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Texture Map and Video Compression Using Beltrami Representation

• Lok Ming Lui, Ka Chun Lam, Tsz Wai Wong, Xianfeng Gu
• SIAM J. Imaging Sciences
• 2013

Surface parameterizations and registrations are important in computer graphics and imaging, where 1-1 correspondences between meshes are computed. In practice, surface maps are usually represented… (More)

FLASH: Fast Landmark Aligned Spherical Harmonic Parameterization for Genus-0 Closed Brain Surfaces

• Gary Pui-Tung Choi, Ka Chun Lam, Lok Ming Lui
• SIAM J. Imaging Sciences
• 2015

Surface registration between cortical surfaces is crucial in medical imaging for performing systematic comparisons between brains. Landmark-matching registration that matches anatomical features,… (More)

Landmark and Intensity Based Registration with Large Deformations via Quasi-conformal Maps

• Ka Chun Lam, Lok Ming Lui
• SIAM J. Imaging Sciences
• 2014

Registration, which aims to find an optimal one-to-one correspondence between different data, is an important problem in various fields. This problem is especially challenging when large deformations… (More)

Teichmuller Mapping (T-Map) and Its Applications to Landmark Matching Registration

• Lok Ming Lui, Ka Chun Lam, Shing-Tung Yau, Xianfeng Gu
• 2014

Dynamic zoning in elevator traffic control

• Wl Chan, Albert T. P. So, Ka Chun Lam
• 1997

Teichmüller extremal mapping and its applications to landmark matching registration

• Lok Ming Lui, Ka Chun Lam, Shing-Tung Yau, Xianfeng Gu
• ArXiv
• 2012

Registration, which aims to find an optimal 1-1 correspondence between shapes, is an important process in different research areas. Conformal mappings have been widely used to obtain a diffeomorphism… (More)

Large Deformation Registration via n-dimensional Quasi-conformal Maps

• Yin Tat Lee, Ka Chun Lam, Lok Ming Lui
• ArXiv
• 2014

We propose a new method to obtain registration between n-dimensional manifolds with very large deformations. Given a set of landmark correspondences, our algorithm produces an optimal diffeomorphism… (More)

Hitchbot - Delivering Malicious URLs via Social Hitch-Hiking

• Ka Chun Lam, Wing Cheong Lau, On-Ching Yue
• IEEE Global Telecommunications Conference…
• 2011

In order to spread malware more effectively, hackers have started to target popular social networking services (SNS) due to the inherent trust-relationship between the SNS users and the interactive… (More)

Genus-One Surface Registration via Teichmüller Extremal Mapping

• Ka Chun Lam, Xianfeng Gu, Lok Ming Lui
• MICCAI
• 2014

This paper presents a novel algorithm to obtain landmark-based genus-1 surface registration via a special class of quasi-conformal maps called the Teichmüller maps. Registering shapes with important… (More)

Landmark-Matching Transformation with Large Deformation Via n-dimensional Quasi-conformal Maps

• Yin Tat Lee, Ka Chun Lam, Lok Ming Lui
• J. Sci. Comput.
• 2016

We propose a new method to obtain landmark-matching transformations between n-dimensional Euclidean spaces with large deformations. Given a set of feature correspondences, our algorithm searches for… (More)

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