The Computational Optics Group University of Wisconsin - Madison


The Computational Optics Group develops computational imaging systems for applications in biomedical imaging and remote sensing.

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How to contact us

Email enquiries should be sent to the group PI, Andreas Velten, at velten [at] You can find his other contact information in the BMI and ECE faculty webpages, or his personal webpage.


Dec 20, 2021

Our paper on Real Time Non-Line-of-Sight video imaging was amoung the 2021 most memorable news items of the UW news! Have a look at the article here.

Nov 11, 2021

Real-time video of scenes hidden around corners is now possible. Click here for more information.

March. 31, 2020

Is Visualizing Light Waves Possible? Click here for more information.

Aug. 13, 2019

Mohit Gupta (CS) and Andreas Velten (BMI) finalists for 2019 AutoSens Award. Click here for more information.

Aug. 5, 2019

Nature paper is online! Click here for more information.

Jun. 25, 2018

Azer Reza gave a talk on "Imaging with Phasor Fields for Non-Line-of Sight Applications" at the 2018 OSA COSI (Orlando, FL).

Our news

New Publications


Felipe Gutierrez-Barragan, Atul Ingle, Trevor Seets, Mohit Gupta, Andreas Velten,"Compressive Single-Photon 3D Cameras", IEEE/CVF Computer Vision and Pattern Recognition Conference (CVPR), New Orleans, LA, June 2022

Yuhao Liu, Felipe Gutierrez-Barragan, Atul Ingle, Mohit Gupta, Andreas Velten,"Single-Photon Camera Guided Extreme Dynamic Range Imaging", IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2022, pp. 1575-1585


Felipe Gutierrez-Barragan, Huaijin Chen, Mohit Gupta, Andreas Velten, Jinwei Gu. "iToF2dToF: A Robust and Flexible Representation for Data-driven Time-of-Flight Imaging". IEEE Transactions on Computational Imaging, 2021

Ji Hyun Nam, Eric Brandt, Sebastian Bauer, Xiaochun Liu, Marco Renna, Alberto Tosi, Eftychios Sifakis & Andreas Velten, "Low-latency time-of-flight non-line-of-sight imaging at 5 frames per second", Nature Communications, 2021

Zhengpeng Liao, Deyang Jiang, Xiaochun Liu, Andreas Velten, Yajun Ha, Xin Lou, "FPGA Accelerator for Real-Time Non-Line-of-Sight Imaging", IEEE Transactions on Circuits and Systems I, 2021

Deyang Jiang, Xiaochun Liu, Jianwen Luo, Zhengpeng Liao, Andreas Velten, Xin Lou, "Ring and Radius Sampling Based Phasor Field Diffraction Algorithm for Non-Line-of-Sight Reconstruction", IEEE Transactions on Pattern Analysis and Machine Intelligence, 2021

Julio Marco, Adrian Jarabo, Ji Hyun Nam, Xiaochun Liu, Miguel Angel Cosculluela, Andreas Velten, Diego Gutierrez, "Virtual light transport matrices for non-line-of-sight imaging", in ICCV (Oral), 2021

Atul Ingle, Trevor Seets, Mauro Buttafava, Shantanu Gupta, Alberto Tosi, Mohit Gupta, Andreas Velten, "Passive Inter-Photon Imaging ", in CVPR , 2021

Trevor Seets, Atul Ingle, Martin Laurenzis, Andreas Velten, "Motion Adaptive Deblurring With Single-Photon Cameras ", in WACV , 2021

Fabian Wagner, Florian Schiffers, Florian Willomitzer, Oliver Cossairt, Andreas Velten, "Intensity interferometry-based 3D imaging", in Optics Express , vol. 29, Iss.5, March 1, 2021


Ji Hyun Nam , Andreas Velten, "Super-Resolution Remote Imaging Using Time Encoded Remote Apertures "", MPDI Applied Sciences 2020, 10, 10.

Marco Renna, Ji Hyun Nam , Mauro Buttafava, Federica Villa, Andreas Velten, Alberto Tosi, "Fast-Gated 16 × 1 SPAD Array for Non-Line-of-Sight Imaging Applications "", MPDI Instruments 2020, 4, 14.

Xiaochun Liu,Sebastian Bauer, Andreas Velten, "Phasor Field Diffraction Based Reconstruction for Fast Non-Line-of-Sight Imaging Systems "", Nature Communications, April 2020

Xiaochun Liu, Andreas Velten, "The role of Wigner Distribution Function in Non-Line-of-Sight Imaging"", in ICCP 2020

Marco La Manna, Ji Hyun Nam, Syed Azer Reza,Andreas Velten, "Non-line-of-sight imaging using dynamic relay surfaces", in Optics Express , vol. 28, pp. 5331-5339, 2020

Ibón Guillén, Xiaochun Liu, Andreas Velten, Diego Gutierrez, Adrian Jarabo, "On the Effect of Reflectance on Phasor Field Non-Line-of-Sight imaging", in ICASSP 2020 , May 2020

Our Publications