Intelligent Imaging Lab

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Welcome

Welcome to Purdue Intelligent Imaging Lab (i2Lab). Follow us at

Mission

In i2lab, our mission is to build intelligent cameras by co-designing sensors and algorithms to enable seeing in all imaging conditions.

Research

• photon-limited imaging

• imaging through turbulence

• Astronomical imaging (coming soon)

• Cognitive sensing (coming soon)

Seminar / Tutorials

Research News

2023-07 New paper ‘‘Physics-Driven Turbulence Image Restoration with Stochastic Refinement’’, ICCV. 2023-03 New paper ‘‘HDR Imaging with Spatially Varying Signal-to-Noise Ratios’’, CVPR. 2023-03 New paper ‘‘Structured Kernel Estimation for Photon-Limited Deconvolution’’, CVPR. 2023-01 New paper ‘‘On the Insensitivity of Bit Density to Read Noise in One-bit Quanta Image Sensors’’, IEEE Sensors Journal.
2022-12 New paper ‘‘Real-Time Dense Field Phase-to-Space Simulation of Imaging through Atmospheric Turbulence’’, IEEE Trans. Comp. Imaging.
2022-11 New paper ‘‘Graph-Based Depth Denoising and Dequantization for Point Cloud Enhancement’’, IEEE Trans. Image Process.
2022-10 New paper ‘‘Photon-Limited Non-Blind Deblurring Using Algorithm Unrolling’’, IEEE Trans. Comp. Imaging.
2022-09 New paper ‘‘What Does a One-Bit Quanta Image Sensor Offer?’’ IEEE Trans. Comp. Imaging.
2022-08 New paper ‘‘Tilt-then-Blur or Blur-then-Tilt? Clarifying the Atmospheric Turbulence Model’’ IEEE Signal Processing Letters.
2022-07 New paper ‘‘Exposure-Referred Signal-to-Noise Ratio for Digital Image Sensors’’ IEEE Trans. Comp. Imaging.
2022-06 Prof Chan and Nick Chimitt gave tutorial at CVPR 2022 Imaging through Atmospheric Turbulence.
2022-05 New paper ‘‘Review of Quanta Image Sensors for Ultralow-Light Imaging’’ IEEE Journal Electron Devices
2022-01 New paper ‘‘Graph Signal Restoration Using Nested Deep Algorithm Unrolling’’ IEEE Trans. Signal Processing.
2021-11 New paper ‘‘Graph-Based Depth Denoising and Dequantization for Point Cloud Enhancement’’ arXiv.
2021-11 We are selected to participate in IARPA Biometric Recognition and Identification at Altitude and Range.
2021-10 New paper ‘‘Photon Limited Non-Blind Deblurring Using Algorithm Unrolling’’, arXiv.
2021-08 New paper ‘‘Photon-Limited Object Detection using Non-local Feature Matching and Knowledge Distillation’’, IEEE Intl. Conf. Computer Vision Workshop (ICCV-w), 2021.
2021-08 New paper ‘‘Detecting and Segmenting Adversarial Graphics Patterns from Images’’, IEEE Intl. Conf. Computer Vision Workshop (ICCV-w), 2021.
2021-08 New paper ‘‘Optical Adversarial Attack’’, IEEE Intl. Conf. on Computer Vision Workshop (ICCV-w), 2021.
2021-07 New paper ‘‘Accelerating Atmospheric Turbulence Simulation via Learned Phase-to-Space Transform’’, IEEE International Conference on Computer Vision (ICCV), 2021.
2021-06 Prof Chan gave an invited talk at CVPR 2021 on Imaging through Atmospheric Turbulence.
2021-03 New paper ‘‘Student-Teacher Learning from Clean Inputs to Noisy Inputs’’ IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2021.
2021-01 New paper ‘‘Low-light demosaicking and denoising for small pixels using learned frequency selection, IEEE Transactions on Computational Imginag.
2020-11 New paper ‘‘HDR Imaging with Quanta Image Sensors: Theoretical Limits and Optimal Reconstruction’’ IEEE Transactions on Computational Imaging, 2020.
2020-08 Our project on turbulence receives a regular grant from NSF ECCS core.
2020-07 New paper ‘‘Dynamic low-light imaging with Quanta Image Sensors’’ European Conference on Computer Vision (ECCV), 2020.
2020-07 New paper ‘‘Image classification in the dark using Quanta Image Sensors’’ European Conference on Computer Vision (ECCV), 2020.
2020-07 New paper ‘‘Simulating anisoplanatic turbulence by sampling inter-modal and spatially correlated Zernike coefficients’’ Optical Engineering, 2020.
2020-06 New paper ‘‘One size fits all: Can we train one denoiser for all noise levels?’’ International Conference on Machine Learning (ICML), 2020.
2020-05 New paper ‘‘Simulating anisoplanatic turbulence by sampling correlated Zernike coefficients IEEE Intl. Conf. Computational Photography (ICCP), 2020.
2020-04 New research grant from the Army Research Office for funding our project on adversarial robustness in real environment.

News of i2Lab Faculty

2022-12 Prof Chan won the IEEE Signal Processing Society Best Paper Award for Plug-and-Play ADMM published in IEEE Trans. Comp. Imaging in 2017.
2022-05 Prof Chan is recognized as an outstanding reviewer for CVPR 2022.
2021-08 Prof Chan is recognized by the IEEE Signal Processing Society as an Outstanding Associate Editor for the IEEE Transactions on Computational Imaging.
2021-08 Prof Chan is recognized as an Outstanding engineering teacher.
2021-05 Prof Chan is promoted to Elmore Associate Professor of Electrical and Computer Engineering.
2020-04 Prof Chan is promoted to Associate Professor with tenure.
2019-06 Prof Chan receives Ruth and Joel Spira Outstanding Teaching Award 2019.
2019-03 Prof Chan receives Purdue College of Engineering Early Career Teaching Award 2019.
2019-01 Prof Chan is appointed as Associate Editor for IEEE Transactions on Computational Imaging.
2018-04 Prof Chan is selected as a Purdue Teaching for Tomorrow Fellow 2018.
2018-04 Prof Chan receives HKN Outstanding Professor Award 2018.
2017-03 Prof Chan is elevated to IEEE senior member.
2016-11 Prof Chan receives Purdue College of Engineering Outstanding Graduate Mentor Award.
2016-09 Prof Chan and PhD student Omar Elgendy wins Best Paper Award in IEEE ICIP 2016.
2016-09 Prof Chan is appointed as an Associate Editor for Optics Express.
2016-09 Prof Chan and undergraduate students appear in IEEE Signal Processing Magazine for SP Cup 2016.
2016-05 Prof Chan co-organizes a special session on Integration of Imaging Systems and Computational Algorithms in ICIP 2016.
2016-03 Prof Chan and undergraduate students win IEEE Signal Processing Cup 2016 Second Prize.
2015-11 Prof Chan receives HKN Outstanding Teacher Award 2015.
2015-09 Prof Chan is elected to IEEE Signal Processing Society Special Interest Group on Computational Imaging.

News of i2Lab Members

2022-04 Abhiram Gnanasambandam pass his Ph.D. defense. Congratulations Dr. Abhiram!
2022-03 Abhiram Gnanasambandam received Outstanding Graduate Researcher Award 2022.
2021-10 Chengxi Li passed her Ph.D. defense. Congratulations Dr. Li!
2020-04 Guanzhe Hong received Magoon Excellence TA Award 2020.
2019-07 Xiran Wang passed his Ph.D. defense. Congratulations Dr. Wang!
2019-05 Omar Elgendy passed his Ph.D. defense. Congratulations Dr. Elgendy!
2018-05 Joon Hee Choi passed his Ph.D. defense. Congratulations Dr. Choi!
2018-01 Omar Elgendy received the Purdue Bilsland Dissertation Fellowship.

Education News

2022-04 Summer course on Machine Learning for Beginners. Registration open!
2022-01 New course ECE495 Cameras, Images, Inverse Problems
2021-06 Summer course on Machine Learning for Beginners.
2020-11 New book on Introduction to Probability for Data Science.
2020-08 ECE302 Undergraduate Probability Fall 2020. See course Lectures and Videos.
2021-01 ECE595 Machine Learning I Spring 2021. See course Lectures and Videos.

Media Coverage

2021-08 Optical adversarial attack can change the meaning of road signs (unite.ai).
2020-11 New HDR imaging capability using single-photon image sensors (Purdue ECE News).
2020-07 New breakthroughs in computer vision for imaging in the dark (Purdue ECE News).
2020-07 Resolving fast movement in low light (Image Sensor World Blog).
2020-06 Training one deep neural network for all noise levels (Purdue ECE News).
2020-05 ECE researcher to study adversarial attack in real environment (Purdue ECE News).

Sponsors

Research at i2Lab is sponsored by

• DARPA-SRC JUMP 2.0 (2023-2026) (co-PI)
  

• Samsung Global Research Outreach Award 2023 (PI)
  

• Samsung Research America (2022, 2023) (single PI)
  

• IARPA (2021-2024) (co-PI)
  

• NSF: RI: Small Learning to See Through Atmospheric Turbulence (2022-2024) (single PI)
  

• NSF: SCALE MoDL: Robust Deep Learning in Real Physical Space: Generalization, Scalability, and Credibility (2021-2024) (co-PI)

• NSF: CCSS: Small: Short-Exposure Imaging through Atmospheric Turbulence using Single Photon Image Sensors (2020-2023) (single PI)

• Army Research Office: Adversarial Robustness in Real Environment (2020-2021) (single PI)

• NSF: CIF: Medium: Multi-Agent Consensus Equilibrium: Modular Methods for Integrating Disparate Sources of Expertise (2018-2022) (co-PI)

• NSF: CIF: Small: Signal Processing for Quanta Image Sensors: Reconstruction, Sampling, and Applications (2017-2021) (single PI)

• Air Force Research Lab and Leidos: Mitigating Turbulence in Long Range Imagery using Consensus Equilibrium (2018 - 2019) (single PI)

• HypeVR: Image Processing for Virtual Reality Applications (2017-2018) (single PI)

• and other sponsors.