Xiangxu Meng

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Existing video object cutout systems can only deal with limited cases. They usually require detailed user interactions to segment real-life videos, which often suffer from both inseparable statistics (similar appearance between foreground and background) and temporal discontinuities (e.g. large movements, newly-exposed regions following disocclusion or(More)
To construct a multicast tree is the basis of multicast data transmission. The prime problem concerning the construction of a shared multicast tree is to determine the position of the root of the shared tree, which is the center selection problem. The selection of the center directly affects the structure of the tree, and affects the performance of(More)
We propose a new technique for reconstructing surfaces from a large set of unorganized 3D data points and their associated normal vectors. The surface is represented as the zero level set of an implicit volume model which fits the data points and normal constraints. Compared with variational implicit surfaces, we make use of surface normal vectors at data(More)
A grid-enabled workflow management system provides a set of tools to facilitate building high-level grid application services by orchestrating low-level grid services. BPEL (Business Process Execution Language) is the de facto standard in the Web service community. The purpose of this paper is to design and implement a workflow management system based on(More)
A museum guide system which is based on handheld devices (e.g. PDAs, short for Personal Digital Assistants) is presented in this paper. Radio-frequency identification (RFID) is used to navigate and get the index number of exhibit. Compared to traditional guide systems, such as tape or CD guide machine, this system provides visitors good visual and audio(More)
This paper introduces a grid-enabled and SOA-based SaaS application platform, which is named GridSaaS. The major contributions of the GridSaaS platform are: (1) construction of a value-added supply chain of SaaS applications; (2) adoption of grid technologies to deliver SaaS applications in high level maturity model; (3) rapid development and delivery of(More)
The rapid development of mobile devices and diversity of platforms require the adaptability and portability of the software. In order to automatically generate software interface on all kinds of mobile computing devices, the problem of dividing interface into screens automatically must be solved at first. This paper makes use of a constraint-based(More)
Software-as-a-service emerges as a new delivery model for the software development and applications. In multi-tenancy applications, tenants can customize and adjust the corresponding services shared by tenants based on their business requirements with strong elasticity and expansibility. As services do not exist independently, the resolving of service(More)
This paper mainly discusses how to design a virtual museum system used by many users at the same time, and how to manage the scene data. To a 3D indoor scene, the empty scene (only the building) without other objects such as collections can be created by sweeping a 2D polygon along an axis which is perpendicular to the horizontal plane. We can create the(More)