H.: Moving object extraction with a hand-held camera (2009)
Guofeng Zhang, Jiaya Jia, Wei Xiong, Tien-tsin Wong, Pheng-ann Heng, Hujun Bao
This paper presents a new method to detect and accurately extract the moving object from a video sequence taken by a hand-held camera. In order to extract the high quality moving foreground, previous...
Moving Object Extraction with a Hand-held Camera (2009)
Guofeng Zhang, Jiaya Jia, Wei Xiong, Tien-tsin Wong, Pheng-ann Heng, Hujun Bao
This paper presents a new method to detect and accurately extract the moving object from a video sequence taken by a hand-held camera. In order to extract the high quality moving foreground, previous...
3D User Interface Design for Computer Simulated Bronchoscopy \Lambda (2008)
Abstract We developed a computer simulation system for bronchoscopy with interactive navigation. This medical visualization system provides a virtual environment for simulating the actions of...
Manga Colorization, Yingge Qu, Tien-tsin Wong, Pheng-ann Heng
This paper proposes a novel colorization technique that propagates color over regions exhibiting pattern-continuity as well as intensitycontinuity. The proposed method works effectively on colorizing...
Intelligent Inferencing and Haptic Simulation for Chinese Acupuncture Learning and Training (2008)
Pheng-ann Heng, Tien-tsin Wong, Rong Yang, Yim-pan Chui, Yongming Xie, Kwong-sak Leung, ...
Abstract — This paper presents an intelligent virtual environment for Chinese acupuncture learning and training using state-of-the-art virtual reality technology. It is the first step towards...
Deringing Cartoons by Image Analogies (2008)
Guangyu Wang, Tien-tsin Wong, Pheng-ann Heng
In this article, we propose a novel method to reduce ringing artifacts in BDCT-encoded cartoon images using image analogies. The quantization procedure of BDCT compression (such as JPEG and MPEG)...
A Novel Feature Fusion Method Based on Partial Least Squares Regression (2008)
Quan-sen Sun, Zhong Jin, Pheng-ann Heng, De-shen Xia
Abstract. The partial least squares (PLS) regression is a new multivariate data analysis method. In this paper, based on the ideas of PLS model and feature fusion, a new non-iterative PLS algorithm...
Support Vector Clustering for Brain Activation Detection (2008)
Defeng Wang, Lin Shi, Daniels. Yeung, Pheng-ann Heng, Tien-tsin Wong
Abstract. In this paper, we propose a new approach to detect activated time series in functional MRI using support vector clustering (SVC).We extract Fourier coefficients as the features of fMRI time...
Tim Poston, Tien-tsin Wong, Pheng-ann Heng
An isosurface extraction algorithm which can directly generate multiresolution isosurfaces from volume data is introduced. It generates low resolution isosurfaces, with 4 to 25 times fewer triangles...
Leung, Man-Kang, Pang, Wai-Man, Fu, Chi-Wing, Wong, Tien-Tsin, Heng, Pheng-Ann
This paper presents a modular framework to efficiently apply the bidirectional texture functions (BTF) onto object surfaces. The basic building blocks are the BTF tiles. By constructing one set of...
Shape modeling using automatic landmarking (2005)
Abstract. This paper describes a novel approach to automatically recover accurate correspondence over various shapes. In order to detect the features points with the capability in capturing the...
Heuristic optimization; Simulated annealing; (2003)
Kup-sze Choi, Hanqiu Sun, Pheng-ann Heng, Haptic Rendering
medical applications
The Plenoptic Illumination Function (2002)
Tien-tsin Wong, Chi-wing Fu, Chi-wing Fu, Pheng-ann Heng, Pheng-ann Heng, Chi-sing Leung, ...
Image-based modeling and rendering has been demonstrated as a cost-effective and efficient approach to virtual reality applications. The computational model that most image-based techniques are based...
Clustering Categorical Data (2000)
Yi Zhang, Fu Chun, Chun Hing Cai, Pheng-ann Heng
Clustering has typically been a problem related to numerical data. However, in databases, oftentimes the data values are categorical and cannot be assigned meaningful numerical substitutes. With the...
Winner-Take-All Discrete Recurrent Neural Networks (2000)
Yi Zhang, Pheng-ann Heng, Ping-fu Fung
This paper proposes a discrete recurrent neural network model to implement winnertake -all function. This network model has simple organizations and clear dynamic behaviours. The dynamic properties...
Direct Haptic Rendering of Isosurface by Intermediate Representation (2000)
Kwong-wai Chen, Pheng-Ann Heng, Hanqiu Sun
With the developmentofvolume visualization methods, we can easily extract meaningful information from volumetric data using interactive graphics and imaging. Haptic interaction of volumetric data...
Computing visibility for triangulated panoramas (1999)
Chi-wing Fu, Tien-tsin Wong, Pheng-ann Heng
Abstract. A visibility algorithm for triangulated panoramas is proposed. The algorithm can correctly resolve the visibility without making use of any depth information. It is especially useful when...
Efficient volume rendering by isoregion leaping acceleration (1998)
This paper introduces a new acceleration technique for ray casting type volume rendering called IsoRegion Leaping. A factorization of the sample composition equation leads to our new algorithm which...
Triangle-based View Interpolation Without Depth-Buffering (1998)
Chi-wing Fu, Tien-tsin Wong, Pheng-ann Heng
In this paper, we propose a triangle-based view interpolation algorithm which can correctly resolve the visibility problem without depth-buffering. The algorithm is especially useful when depth...
Efficient volume rendering by isoregion leaping acceleration (1998)
This paper introduces a new acceleration technique for ray casting type volume rendering called IsoRegion Leaping. A factorization of the sample composition equation leads to our new algorithm which...
Accurate B-spline freeform deformation of polygonal objects (1998)
Jieqing Feng, Pheng-ann Heng, Tien-tsin Wong
Free-form deformation is an important geometric shape modification method in computer animation and geometric modeling. We explore it by means of functional composition via shifting operators. Our...
Triangle-based View Interpolation Without Depth-Buffering (1998)
Chi-Wing Fu, Tien-tsin Wong, Pheng-ann Heng
In this paper, we propose a triangle-based view interpolation algorithm which can correctly resolve the visibility problem without depth-buffering. The algorithm is especially useful when depth...
Accurate B-spline freeform deformation of polygonal objects (1998)
Jieqing Feng, Pheng-ann Heng, Tien-tsin Wong
Free-form deformation is an important geometric shape modification method in computer animation and geometric modeling. We explore it by means of functional composition via shifting operators. Our...
Interactive Volume Cutting (1998)
Wong Tommy, Yu-hang Siu, Pheng-ann Heng, Hanqiu Sun
In 2D, Intelligent Scissors is an efficient interactive tool for image segmentation. By interactive use of a dynamic-programming graph-searching algorithm, a region of interest in the image can be...
Image-based Rendering with Controllable Illumination (1997)
Tien-tsin Wong, Pheng-ann Heng, Siu-Hang Or, Wai-yin Ng
: A new image-based rendering method, based on the light field and Lumigraph system, allows illumination to be changed interactively. It does not try to recover or use any geometrical information...
Principal Stream Surfaces (1997)
The use of stream surfaces and streamlines is well established in vector visualization. However, the proper placement of starting points is critical for these constructs to clearly illustrate the...
Zhang, Shao-Xiang, Heng, Pheng-Ann, Liu, Zheng-Jin, Tan, Li-Wen, Qiu, Ming-Guo, Li, Qi-Yu, ...
We report the availability of a digitized Chinese male and a digitzed Chinese female typical of the population and with no obvious abnormalities. The embalming and milling procedures incorporate...
Zhang, Shao-Xiang, Heng, Pheng-Ann, Liu, Zheng-Jin, Tan, Li-Wen, Qiu, Ming-Guo, Li, Qi-Yu, ...
We report the availability of a digitized Chinese male and a digitzed Chinese female typical of the population and with no obvious abnormalities. The embalming and milling procedures incorporate...