Dong Xu, Shuicheng Yan, Dacheng Tao, Stephen Lin, Hong-jiang Zhang
Abstract—Dimensionality reduction algorithms, which aim to select a small set of efficient and discriminant features, have attracted great attention for human gait recognition and content-based...
Eurographics Symposium on Rendering (2005) (2008)
Kavita Bala, Philip Dutré (editors, Multiresolution Reflectance Filtering, Ping Tan, Stephen Lin, Long Quan, ...
Physically-based reflectance models typically represent light scattering as a function of surface geometry at the pixel level. With changes in viewing resolution, the geometry imaged within a pixel...
The Visual Computer manuscript No. (will be inserted by the editor) (2008)
Ying Song, Yanyun Chen, Xin Tong, Stephen Lin, Jiaoying Shi, Baining Guo, ...
Abstract The appearance of an inhomogeneous translucent material depends substantially on its volumetric variations and their effects upon subsurface scattering. For efficient rendering that accounts...
The Visual Computer manuscript No. (will be inserted by the editor) (2008)
Jiaping Wang, Kun Xu, Kun Zhou, Stephen Lin, Shimin Hu, Baining Guo
Abstract In this paper, we present a new SH operation, called spherical harmonics scaling, to shrink or expand a spherical function in frequency domain. We show that this problem can be elegantly...
Abstract Precomputed Shadow Fields for Dynamic Scenes (2008)
Kun Zhou, Yaohua Hu, Stephen Lin, Baining Guo, Heung-yeung Shum
We present a soft shadow technique for dynamic scenes with moving objects under the combined illumination of moving local light sources and dynamic environment maps. The main idea of our technique is...
Separating Reflections in Human Iris Images for Illumination Estimation (2008)
A method is presented for separating corneal reflections in an image of human irises to estimate illumination from the surrounding scene. Previous techniques for reflection separation have...
Element Rearrangement for Tensor-Based Subspace Learning (2008)
Shuicheng Yan, Dong Xu, Stephen Lin, Thomas S. Huang, Shih-fu Chang
The success of tensor-based subspace learning depends heavily on reducing correlations along the column vectors of the mode-k flattened matrix. In this work, we study the problem of rearranging...
AN ADAPTIVE MULTIRESOLUTION APPROACH TO FINGERPRINT RECOGNITION (2008)
Amina Chebira, Luis P. Coelho, Aliaksei S, Stephen Lin, William G. Jenkinson, Jeremiah Macsleyne, ...
We propose an adaptive multiresolution (MR) approach to the classification of fingerprint images. The system adds MR decomposition in front of a generic classifier consisting of feature computation...
Interactive Relighting with Dynamic BRDFs (2008)
Xin Sun, Kun Zhou, Yanyun Chen, Stephen Lin, Jiaoying Shi, Baining Guo
Figure 1: Image sequence of Venus rendered with a dynamic BRDF. Ground truth renderings of the corresponding materials are shown on spheres at the bottom-right of the images. The changes in Venus ’...
Eurographics Symposium on Rendering (2005) (2008)
Kavita Bala, Philip Dutré (editors, Multiresolution Reflectance Filtering, Ping Tan, Stephen Lin, Long Quan, ...
Physically-based reflectance models typically represent light scattering as a function of surface geometry at the pixel level. With changes in viewing resolution, the geometry imaged within a pixel...
Lifeng Wang, Stephen Lin, Seungyong Lee, Baining Guo, Heung-yeung Shum, Senior Member
Abstract — We present a 2D feature-based technique for morphing 3D objects represented by light fields. Existing light field morphing methods require the user to specify corresponding 3D feature...
Graph embedding and extension: A general framework for dimensionality reduction (2007)
Shuicheng Yan, Dong Xu, Benyu Zhang, Hong-jiang Zhang, Qiang Yang, Senior Member, ...
Abstract—Over the past few decades, a large family of algorithms—supervised or unsupervised; stemming from statistics or geometry theory—has been designed to provide different solutions to the...
Resolution-enhanced photometric stereo (2006)
Ping Tan, Stephen Lin, Long Quan
Abstract. Conventional photometric stereo has a fundamental limitation that the scale of recovered geometry is limited to the resolution of the input images. However, surfaces that contain sub-pixel...
Determining the radiometric response function from a single grayscale image (2005)
A method is presented for computing the radiometric response function of a camera from a single grayscale image. While most previous techniques require a set of registered images with different...
Modeling and rendering of quasi-homogeneous materials (2005)
Xin Tong, Jiaping Wang, Stephen Lin, Baining Guo, Heung-yeung Shum
Many translucent materials consist of evenly-distributed heterogeneous elements which produce a complex appearance under different lighting and viewing directions. For these quasi-homogeneous...
Face alignment under variable illumination (2004)
Yuchi Huang, Stephen Lin, Stan Z. Li, Hanqing Lu, Heung-yeung Shum
This paper presents an approach to face alignment under variable illumination, an obstacle largely ignored in previous 2D alignment work. To account for illumination variation, our method employs two...
Radiometric calibration from a single image (2004)
Stephen Lin, Jinwei Gu, Shuntaro Yamazaki, Heung-yeung Shum
Photometric methods in computer vision require calibration of the camera’s radiometric response, and previous works have addressed this problem using multiple registered images captured under...
Estimating intrinsic images from image sequences with biased illumination (2004)
Yasuyuki Matsushita, Stephen Lin, Sing Bing Kang, Heung-yeung Shum
Abstract. We present a method for estimating intrinsic images from a fixed-viewpoint image sequence captured under changing illumination directions. Previous work on this problem reduces the...
Face alignment under variable illumination (2004)
Yuchi Huang, Stephen Lin, Stan Z. Li, Hanqing Lu, Heung-yeung Shum
This paper presents an approach to face alignment under variable illumination, an obstacle largely ignored in previous 2D alignment work. To account for illumination variation, our method employs two...
Radiometric Calibration from a Single Image (2004)
Stephen Lin Jinwei, Stephen Lin, Jinwei Gu, Shuntaro Yamazaki, Heung-yeung Shum
Photometric methods in computer vision require calibration of the camera's radiometric response, and previous works have addressed this problem using multiple registered images captured under...
Estimating intrinsic images from image sequences with biased illumination (2004)
Yasuyuki Matsushita, Stephen Lin, Sing Bing Kang, Heung-yeung Shum
Abstract. We present a method for estimating intrinsic images from a fixed-viewpoint image sequence captured under changing illumination directions. Previous work on this problem reduces the...
Highlight Removal by Illumination-Constrained Inpainting (2003)
Ping Tan, Stephen Lin, Long Quan, Heung-yeung Shum
We present a single-image highlight removal method that incorporates illumination-based constraints into image inpainting. Unlike occluded image regions filled by traditional inpainting, highlight...
Highlight Removal by Illumination-Constrained Inpainting (2003)
Ping Tan, Stephen Lin, Long Quan, Heung-yeung Shum
We present a single-image highlight removal method that incorporates illumination-based constraints into image inpainting. Unlike occluded image regions filled by traditional inpainting, highlight...
Sing Bing Kang, Stephen Lin, Xin Tong
Densely-sampled image representations such as the light field or Lumigraph have been effective in enabling photorealistic image synthesis. Unfortunately, lighting interpolation with such...
Realistic rendering and animation of knitwear (2003)
Yanyun Chen, Stephen Lin, Hua Zhong, Ying-qing Xu, Baining Guo, Heung-yeung Shum
We present a framework for knitwear modeling and rendering that accounts for characteristics that are particular to knitted fabrics. We first describe a model for animation that considers knitwear...
Sing Bing Kang, Stephen Lin, Xin Tong
Densely-sampled image representations such as the light field or Lumigraph have been effective in enabling photorealistic image synthesis. Unfortunately, lighting interpolation with such...
Multiple-cue illumination estimation in textured scenes (2003)
Yuanzhen Li, Stephen Lin, Hanqing Lu, Heung-yeung Shum
In this paper, we present a method that integrates cues from shading, shadow and specular reflections for estimating directional illumination in a textured scene. Texture poses a problem for lighting...
Diffuse-specular separation and depth recovery from image sequences (2002)
Stephen Lin, Yuanzhen Li, Sing Bing Kang, Xin Tong, Heung-yeung Shum
Abstract. Specular reflections present difficulties for many areas of computer vision such as stereo and segmentation. To separate specular and diffuse reflection components, previous approaches...
Diffuse-specular separation and depth recovery from image sequences (2002)
Stephen Lin, Yuanzhen Li, Sing Bing Kang, Xin Tong
Abstract. Specular reflections present difficulties for many areas of computer vision such as stereo and segmentation. To separate specular and diffuse reflection components, previous approaches...
This study investigates whether a broader range of financial performance measures as required by "FRS No.3" ("FRS3") provides incremental price information beyond a single earnings-based performance...
This study investigates whether a broader range of financial performance measures as required by "FRS No.3" ("FRS3") provides incremental price information beyond a single earnings-based performance...
"This study examines the long-run return performance following UK corporate sell-off announcements. We observe significant negative abnormal returns up to five years subsequent to sell-off...
Chan, Ann L-C, Lee, Edward, Lin, Stephen
We exploit a unique setting of accounting regulation change to examine how accounting information quality affects the well-documented accrual anomaly. We show a significant reduction in the negative...