Justin Liang

Currently I am a Research Scientist at Waabi. Prior to that, I was a Research Scientist at Uber ATG Toronto. I completed my MSc in Computer Science (Machine Learning Group) at the University of Toronto (2016-2018) and was supervised by Raquel Urtasun. Prior to that I completed my BASc in Mechanical Engineering (Mechatronics Program) at the University of British Columbia (2011-2016). My research interests lie on the intersection of Computer Vision and Machine Learning. My CV is available here.

My e-mail is justin dot j dot w dot liang at gmail dot com.


Mending Neural Implicit Modeling for 3D Vehicle Reconstruction in the Wild

Shivam Duggal*, Zihao Wang*, Wei-Chiu Ma, Siva Manivasagam, Justin Liang, Shenlong Wang, Raquel Urtasun. (WACV 2022)
[Paper] [Video]

VideoClick: Video Object Segmentation with a Single Click

Namdar Homayounfar, Justin Liang, Wei-Chiu Ma, Raquel Urtasun. (Arxiv 2021)
[Paper] [Video]

LevelSet R-CNN: A Deep Variational Method for Instance Segmentation

Namdar Homayounfar*, Yuwen Xiong*, Justin Liang*, Wei-Chiu Ma, Raquel Urtasun. (ECCV 2020)

PolyTransform: Deep Polygon Transformer for Instance Segmentation

Justin Liang, Namdar Homayounfar, Wei-Chiu Ma, Yuwen Xiong, Rui Hu, Raquel Urtasun. (CVPR 2020, 1st place on Cityscapes instance segmentation leaderboard)

DAGMapper: Learning to Map By Discovering Lane Topology

Namdar Homayounfar, Wei-Chiu Ma, Justin Liang, Xinyu Wu, Jack Fan, Raquel Urtasun. (ICCV 2019)

Convolutional Recurrent Network for Road Boundary Extraction

Justin Liang*, Namdar Homayounfar*, Wei-Chiu Ma, Shenlong Wang, Raquel Urtasun. (CVPR 2019)

End-to-End Deep Structured Models for Drawing Crosswalks

Justin Liang, Raquel Urtasun. (ECCV 2018)

TorontoCity: Seeing the World with a Million Eyes

Shenlong Wang, Min Bai, Gellert Mattyus, Hang Chu, Wenjie Luo, Bin Yang, Justin Liang, Joel Cheverie, Sanja Fidler, Raquel Urtasun. (ICCV 2017, Spotlight)


Canny Edge Detector

Tutorial on Canny edge detection algorithm using MATLAB.
[Tutorial] [Code]

Color Extraction by HSV

Tutorial on how to extract specific colours using MATLAB by applying HSV masks.
[Tutorial] [Code]


Egg Yolk Consistency Measurement Device

Designed and developed a device that measures the yolk consistancy of an egg by oscillating it on a spring. Please refer to my partner in crime who has written a nice webpage about this here.



A few of my favourite books that I highly recommend can be found here!

Food Things

Sharing some of my family recipes here!