Ioannis Gkioulekas

Research

I work broadly in computer vision and computer graphics, but I focus on computational imaging: this is the joint design of optics, electronics, and computation to create imaging systems with unprecedented capabilities. Some examples include: imaging systems that can see around corners or through skin; passive 3D sensing systems with extreme resolution; ultrafast programmable lenses; imaging systems that adapt to their environments. Technical keywords that often show up in my research include: non-line-of-sight imaging, single-photon imaging, LiDAR, SONAR, interferometry, speckle, acousto-optics, physics-based rendering, differentiable rendering, Monte Carlo simulation, probabilistic modeling.

Publications

Visit my group website for a complete publication list.

Publications before CMU

inverse_transient — **An Evaluation of Computational Imaging Techniques for Heterogeneous Inverse Scattering**
**Ioannis Gkioulekas**, Anat Levin, Todd Zickler
European Conference on Computer Vision (ECCV), 2016
paper | project page

transient — **Micron-scale Light Transport Decomposition Using Interferometry**
**Ioannis Gkioulekas**, Anat Levin, Frédo Durand, Todd Zickler
ACM Transactions on Graphics (SIGGRAPH), 2015
paper | project page

translucentedges — **On the Appearance of Translucent Edges**
**Ioannis Gkioulekas**, Bruce Walter, Edward H. Adelson, Kavita Bala, Todd Zickler
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2015
paper | project page

perception — **Looking Against the Light: How Perception of Translucency Depends on Lighting Direction**
Bei Xiao, Bruce Walter, **Ioannis Gkioulekas**, Todd Zickler, Edward H. Adelson, Kavita Bala
Journal of Vision (JOV), 2014
paper | project page

acquisition — **Inverse Volume Rendering with Material Dictionaries**
**Ioannis Gkioulekas**, Shuang Zhao, Kavita Bala, Todd Zickler, Anat Levin
ACM Transactions on Graphics (SIGGRAPH Asia), 2013
paper | project page

translucency — **Understanding the Role of Phase Function in Translucent Appearance**
**Ioannis Gkioulekas**, Bei Xiao, Shuang Zhao, Edward H. Adelson, Todd Zickler, Kavita Bala
ACM Transactions on Graphics 2013 (Presented at SIGGRAPH 2013)
paper | project page

vss — **Effects of Shape and Color on the Perception of Translucency**
Bei Xiao, **Ioannis Gkioulekas**, Asher Dunn, Shuang Zhao, Todd Zickler, Edward H. Adelson, Kavita Bala
Vision Science Society Annual Meeting (VSS), 2012
abstract | slides | data

microvision — **Toward Wide-Angle Microvision Sensors**
Sanjeev J. Koppal, **Ioannis Gkioulekas**, Travis Young, Hyunsung Park, Kenneth B. Crozier, Geoffrey L. Barrows, Todd Zickler
IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), 2013
paper | project page

sparseldr — **Dimensionality Reduction Using the Sparse Linear Model**
**Ioannis Gkioulekas**, Todd Zickler
Advances in Neural Information Processing Systems (NIPS), 2011
paper | project page

microsensor — **Wide-angle Micro Sensors for Vision on a Tight Budget**
Sanjeev J. Koppal, **Ioannis Gkioulekas**, Todd Zickler, Geoffrey L. Barrows
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2011
paper | project page

surprise — **Spatial Bayesian Surprise for Image Saliency and Quality Assessment**
**Ioannis Gkioulekas**, Giorgos Evangelopoulos, Petros Maragos
IEEE International Conference on Image Processing (ICIP), 2010
project page

Teaching

15463 — **15-463/663/862 Computational photography**
**Instructor**, CMU, 2017 - present

15468 — **15-468/668/868 Physics-based rendering**
**Instructor**, CMU, 2021 - present

Interferometry SIGGRAPH 2023 — **Course on computational interferometric imaging**
**Organizer**, SIGGRAPH, 2023

PBR CVPR 2023 — **Tutorial on physics-based rendering and its applications in computational photography and imaging**
**Organizer**, CVPR, 2023

PBDR CVPR 2021 — **Tutorial on physics-based differentiable rendering**
**Organizer**, CVPR, 2021

16385 — **16-385 Computer Vision**
**Instructor**, CMU, 2018 - 2020

Code

Code for projects at CMU is available at the CMU Computational Imaging GitHub account. Code for some older projects is available at my personal GitHub account. I use the coding and style conventions described here in all of my projects.