Zhan Shou-yi

Beijing Institute of Technology

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i-10 index

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Fengxia Li

University of Science and Technology Beijing

Hong-Yi Su

National Institute for Radiological Protection

Tianyu Huang

Civil Aviation Flight University of China

Yanlong Zhai

Beijing Institute of Technology

Jiguo Zeng

Jiangxi Normal University

Hanbing Liu

Tsinghua University

Yan Zhang

Beijing Institute of Technology

Chen Liu

Southern University of Science and Technology

Jianyuan Min

Google (Canada)

Linqin Guo

Cooperative Institutions

Beijing Institute of Technology

Tsinghua University

Harbin Institute of Technology

Beihang University

University of Science and Technology Beijing

Shanghai Jiao Tong University

Peking University

Huazhong University of Science and Technology

Xidian University

University of Electronic Science and Technology of China

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A Real-time Interactive Tool for Image Cutout

Eurographics (2009)

Chen Liu Fengxia Li Yan Zhang Zhan Shou-yi

10.2312/egs.20091055

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Interactive dynamic graph cut based image segmentation with shape priors

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2007)

Chen Liu Fengxia Li Zhan Shou-yi

In this paper, we present a new method bases on dynamic graph cut and captures both the shape and the nature information of the image for interactive image segmentation. While traditional interactive graph cut approaches for image segmentation are often successful, they may fail in camouflage. Prior shape knowledge can largely mitigate this problem. In this paper, two kinds of shape priors are taken into account to obtain more accurate results. In order to use the information from user input more effectively, a weight function is introduced to control the relative importance of shape knowledge. Then, a one-shot fully dynamic graph cut algorithm is introduced to minimize the energy function, and during this procedure, only a subset of pixels in the image is considered, which greatly reduces the complexity of dynamic graph cut algorithm. Extensive experiments, including comparisons with some state-of-the-arts, show the effectiveness of our methods in improving the segmentation performance and saving the processing time.

Cut

Camouflage

Segmentation-based object categorization

10.1117/12.749684

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Efficient view-dependent rendering of terrains

Graphics Interface (2001)

Yadong Wu Yushu Liu Zhan Shou-yi Xiao-Chun Gao

Though considerable progress has been made with the view-dependent techniques in terrain visualization, the CPU overhead still precludes their wide application in many domains. The calculation complexity of view-dependent techniques mainly involves the calculation of node screen space error every frame, including the time-consuming screen space projection, the number of nodes whose projection error remains to be updated, and the evaluation of the valid life of the projection error. In this paper we introduce block-priority-based traversal of quadtree for reducing the traversal complexity and propose view-angle-based error metrics. Thus we successfully speed up the valid life evaluation of projection error by means of calculating the spatial relation between the viewpoint and a simplified split zone. In addition, constant frame rate has been achieved by scaling the split zone accordingly. Corresponding experimental results have shown that our methods can real-time render large scale terrain on a low-cost PC so as to satisfy the demand of most applications in this way.

Quadtree

Frame rate

Shader

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Simultaneous pose motion recovery and video object cutout

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2009)

Chen Liu Fengxia Li Tianyu Huang Zhan Shou-yi

In this paper, we present a novel system for simultaneously performing segmentation and 2D pose motion recovery for the articulated object in a video sequence. The system first preprocesses pixels into superpixels to reduce the number of nodes which largely affects the computational complexity of later optimizations. By starting from true pose estimation obtained with user assistants on each key frame, a parallel pose tracking procedure, whose energy function considers boundary, appearance and pose prior information as well, is conducted forward and backward on in-between frames. With different searching strategies, multiple pose candidates are inferred to help recover missed true poses. Finally, by solving the cost function of the pose motion recovery, which exploits the temporal coherence of object movement, the pose motion and the video object are produced at the mean time. As a parameterized tree-based articulated model drawn by the user is applied to denote the pose, our method is generic and can be used for any articulated object.

10.1117/12.832648

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Automatical Object Detection and Extraction in Real-world Image

Jisuanji gongcheng (2009)

Zhan Shou-yi

This paper introduces a matting model based on exemplar to realize automatical training and detection in real-world image.Combined with spatial histogram of visual words improve the performance of order less bag-of-features image representation.Background and foreground information can be got automatically from the phase of localization.It uses graph-cut technique to accomplish matting automatically.The test results on Pascal VOC2006 test set show that the detection rate of this method is high,and its automatically matting effect is as well as existing interactive image cutout tool.

Pascal (unit)

Standard test image

Cut

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Spacecraft Tracking Visualizing System Base On Real Time Tracking Data

Jisuanji fangzhen (2008)

Hongmin Chen Zhan Shou-yi

With the development of aerospace industry,the requirement of spacecraft tracking visualizing technique is escalating.Base on the first Circumlunar-detecting-project CE-1 of our country,in this paper we discuss the functions that visualizing system drove by real time data should achieve.And in order to resolve the disadvantage in real time visualizing system such as lack of adaptability and functional agility,we propose a general method to design the Observer of Spacecraft Tracking Visualizing System.Using this method we can get agile and changeful Observer in Spacecraft Tracking Visualizing System.

Tracking system

Adaptability

Tracking (education)

Base (topology)

Observer (physics)

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Development of roaming-a-city system based on OpenGVS

Jisuanji gongcheng (2005)

Zhan Shou-yi

An interactive 3D roaming-a-city system was developed with OpenGVS. Some key technologies in it, such as editing scene using three-dimensional viewing, collision detection with measuring the specific line segments, simulating natural phenomena in use of callback functions, making the mathematics model of movement equations, were discussed.

Roaming

Callback

Line (geometry)

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Real-Time and Realistic Simulation of Large-Scale Deep Ocean Surface

Lecture notes in computer science (2006)

Xin Zhao Fengxia Li Zhan Shou-yi

10.1007/11941354_71

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Image Classification Technology Based on Mining of Frequent Item Sets

Chinese Conference on Pattern Recognition (2008)

Qing Nie Zhan Shou-yi Jing-Xia Su

We propose a novel method to detect frequent and distinctive feature configuration on a class instance. Each neighborhood of a local feature is described by a list of nonzero indices, and generates a transaction. An efficient mining of frequent item sets algorithm is used to automatically find spatial configurations of local features occurring frequently on a class instance. These mined spatial configurations can be used as special words, incorporate into bag of features classification model. Through evaluation on PASCAL 2007 Visual Recognition Challenge dataset set, the test results show that this mining algorithm is computationally efficient and allows to process large training sets rapidly. Moreover, the mined feature configurations have higher discriminative power compare to individual features.

Pascal (unit)

Discriminative model

Feature (linguistics)

Contextual image classification

10.1109/ccpr.2008.36

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Grid-enable technology of utility software

Computer Integrated Manufacturing Systems (2005)

Zhan Shou-yi

Resource-oriented architecture

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