Angel Xuan Chang

I am a research scientist at Eloquent Labs working on dialogue. I will be starting at Simon Fraser University in Fall 2019 as Assistant Professor. Prior to this, I was a postdoctoral researcher working with Tom Funkhouser at Princeton. 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. I worked on text to 3D scene generation, and the ShapeNet project. 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.

News

Sept 9, 2018 - Visual Learning and Embodied Agents in Simulation Environments at ECCV 2018.
Sept, 2018 - Visiting Matthias Niessner at TUM.
July 11, 2018 - ShapeNet received the Symposium on Geometry Processing (SGP) dataset award.
June 29, 2018 - Invited talk at RSS 2018 workshop on New Benchmarks, Metrics, and Competitions for Robotic Learning.
June 11, 2018 - ScanNet v2 release and ScanNet Benchmark challenge announced.
June 3, 2018 - I joined Eloquent Labs.
May 2018 - Co-organizing ECCV 2018 workshop on Visual Learning and Embodied Agents in Simulation Environments.
March 2018 - I was awarded the TUM-IAS Hans Fischer Fellowship.

      angelx-{at}-cs-[dot]-stanford-"dot"-edu
    

Google Scholar

Publications

PartNet: A Large-scale Benchmark for Fine-grained and Hierarchical Part-level 3D Object Understanding

Kaichun Mo, Shilin Zhu, Angel X. Chang, Li Yi, Subarna Tripathi, Leonidas Guibas, Hao Su
arXiv:1812.02713 [cs.CV]
pdf | video | webpage

Scan2CAD: Learning CAD Model Alignment in RGB-D Scans

Armen Avetisyan, Manuel Dahnert, Angela Dai, Manolis Savva, Angel X. Chang, Matthias Nießner
arXiv:1811.11187 [cs.CV]
pdf | video | webpage

Deep Convolutional Priors for Indoor Scene Synthesis

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

Text2Shape: Generating Shapes from Natural Language by Learning Joint Embeddings

Kevin Chen, Christopher B. Choy, Manolis Savva, Angel X. Chang, Thomas Funkhouser, Silvio Savarese
Proceedings of ACCV 2018, arXiv:1803.08495 [cs.CV]
pdf | code | webpage

MINOS: Multimodal Indoor Simulator for Navigation in Complex Environments

Manolis Savva, Angel X. Chang, Alexey Dosovitskiy, Thomas Funkhouser, Vladlen Koltun
arXiv:1712.03931 [cs.LG]
pdf | code | video | webpage

Im2Pano3D: Extrapolating 360 Structure and Semantics Beyond the Field of View

Shuran Song, Andy Zeng, Angel X. Chang, Manolis Savva, Silvio Savarese, Thomas Funkhouser
Proceedings of CVPR 2018, arXiv:1712.04569 [cs.CV]
pdf | webpage

Linking WordNet to 3D Shapes

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

Cross-modal Attribute Transfer for Rescaling 3D Models

Lin Shao, Angel X. Chang, Hao Su, Manolis Savva, Leonidas Guibas
Proceedings of 3DV 2017
pdf

Matterport3D: Learning from RGB-D Data in Indoor Environments

Angel X. Chang, Angela Dai, Thomas Funkhouser, Maciej Halber, Matthias Nießner, Manolis Savva, Shuran Song, Andy Zeng, Yinda Zhang
Proceedings of 3DV 2017, arXiv:1709.06158 [cs.CV]
pdf | webpage

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

ScanNet: Richly-annotated 3D Reconstructions of Indoor Scenes

Angela Dai, Angel X. Chang, Manolis Savva, Maciej Halber, Thomas Funkhouser, Matthias Nießner
Proceedings of CVPR 2017, arXiv:1702.04405 [cs.CV]
pdf | code | video | webpage

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, arXiv:1611.08974 [cs.CV]
pdf | webpage

A Two-stage Sieve Approach to Quote Attribution

Grace Muzny, Michael Fang, Angel X. Chang, Dan Jurafsky
Proceedings of EACL 2017
pdf | webpage

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

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

Eviza: A Natural Language Interface for Visual Analysis

Vidya Setlur, Sarah E. Battersby, Melanie Tory, Rich Gossweiler, Angel X. Chang
UIST 2016
pdf | webpage

PiGraphs: Learning Interaction Snapshots from Observations

Manolis Savva, Angel X. Chang, Pat Hanrahan, Matthew Fisher, Matthias Nießner
SIGGRAPH 2016
pdf | bib | webpage

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

Text to 3D scene generation

Angel X. Chang
Ph.D. dissertation, Department of Computer Science, Stanford University, 2015
pdf

ShapeNet: An Information-Rich 3D Model Repository

Angel X. Chang, Thomas Funkhouser, Leonidas Guibas, Pat Hanrahan, Qixing Huang, Zimo Li, Silvio Savarese, Manolis Savva, Shuran Song, Hao Su, Jianxiong Xiao, Li Yi, Fisher Yu
arXiv:1512.03012 [cs.GR], Dec 2015
pdf | bib | code | webpage

Generating Semantically Precise Scene Graphs from Textual Descriptions for Improved Image Retrieval

Sebastian Schuster, Ranjay Krishna, Angel X. Chang, Li Fei-Fei, Christopher D. Manning
In Proceedings of the Fourth Workshop on Vision and Language (VL15)
pdf | bib | webpage

Semantically-Enriched 3D Models for Common-sense Knowledge

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

Text to 3D Scene Generation with Rich Lexical Grounding

Angel X. Chang, Will Monroe, Manolis Savva, Christopher Potts, Christopher D. Manning
Proceedings of ACL 2015
pdf | bib | webpage

SceneGrok: Inferring Action Maps in 3D Environments

Manolis Savva, Angel X. Chang, Pat Hanrahan, Matthew Fisher, Matthias Nießner
Proceedings of SIGGRAPH Asia 2014
pdf | bib | webpage

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

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

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

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

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

TransPhoner: Automated Mnemonic Keyword Generation

Manolis Savva, Angel X. Chang, Christopher D. Manning, Pat Hanrahan
Proceedings of CHI 2014
pdf | bib | webpage

TokensRegex: Defining cascaded regular expressions over tokens

Angel X. Chang, Christopher D. Manning
Stanford University Technical Report
pdf | bib | webpage

Deterministic coreference resolution based on entity-centric, precision-ranked rules

Heeyoung Lee, Angel X. Chang, Yves Peirsman, Nathanael Chambers, Mihai Surdeanu, Dan Jurafsky
In Computational Linguistics 39(4)
pdf | webpage

Stanford's 2013 KBP System

Gabor Angeli, Arun 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

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.

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 | slides | post | data

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 | poster | data

Stanford's Multi-Pass Sieve Coreference Resolution System at the CoNLL-2011 Shared Task

Heeyoung Lee, Yves Peirsman, Angel X. Chang, Nathanael Chambers, Mihai Surdeanu, Dan Jurafsky
In Proceedings of the CoNLL-2011 Shared Task
pdf | bib | webpage

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

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

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