Sensing and Imaging

2019

Synthetic Wavelength Holography: An Extension of Gabor’s Holographic Principle to Imaging with Scattered Wavefronts
F. Willomitzer, P. Rangarajan, F. Li, M. Balaji, M. Christensen, O. Cossairt.
arXiv Preprint

Optical 3-D sensor for fast and dense shape capture
F. Willomitzer
US Patent 10,404,967

Spatially resolved Indirect Imaging of objects beyond the line of sight
P. Rangarajan, F. Willomitzer, O. Cossairt, MP. Christensen
Proc. SPIE 11135, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2019

Micro resolution imaging range sensor system
O. Cossairt, F. Li , F. Willomitzer, P. Rangarajan
US Patent App. 16 / 367,532

Non-Line-of-Sight Imaging with Superheterodyne Remote Digital Holography
F. Willomitzer, F. Li, M.M. Balaji, P. Rangarajan, O. Cossairt
OSA Computational Optical Sensing and Imaging, CM2A. 2

3D Surface Measurement and Analysis of Works of Art
B. Xu, F. Willomitzer, C.-K. Yeh, F. Li, V. Gupta, J.E. Tumblin, M. Walton, O. Cossairt 53rd IEEE Asilomar Conference on Signals, Systems, and Computers

Speckle based Extended Depth-of-Field for Macroscopic Imaging: First results
F. Schiffers, F. Willomitzer, P. Ruiz, A.K. Katsaggelos, O. Cossairt
OSA Computational Optical Sensing and Imaging, CTh4A. 6

Mega-pixel time-of-flight imager with GHz modulation frequencies
F. Li, F. Willomitzer, P. Rangarajan, O. Cossairt.
OSA Computational Optical Sensing and Imaging, CTh2A. 2

Time-domain optical coherence tomography can measure artworks with high penetration and high resolution
B. Xu, K. He, P. Hao, J. Gao, F. Willomitzer, A.K. Katsaggelos, J.E. Tumblin, O. Cossairt, M. Walton.
SPIE Optics for Arts, Architecture, and Archaeology VII 11058, 110580M

2018

High Resolution Single-Shot 3D Imaging with the “3D movie camera”
F. Willomitzer, G. Häusler.
OSA 3D Image Acquisition and Display: Technology, Perception and Applications, 3M3G. 2

Micro Resolution Time-of-Flight Imaging
F. Li, F. Willomitzer, P. Rangarajan, A. Velten, M. Gupta, O. Cossairt.
OSA Computational Optical Sensing and Imaging, CM2E. 4

Non-Line-of-Sight Imaging using Superheterodyne Interferometry
F. Willomitzer, F. Li, M.M. Balaji, P. Rangarajan, O. Cossairt.
OSA Computational Optical Sensing and Imaging, CM2E. 1

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)

2017

Single-Shot 3D Sensing Close to Physical Limits and Information Limits
F. Willomitzer.
Dissertation, University Erlangen-Nuremberg, Published as book in the series “Springer Theses” in 2019

Single-shot 3D motion picture camera with a dense point cloud
F. Willomitzer, G. Häusler.
Optics Express 25(19), 23451-23464

2016

The 3D Motion Picture Camera - About Single-Shot, High Resolution 3D-Imaging
F. Willomitzer, G. Häusler.
Proceedings of the 117th DGaO Conference, Hannover, B4

2015

A stroll through 3D imaging and measurement
G. Häusler, F. Willomitzer
ICO Newsletter, No. 104

Towards the single-shot 3D movie camera
F. Willomitzer, F. Schiffers, M. Kuch, G. Häusler
Proceedings of the 116th DGaO Conference, Brno, A13.

Space-Bandwidth-Speed: the real challenge for optical 3D-sensors
G. Häusler, Z. Yang, F. Willomitzer
Proceedings of the 116th DGaO Conference, Brno, A7.

Single-shot 3D sensing with improved data density
F. Willomitzer, S. Ettl, C. Faber, G. Häusler.
Applied Optics, 54(3), 408-417

2014

Hand – guided 3D surface acquisition by combining simple light sectioning with real-time algorithms
O. Arold, S. Ettl, F. Willomitzer, G. Häusler
arXiv:1401.1946.

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.

Light-sectioning with many lines - how to settle the information deficit
F. Willomitzer, S. Ettl, G. Häusler.
Proceedings of the 115th DGaO Conference, Karlsruhe, A21.

Plausibility-based approach to eliminate line pattern indexing ambiguities
S. Ettl, F. Willomitzer, G. Häusler.
Proceedings of the 115th DGaO Conference, Karlsruhe, A22.

Calibration of multi-line-light-sectioning
F. Schiffers, F. Willomitzer, S. Ettl, Z. Yang, G. Häusler.
Proceedings of the 115th DGaO Conference, Karlsruhe, P12.

Automated evaluation tools in medicine enabled by a motion-robust optical 3D sensor
S. Ettl, F. Schiffers, F. Willomitzer, S. Rampp, C. Strauss, G. Häusler.
Proceedings of the 115th DGaO Conference, Karlsruhe, P10.

Multi-line triangulation with many lines
M. Kuch, F. Willomitzer, F. Schiffers, Z. Yang, S. Ettl, G. Häusler.
Proceedings of the 115th DGaO Conference, Karlsruhe, P11 (poster award).

2013

Flying Triangulation – Towards the 3D Movie Camera
F. Willomitzer, S. Ettl, O. Arold, G. Häusler.
Fringe 2013, The 7th International Workshop on Advanced Optical Imaging & Metrology, W. Osten, Springer, Berlin, 895 898.

Detection and correction of line indexing ambiguities in Flying Triangulation
F. Willomitzer, S. Ettl, O. Arold, G. Häusler.
Proceedings of the 114th DGaO Conference, Braunschweig, A12.

Tomographic Triangulation
G. Häusler, F. Willomitzer, P. Dienstbier, C. Faber.
Proceedings of the 114th DGaO Conference, Braunschweig, A16.

Management of head motion during MEG recordings with Flying Triangulation
S. Ettl, A. Sadeghzadeh, F. Willomitzer, O. Arold, S. Rampp, H. Stefan, G. Häusler.
Proceedings of the 114th DGaO Conference, Braunschweig, A13.

Improved EEG source localization employing 3D sensing by “Flying Triangulation
S. Ettl, S. Rampp, S. Fouladi, S. S. Dalal, F. Willomitzer, O. Arold, H. Stefan, G. Häusler.
Proceedings SPIE 8791A, Videometrics, Range Imaging, and Applications XII, 8791-32.

Improved EEG source localization using a novel 3D sensor
S. Rampp, S. S. Dalal, F. Willomitzer, O. Arold, S. Fouladi-Movahed, G. Häusler, H. Stefan, S.Ettl.
Epilepsia 54, 264-265

2012

Flying Triangulation – a motion-robust optical 3D sensor for the real-time shape acquisition of complex objects.
F. Willomitzer, S. Ettl, O. Arold, G. Häusler.
Proceedings of the 3rd International Topical Meeting on Optical Sensing and Artificial Vision, Saint Petersburg, Russia, AIP Volume 1537,19-26.

Why can’t we purchase a perfect single shot 3D-sensor?
G. Häusler, C. Faber, F. Willomitzer, P. Dienstbier.
Proceedings of the 113th DGaO Conference, Eindhoven, A8.

Calibration of “Flying Triangulation”
M. Schröter, F. Willomitzer, O. Arold, S. Ettl, G. Häusler.
Proceedings of the 113th DGaO Conference, Eindhoven, P25.

Robust pattern indexing methods for “Flying Triangulation”
S. Ettl, F. Willomitzer, O. Arold, G. Häusler.
Proceedings of the 113th DGaO Conference, Eindhoven, P24.

Sparse active triangulation grids for respiratory motion management
S. Bauer, S. Ettl, J. Wasza, F. Willomitzer, F. Huber, J. Hornegger, G. Häusler.
Proceedings of the 112th DGaO Conference, Ilmenau, P23.

Koregistrierung von Elektroenzephalographie und Kernspintomographie mittels des optischen Sensorprinzips “Flying Triangulation” (German only)
S. Rampp, S. Ettl, S. Fouladi-Movahed, F. Willomitzer, O. Arold, H. Stefan, G. Häusler.
RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren (184).

Medical applications enabled by a motion-robust optical 3D sensor
S. Ettl, S. Fouladi-Mavahed, S. Bauer, O. Arold, F. Willomitzer, F. Huber, S. Rampp, H. Stefan, J. Hornegger, G. Häusler.
Proceedings of the 113th DGaO Conference, Eindhoven, P22.

2011

Options and limitations of “Flying Triangulation”
F. Willomitzer, O. Arold, F. Huber, S. Ettl, G. Häusler.
Proceedings of the 112th DGaO Conference, Ilmenau, P29.

3D body scanning with “Flying Triangulation”
F. Huber, O. Arold, F. Willomitzer, S. Ettl, G. Häusler.
Proceedings of the 112th DGaO Conference, Ilmenau, P30 (poster award).

2010

FlyFace – 3D face measurement with Flying Triangulation
F. Willomitzer
Diploma Thesis, University Erlangen-Nuremberg

„Flying Triangulation“ – Acquiring 360° Topography of the Human Body on the Fly
S. Ettl, O. Arold, F. Willomitzer, Z. Yang, G. Häusler.
Proceedings of the International Conference on 3D Body Scanning Technologies, Lugano, Switzerland, 279-284.

3D face scanning with “Flying Triangulation”
F. Willomitzer, Z. Yang, O. Arold, S. Ettl, G. Häusler.
Proceedings of the 111th DGaO Conference, Wetzlar, P18 (poster award).

Contact

Florian Willomitzer

florian [dot] willomitzer [at] northwestern [dot] edu

Northwestern University
Department of Electrical Engineering and Computer Science
Seeley Mudd Building, Rm 3515
2233 Tech Drive, Evanston, IL 60208