B. Comp., Ph.D.
Google Scholar | Google Patents | LinkedIn
Bio
Peter is a Software Engineer at Waymo. Prior to that he was at Google and a research fellow at the National University of Singapore (NUS).
Projects
At Waymo, Peter works on Simulation.
At Google, Peter worked on projects involving:
Large scale data processing.
Machine learning & data analysis.
Ads Quality
Develop quality metrics
Quality scoring
Quality signal engineering
User signals
Dialogue management systems
At NUS, Peter was the lead developer and researcher of the Singapore Eye Vessel Assessment (SIVA) System and related projects. These projects contributed to the Singapore President's Technology Award 2014 received by the team.
Ph.D. Thesis
Effective Reinforcement Learning for Collaborative Multi-Agent Domains
Abstract -- Online reinforcement learning (RL) in collaborative multi-agent domains is difficult in general. The number of available actions is exponential in the number of agents. This poses serious problems for online learning as exploration requirements are massive. Consequently, the learning system has lesser opportunities to exploit. Furthermore, the learning models for multiple agents can quickly become complex as the number of agents increase, and agents may have fluctuating communication links. To improve online exploration, we devise coordination guided RL (CGRL). CGRL employs expert knowledge of coordination as coordination constraints to dynamically guide exploration. Next, we present distributed CGRL for domains where communication links among agents fluctuate. Then, we introduce distributed relational temporal difference learning that greatly reduces the number of learning parameters for distributed RL. These methods improve learning performance in various domains. Last, we investigate an application of multi-agent learning to the real-world domain of automating retinal image analysis.
[PDF] [Link] [Supervisor]
Publications
George N Thomas, Shin-Yeu Ong, Yih Chung Tham, Wynne Hsu, Mong-Li Lee, Qiangfeng Peter Lau, Wan Ting Tay, Jessica Alessi-Calandro, Lauren AB Hodgson, Ryo Kawasaki, Tien Yin Wong, Carol Yim-lui Cheung.
Measurement of Macular Fractal Dimension Using a Computer-Assisted Program.
Investigative ophthalmology & visual science, 55(4), 2237-2243, Apr, 2014.
[Link]
Qiangfeng Peter Lau, Mong Li Lee, Wynne Hsu, Tien Yin Wong.
The Singapore Eye Vessel Assessment System.
Image Analysis and Modeling in Ophthalmology, 2014
[Link] [Google Books]
Qiangfeng Peter Lau, Mong Li Lee, Wynne Hsu, Tien Yin Wong.
Simultaneously Identifying All True Vessels from Segmented Retinal Images.
IEEE Transactions on Biomedical Engineering, 60(7), 1851-1858, Jul, 2013.
[Link]
Qiangfeng Peter Lau, Mong Li Lee, Wynne Hsu.
Muhammad Bayu Sasongko, Lauren AB Hodgson, Tien Y Wong, Ryo Kawasaki, Carol Y Cheung, Wynne Hsu, Mong Li Lee, Peter QF Lau, Paul Mitchell, Jie Jin Wang.
Correlation and Reproducibility of Retinal Vascular Geometric Measurements for Stereoscopic Retinal Images of the Same Eyes.
Ophthalmic Epidemiology, 19(5), 322-327, 2012
[Link]
Carol Yim-Lui Cheung, George Thomas, Wanting Tay, Kamran Ikram, Wynne Hsu, Mong Li Lee, Qiangfeng Peter Lau, Tien Yin Wong.
Retinal Vascular Fractal Dimension and its Relationship with Cardiovascular and Ocular Risk Factors.
American Journal of Ophthalmology, 154(4), 663--674, 2012.
[Link]
Qiangfeng Peter Lau, Mong Li Lee, Wynne Hsu.
Qiangfeng Peter Lau, Mong Li Lee, Wynne Hsu.
Carol Y-L Cheung, Wan T Tay, Paul Mitchell, Jie J Wang, Wynne Hsu, Mong L Lee, Qiangfeng P Lau, Ai L Zhu, Ronald Klein, Seang M Saw and Tien Y Wong.
Quantitative and qualitative retinal microvascular characteristics and blood pressure.
Journal of Hypertension, 29(7), 1380-1391, 2011.
[Pub Link]
Carol Yim-Lui Cheung, Yingfeng Zheng, Wynne Hsu, Mong Li Lee, Qiangfeng Peter Lau, Paul Mitchell, Jie Jin Wang, Ronald Klein, Tien Yin Wong.
Retinal Vascular Tortuosity, Blood Pressure, and Cardiovascular Risk Factors.
Ophthalmology, 118(5), 812-818, 2010.
[Pub Link]
Carol Yim-Lui Cheung, Wynne Hsu, Mong Li Lee, Jie Jin Wang, Paul Mitchell, Qiangfeng Peter Lau, Haslina Hamzah, Maisie Ho, Tien Yin Wong.
A New Method to Measure Peripheral Retinal Vascular Caliber over an Extended Area.
Microcirculation, 17(7), 495-503, 2010.
[Pub Link]
Victoria Cosatto, Gerald Liew, Elena Rochtchina, Alain Wainwright, Yong Ping Zhang, Wynne Hsu, Mong Li Lee, Qiangfeng Peter Lau, Haslina Hamzah, Paul Mitchell, Tien Yin Wong, Jie Jin Wang.
Retinal Vascular Fractal Dimension Measurement and its Influence from Imaging Variation: Results of Two Segmentation Methods.
Current Eye Research, 35(9), 850-856, 2010.
[Pub Link]
Wynne Hsu, Qiangfeng Peter Lau, Mong Li Lee.
Qiangfeng Peter Lau, Wynne Hsu, Judice L. Y. Koh, Mong Li Lee.
Qiangfeng Peter Lau, Wynne Hsu, Mong Li Lee, Ying Mao, Liang Chen.
Note: The Above Documents are meant for academic reference purposes only.