Sotiris Nousias
Welcome to my website! I am Sotiris, Postdoctoral Fellow at University of Toronto working with Prof. Kyros Kutulakos . My current research focuses on imaging and 3D reconstruction under low light conditions.
Prior to UofT, I obtained my PhD from UCL under the supervision of Prof. Christos Bergeles . During my PhD, I conducted research on structure from motion with light fields. Centuries ago, I worked on state estimation for legged robots under the supervision of Prof. Evangelos Papadopoulos.
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Research
I'm interested in computer vision, computational photography and neural fields. My current research revolves around photon cameras, a cutting-edge technology capable of detecting the tiniest unit of light - the photon. I'm excited about coming up with new ways to process signals from photon cameras, so we can see the world in never-before-seen ways.
I will join Purdue University in the
CS department as an assistant professor in Fall 2025!
Prospective students:
I am actively looking for motivated and talented students! If you are interested in joining my group, please read
this .
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Opportunistic Single‑Photon Time of Flight
Sotiris Nousias* ,
Mian Wei * ,
Howard Xiao ,
Maxx Wu ,
Shahmeer Athar ,
Kevin J. Wang ,
Anagh Malik ,
David A. Barmherzig ,
David B. Lindell ,
Kiriakos N. Kutulakos
* Joint first authors.
CVPR 2025, Oral
project page
We propose a passive single‑photon method that opportunistically recovers time‑of‑flight from ambient pulsed light sources.
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Passive Ultra-Wideband Single-Photon Imaging
Mian Wei* , Sotiris Nousias* , Rahul Gulve , David B. Lindell , Kiriakos N. Kutulakos
* Joint first authors.
ICCV 2023, Marr Prize (best paper award)
project page
We introduce a novel theory and method that passively captures a dynamic scene once and allows re-rendering of video across 9+ orders of magnitude in time.
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Transient Neural Radiance Fields for Lidar View Synthesis and 3D Reconstruction
Anagh Malik , Parsa Mirdehghan , Sotiris Nousias , Kiriakos N. Kutulakos , David B. Lindell
NeurIPS 2023, Spotlight
project page
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video
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arXiv
We introduce a method to do novel view lidar synthesis, allowing sparse view scene reconstruction.
Design and quasistatic modelling of hybrid continuum multi-arm robots
Zisos Mitros ,
S.M.Hadi Sadati ,
Sotiris Nousias ,
Lyndon Da Cruz ,
Christos Bergeles
ICRA 2022
Novel design and modelling of continuum robots for robotic surgery.
From Calibration to Large-Scale Structure from Motion with Light Fields
Sotirios D. Nousias
University College London , 2021
PhD Thesis
Examiners:
Prof. Andrew Davison ,
Dr Fransisco Vasconcelos
A linear approach to absolute pose estimation for light fields
Sotiris Nousias ,
Manolis Lourakis ,
Pearse Keane ,
Sebastien Ourselin ,
Christos Bergeles
3DV 2020
Absolute pose estimation for light fields using 4 correspondences.
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Large-scale, metric structure from motion for unordered light fields
Sotiris Nousias ,
Manolis Lourakis ,
Christos Bergeles
CVPR 2019
video
Large scale structure from motion framework for metric 3D reconstruction using light fields.
A Theory of Fermat Paths for Non-Line-of-Sight Shape Reconstruction
Shumian Xin ,
Sotiris Nousias ,
Kyriakos N. Kutulakos ,
Aswin C. Sankaranarayanan ,
Srinivasa G. Narasimhan ,
Ioannis Gkioulekas
CVPR 2019, Best Paper Award
project page
NLOS shape reconstruction.
Part-to-whole Registration of Histology and MRI using Shape Elements
Jonas Pichat, Juan Eugenio Iglesias, Sotiris Nousias , Tarek Yousry, Sebastien Ourselin, Marc Modat
ICCV Workshops 2017
Registration of different modalities in medical images using level-lines.
Corner-based Geometric Calibration of Multi-focus plenoptic cameras
Sotiris Nousias ,
Francois Chadebecq ,
Jonas Pichat ,
Pearse Keane ,
Sebastien Ourselin ,
Christos Bergeles
ICCV 2017
code
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supplementary
Calibration of plenoptic cameras using checkerboards.
Quadruped Robot Roll and Pitch Estimation using an Unscented Kalman Filter
Sotiris Nousias ,
Evangelos Papadopoulos
Med. Conf. on Control and Automation 2016
Estimation of a quadruped's roll and pitch using an IMU and leg kinematics.