2D/3D Packing based on LFF (Less Flexibility First) principle

This project address various types of spatio-temporal aggregate queries, including those related to k nearest neighbor search, and joining multiple datasets. The goal is to develop specialized algorithms and space-efficient data structures for answering these queries accurately.

We propose a novel approach to recover a high-quality image by exploiting the tradeoff between exposure time and motion blur, which considers color statistics and spatial constraints simultaneously, by using only two defective input images.

The BitTorrent (BT) file sharing protocol is very popular due to its scalability property and the built-in incentive mechanism to reduce free-riding. In this project, we consider various enhancement to drastically improve the scalability and performability of BT-like protocols.

In this paper, we propose a novel method to reduce ringing artifacts in BDCT-encoded cartoon images using image analogies.

The CUPIDE (Chinese University Plagiarism IDentification Engine) System is a new generation plagiarism detection software designed for promoting and upholding academic honesty in academic institutions. The system supports English, traditional and simplified Chinese, and provides a user-friendly web interface for class assignment management and submissions.

Silicon synthesis for Deep-Submicron technology, particularly on pre-analyzed pattern based Circuit Rewiring and Logic Synthesis techniques and systems.

This paper presents a SIMD algorithm that performs the convolution-based DWT completely on a GPU, which brings us significant performance gain on a normal PC without extra cost.

We present a user-friendly system for seamless image composition, called drag-and-drop pasting, using Poisson image editing with optimized boundary and preservation of fractional boundary.

γ-ton tracing is a visual simulation framework for a wide variety of weathering effects. In this framework, blemishes (e.g. rust, stain, patina, etc) are formed by the cumulative propagation of an abstract weathering-catalysing agent called γ-ton. The propagation of γ-ton resembles the photon mapping. Therefore, once you know how to do photon mapping, you can simulate weathering.

This paper discusses a new image-based rendering method, based on the light field and Lumigraph system, which allows illumination to be changed interactively.

This paper presents an image stitching method using global and local intensity alignment. The key to our modeless approach is the estimation of global and local replacement functions, by reducing the complex estimation problem to the robust 2D tensor voting in the corresponding voting spaces.

Traditional Peer-to-Peer (P2P) networks do not provide service differentiation and incentive for users. Consequently, users can easily access information without contributing any information or service to a P2P community. This leads to the ``free-riding'' problem and consequently, most of the information requests are directed toward a small number of P2P nodes. This work provides an effective mean to have incentive and service differentiation in P2P networks.

A robust synthesis method is proposed to automatically infer missing color and texture information from a damaged 2D image by ND tensor voting (N >3).

Georeferened information is further enhanced by the realistic, high-resolution and consistent model using as wide a range of information sources as possible.  The environmental information will be seamlessly fused with other types of digital sources, which creates the virtual space for advanced decision making based on explosive visualization.

This paper presents a colorization technique that relies on the pattern-continuity as well as the intensity-continuity. Hence it can naturally colorize the pattern-intensive manga.

In this research, we investigate and propose a novel methodology to analytically compute the throughput capacity, or the maximum end-to-end throughput of a given source and destination pair in a multi-hop wireless network. The utility of this model will assist one to design admission control and offered load control protocols.

SoC IP Core designs for optimal group communication networks, new FPGA siwtching boxes, architectures (Our home-brew (manual design) FPGA chip design example), SoC On-Chip-Networks and related CAD tools.

In the past few years, overlay networks have received much attention but there has been little study on the `` interaction'' of multiple, co-existing overlays on top of a physical network. We are the first to study this interaction and to discover the implications of this interaction through mathematical approach.

We formulate the problem of natural image matting as one of solving Poisson equations with the matte gradient field.

File distribution via network coding has received a lot of attention lately. However, direct application of network coding may have security problems. We propose a new batch delivery and verification scheme that is similar to the classical scenario where the authentication information of a message is embedded with the message and is sufficient for the verification purpose.

Cooperative networks, in particular, P2P or overlay networks, have caught much attention in recent years.However, most cooperative systems assume that peers are "voluntary" to contribute. We propose an innovative approach to provide incentive and to encourage mutual caching so as to enhance performance.

The aim of this project is to eliminate the linearity assumption of object motions in spatiotemporal database by developing techniques that support effective retrieval of objects with diverse motion patterns that are unknown in advance.

Our objective is to develop new approaches to render complex virtual scenes at interactive rates by investigating the visibility culling, level-of-detail, and image-based rendering techniques systematically.

This paper presents a complete system capable of synthesizing a large number of pixels that are missing due to occlusion or damage in an uncalibrated input video.

We are working on research projects including:

• Image-based Modeling & Rendering of Complex Virtual Scenes;
• Interactive Haptic Sculpting in Surface/Volume Spaces;
• Hardware-assisted Realistic Fur Simulation;
• Montage Mesh Fusion Using Functional Blending.

Distributed wireless mesh network technology is ready for public deployment in the near future. Yet without an incentive system, one should not assume private, self-interested wireless nodes to cooperate in the packet forwarding service. This work studies the use of pricing as a mechanism to encourage nodes to participate in a wireless mesh network.