Angel Xuan Chang

I am an Assistant Professor at Simon Fraser University. Prior to this, I was a visiting research scientist at Facebook AI Research and a research scientist at Eloquent Labs working on dialogue. I received my Ph.D. in Computer Science from Stanford, where I was part of the Natural Language Processing Group and advised by Chris Manning. My research focuses on connecting language to 3D representations of shapes and scenes and grounding of language for embodied agents in indoor environments. I have worked on methods for synthesizing 3D scenes and shapes from natural language, and various datasets for 3D scene understanding. In general, I am interested in the semantics of shapes and scenes, the representation and acquisition of common sense knowledge, and reasoning using probabilistic models. Some of my other interests include drawing and dance.

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Angel Xuan Chang
angelx-{at}-sfu-[dot]-ca

Assistant Professor
School of Computing Science
Simon Fraser University
GrUVi Lab | SFU NatLang | SFU AI/ML
Canada CIFAR AI Chair (Amii)
TUM-IAS Hans Fischer Fellow
Google Scholar

Publications

2021

Plan2Scene: Converting Floorplans to 3D Scenes  

Plan2Scene: Converting Floorplans to 3D Scenes

Madhawa Vidanapathirana, Qirui Wu, Yasutaka Furukawa, Angel X. Chang, Manolis Savva
CVPR 2021
Mirror3D: Depth Refinement for Mirror Surfaces  

Mirror3D: Depth Refinement for Mirror Surfaces

Jiaqi Tan, Weijie (Lewis) Lin, Angel X. Chang, Manolis Savva
CVPR 2021

2020

Rearrangement: A Challenge for Embodied AI  

Rearrangement: A Challenge for Embodied AI

Dhruv Batra, Angel X. Chang, Sonia Chernova, Andrew J. Davison, Jia Deng, Vladlen Koltun, Sergey Levine, Jitendra Malik, Igor Mordatch, Roozbeh Mottaghi, Manolis Savva, Hao Su
arXiv preprint arXiv:2011.01975 [cs.AI], November 2020
pdf

2019

Mimic and Rephrase: Reflective Listening in Open-Ended Dialogue  

Mimic and Rephrase: Reflective Listening in Open-Ended Dialogue

Justin Dieter, Tian Wang, Gabor Angeli, Angel X. Chang, Arun Tejasvi Chaganty
CONLL 2019
pdf | code
PlanIT: Planning and Instantiating Indoor Scenes with Relation Graph and Spatial Prior Networks  

PlanIT: Planning and Instantiating Indoor Scenes with Relation Graph and Spatial Prior Networks

Kai Wang, Yu-An Lin, Ben Weissmann, Manolis Savva, Angel X. Chang, Daniel Ritchie
SIGGRAPH 2019
pdf | code
Hierarchy Denoising Recursive Autoencoders for 3D Scene Layout Prediction  

Hierarchy Denoising Recursive Autoencoders for 3D Scene Layout Prediction

Yifei Shi, Angel X. Chang, Zhelun Wu, Manolis Savva, Kai Xu
CVPR 2019, arXiv:1903.03757 [cs.CV]
pdf | code | webpage

2018

Deep Convolutional Priors for Indoor Scene Synthesis  

Deep Convolutional Priors for Indoor Scene Synthesis

Kai Wang, Manolis Savva, Angel X. Chang, Daniel Ritchie
SIGGRAPH 2018
pdf | code

On evaluation of embodied navigation agents

Peter Anderson, Angel X. Chang, Devendra Singh Chaplot, Alexey Dosovitskiy, Saurabh Gupta, Vladlen Koltun, Jana Kosecka, Jitendra Malik, Roozbeh Mottaghi, Manolis Savva, Amir R. Zamir
arXiv preprint arXiv:1807.06757 [cs.AI], July 2018
pdf
Linking WordNet to 3D Shapes  

Linking WordNet to 3D Shapes

Angel X. Chang, Rishi Mago, Pranav Krishna, Manolis Savva, Christiane Fellbaum
Proceedings of Global WordNet Conference 2018
pdf

2017

Cross-modal Attribute Transfer for Rescaling 3D Models  

Cross-modal Attribute Transfer for Rescaling 3D Models

Lin Shao, Angel X. Chang, Hao Su, Manolis Savva, Leonidas Guibas
Proceedings of 3DV 2017
pdf
Learning Where to Look: Data-Driven Viewpoint Set Selection for 3D Scenes  

Learning Where to Look: Data-Driven Viewpoint Set Selection for 3D Scenes

Kyle Genova, Manolis Savva, Angel X. Chang, Thomas Funkhouser
arXiv:1704.02393 [cs.CV]
pdf
Semantic Scene Completion from a Single Depth Image  

Semantic Scene Completion from a Single Depth Image

Shuran Song, Fisher Yu, Andy Zeng, Angel X. Chang, Manolis Savva, Thomas Funkhouser
Proceedings of CVPR 2017 (oral), arXiv:1611.08974 [cs.CV]
pdf | webpage
A Two-stage Sieve Approach to Quote Attribution  

A Two-stage Sieve Approach to Quote Attribution

Grace Muzny, Michael Fang, Angel X. Chang, Dan Jurafsky
Proceedings of EACL 2017
pdf | code | data
SceneSuggest: Context-driven 3D Scene Design  

SceneSuggest: Context-driven 3D Scene Design

Manolis Savva, Angel X. Chang, Maneesh Agrawala
arXiv:1703.00061 [cs.CG], March 2017
pdf | demo
SceneSeer: 3D Scene Design with Natural Language  

SceneSeer: 3D Scene Design with Natural Language

Angel X. Chang, Mihail Eric, Manolis Savva, Christopher D. Manning
arXiv:1703.00050 [cs.CG], March 2017
pdf | demo

2016

Evaluating the word-expert approach for Named-Entity Disambiguation

Angel X. Chang, Valentin I. Spitkovsky, Christopher D. Manning, Eneko Agirre
arXiv:1603.04767 [cs.CL], March 2016
pdf

2015

Text to 3D scene generation  

Text to 3D scene generation

Angel X. Chang
 Ph.D. dissertation, Department of Computer Science, Stanford University, 2015
pdf
Semantically-Enriched 3D Models for Common-sense Knowledge  

Semantically-Enriched 3D Models for Common-sense Knowledge

Manolis Savva, Angel X. Chang, Pat Hanrahan
CVPR 2015 Vision meets Cognition Workshop
pdf | bib | webpage

2014

On Being the Right Scale: Sizing Large Collections of 3D Models  

On Being the Right Scale: Sizing Large Collections of 3D Models

Manolis Savva, Angel X. Chang, Gilbert Bernstein, Christopher D. Manning, Pat Hanrahan
SIGGRAPH Asia 2014 Workshop on Indoor Scene Understanding: Where Graphics meets Vision
pdf | bib | webpage
Learning Spatial Knowledge for Text to 3D Scene Generation  

Learning Spatial Knowledge for Text to 3D Scene Generation

Angel X. Chang, Manolis Savva, Christopher D. Manning
Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing (EMNLP 2014)
pdf | bib | webpage
Learning Affordance Maps by Observing Interactions  

Learning Affordance Maps by Observing Interactions

Manolis Savva, Angel X. Chang, Matthew Fisher, Matthias Nießner, Pat Hanrahan
CVPR 2014 Workshop on Functionality, Physics, Intentionality and Causality
pdf | bib
Interactive Learning of Spatial Knowledge for Text to 3D Scene Generation  

Interactive Learning of Spatial Knowledge for Text to 3D Scene Generation

Angel X. Chang, Manolis Savva, Christopher D. Manning
Proceedings of the ACL 2014 Workshop on Interactive Language Learning, Visualization, and Interfaces
pdf | bib | webpage
Semantic Parsing for Text to 3D Scene Generation  

Semantic Parsing for Text to 3D Scene Generation

Angel X. Chang, Manolis Savva, Christopher D. Manning
Proceedings of the ACL 2014 Workshop on Semantic Parsing
pdf | bib | webpage

2013

Stanford's 2013 KBP System

Gabor Angeli, Arun Tejasvi Chaganty, Angel X. Chang, Kevin Reschke, Julie Tibshirani, Jean Y. Wu, Osbert Bastani, Keith Siilats, Christopher D. Manning
In Proceedings of the Sixth Text Analysis Conference (TAC 2014)
pdf

SUTime: Evaluation in TempEval-3

Angel X. Chang, Christopher D. Manning
In Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 2: Proceedings of the Seventh International Workshop on Semantic Evaluation (SemEval 2013)
pdf

2012

Joint Entity and Event Coreference Resolution across Documents

Heeyoung Lee, Marta Recasens, Angel X. Chang, Mihai Surdeanu, Dan Jurafsky
Proceedings of the Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning (EMNLP-CoNLL 2012)
pdf | bib
SUTime: A Library for Recognizing and Normalizing Time Expressions.  

SUTime: A Library for Recognizing and Normalizing Time Expressions.

Angel X. Chang, Christopher D. Manning
In Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC 2012)
pdf | bib | poster | demo | webpage

A Cross-Lingual Dictionary for English Wikipedia Concepts

Valentin I. Spitkovsky, Angel X. Chang
 In Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC 2012)
pdf | bib | data | slides | post

2011

Stanford's Distantly-Supervised Slot-Filling System

Mihai Surdeanu, Sonal Gupta, John Bauer, David McClosky, Angel X. Chang, Valentin I. Spitkovsky, Christopher D. Manning
In Proceedings of the Fourth Text Analysis Conference (TAC 2011)
pdf | bib | data

Strong Baselines for Cross-Lingual Entity Linking

Valentin I. Spitkovsky, Angel X. Chang
 In Proceedings of the Fourth Text Analysis Conference (TAC 2011)
pdf | bib

Stanford-UBC Entity Linking at TAC-KBP, Again

Angel X. Chang, Valentin I. Spitkovsky, Eneko Agirre, Christopher D. Manning
In Proceedings of the Fourth Text Analysis Conference (TAC 2011)
pdf | bib

Unsupervised Dependency Parsing without Gold Part-of-Speech Tags

Valentin I. Spitkovsky, Hiyan Alshawi, Angel X. Chang, Dan Jurafsky
In Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing (EMNLP 2011)
pdf | bib | data | poster

2010

A Simple Distant Supervision Approach for the TAC-KBP Slot Filling Task

Mihai Surdeanu, David McClosky, Julie Tibshirani, John Bauer, Angel X. Chang, Valentin I. Spitkovsky, Christopher D. Manning
In Proceedings of the Third Text Analysis Conference (TAC 2010)
pdf | bib | slides

Stanford-UBC Entity Linking at TAC-KBP

Angel X. Chang, Valentin I. Spitkovsky, Eric Yeh, Eneko Agirre, Christopher D. Manning
In Proceedings of the Third Text Analysis Conference (TAC 2010)
pdf | bib | poster

2009

Stanford-UBC at TAC-KBP

Eneko Agirre, Angel X. Chang, Dan Jurafsky, Christopher D. Manning, Valentin I. Spitkovsky, Eric Yeh
In Proceedings of the Second Text Analysis Conference (TAC 2009)
pdf | bib | slides

2000

The Fractal Geometry of the Boundary of Dragon Curves  

The Fractal Geometry of the Boundary of Dragon Curves

Angel X. Chang, Tianrong Zhang
In Journal of Recreational Mathematics 30 (1), 9-22
pdf | bib