Guo Lab @ Purdue ECE - Publication

Manuscripts

D-Flat: A Differentiable Flat-Optics Framework for End-to-End Metasurface Visual Sensor Design. [PDF] [Code/project page]Preprinted on arxiv, 2022.Dean Hazineh, Soon-Wei Daniel Lim, Zhujun Shi, Federico Capasso, Todd Zickler, and Qi Guo

2026

MetaSpectra+: A Compact Broadband Metasurface Camera for Snapshot Hyperspectral+ Imaging[PDF] [Project page]To appear in Computer Vision and Pattern Recognition (CVPR), 2026. Oral (0.88% acceptance rate). Award candidate paper (74 out of 16,092 submissions).Yuxuan Liu*, Wei Xu*, and Qi Guo*Equal Contribution

Spectrum from Defocus: Fast Spectral Imaging with Chromatic Focal Stack[PDF] [Project page]To appear in Computer Vision and Pattern Recognition (CVPR), 2026. Oral (0.88% acceptance rate).M. Kerem Aydin*, Yi-Chun Hung*, Jaclyn Pytlarz, Qi Guo, and Emma Alexander

SpiderCam: Low-Power Snapshot Depth from Differential Defocus

[PDF] [Project page]To appear in Computer Vision and Pattern Recognition (CVPR), 2026. Highlight (3.6% acceptance rate).Marcos A. Ferreira*, Tianao Li*, John Mamish*, Josiah Hester, Yaman Sangar, Qi Guo and Emma Alexander

Diffusion Algorithm for Metalens Optical Aberration Correction

[PDF] [Project page]2026 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)Harshana Weligampola, Yuanrui Chen, Abhiram Gnanasambandam, Weiheng Tang, Dilshan Godaliyadda, Hamid R. Sheikh, Qi Guo, and Stanley H. Chan

2025

Wavefront Estimation From a Single Measurement: Uniqueness and Algorithms[PDF] [Project page]To appear in IEEE Transactions on Computational Imaging (TCI)Nicholas Chimitt, Ali Almuallem, Qi Guo, and Stanley Chan

MetaH2: A Snapshot Metasurface HDR Hyperspectral Camera[PDF] [Code/project page]International Conference on Image Processing (ICIP), 2025Yuxuan Liu and Qi Guo

Depth from Coupled Optical Differentiation [PDF] [Code/project page]International Journal of Computer Vision (IJCV), 2025Junjie Luo, Yuxuan Liu, Emma Alexander, and Qi Guo

Bio-Inspired Computational Imaging: Components, Algorithms, and Systems[PDF]Annual Review of Vision Science, 2025Yi-Chun Hung, Qi Guo, and Emma Alexander

Focal Split: Untethered Snapshot Depth from Differential Defocus[PDF] [Project Page]Computer Vision and Pattern Recognition (CVPR), 2025Junjie Luo*, John Mamish*, Alan Fu*, Thomas Concannon, Josiah Hester, Emma Alexander, and Qi Guo*Equal Contribution

Blurry-Edges: Photon-Limited Depth Estimation from Defocused Boundaries[PDF] [Project Page]Computer Vision and Pattern Recognition (CVPR), 2025Wei Xu, Charles James Wagner, Junjie Luo, and Qi Guo

2024

CT-Bound: Robust Boundary Estimation From Noisy Images Via Hybrid Convolution and Transformer Neural Networks. [PDF] [Code]International Workshop on Multimedia Signal Processing (MMSP) 2024.Wei Xu, Junjie Luo, and Qi Guo

MetaHDR: Single-Shot High-Dynamic Range Imaging and Sensing using a Multifunctional Metasurface. (Spotlight on Optics!)[PDF] [Project Page/Code]Optics Express, 2024.Charles Brookshire*, Yuxuan Liu*, Yuanrui Chen, Wei-Ting Chen, and Qi Guo*Equal Contribution

Generative Quanta Color Imaging[PDF] [Project Page]Computer Vision and Pattern Recognition (CVPR), 2024Vishal Purohit, Junjie Luo, Yiheng Chi, Qi Guo, Stanley H. Chan, and Qiang Qiu

HyperColorization: propagating spatially sparse noisy spectral clues for reconstructing hyperspectral images[PDF] [Project Website] [Code]Optics Express, 2024M. Kerem Aydin, Qi Guo, and Emma Alexander

2023

Polarization Multi-Image Synthesis with Birefringent Metasurfaces[PDF] [Project Page] [Code] [D-Flat Code] [Slides]International Conference on Computational Photography (ICCP), 2023Dean Hazineh, Soon Wei Daniel Lim, Qi Guo, Federico Capasso, and Todd Zickler

Continuous 3D-LABEL Semi-Global Matching for Satellite Stereo[PDF]The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023.Sonali Patil and Qi Guo

Stellar: A Large Satellite Stereo Dataset for Digital Surface Model Generation[PDF] [Dataset]The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023.Sonali Patil and Qi Guo

2022 and Before

Raycast Calibration for Augmented Reality HMDs with Off-Axis Reflective Combiners. [PDF] [Video]International Conference on Computational Photography (ICCP), 2020.Qi Guo, Huixuan Tang, Aaron Schmitz, Wenqi Zhang, Yang Lou, Alexander Fix, Steven Lovegrove, and Hauke Strasdat

Compact single-shot metalens depth sensors inspired by eyes of jumping spiders. [DOI] [PDF] [Project page] [Video]Proceedings of the National Academy of Sciences (PNAS), 2019.Qi Guo, Zhujun Shi, Yao-Wei Huang, Emma Alexander, Cheng-Wei Qiu, Federico Capasso, and Todd Zickler.

Tackling 3D ToF Artifacts Through Learning and the FLAT Dataset. [PDF] [Project page] [Video]Proc. European Conference on Computer Vision (ECCV), 2018. Qi Guo, Iuri Frosio, Orazio Gallo, Todd Zickler and Jan Kautz.

Focal track: Depth and Accommodation with Oscillating Lens Deformation. Proc. International Conference on Computer Vision (ICCV), 2017. (Best Demo Award, ICCP 2018.) [PDF] [Project page]Qi Guo, Emma Alexander, and Todd Zickler

Focal Flow: Measuring Distance and Velocity with Defocus and Differential Motion. Proc. European Conference on Computer Vision (ECCV), 2016. (Best Student Paper Award.) [PDF] [Project page] [Video] International Journal of Computer Vision (IJCV), 2017. [PDF]Emma Alexander, Qi Guo, Sanjeev J. Koppal, Steven J. Gortler, and Todd Zickler

Conference Abstracts & Presentations

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