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Microscopic Halftone image Segmentation

Journal of Donghua University(English Edition) 2004年第5期21卷 83-87页

作者：王永刚杨杰丁永生 Institute of Image Processing & pattern Recognition Shanghai Jiaotong University Shanghai 200030 Dr Institute of Image Processing & pattern Recognition Shanghai Jiaotong University Shanghai 200030 College of Information Science and Technology Donghua University Shanghai 200051 Digitized Textile & Fashion Technology Engineering Research Center of National Education Ministry Donghua University Shanghai 200051

Microscopic halftone image recognition and analysis can provide quantitative evidence for printing quality control and fault diagnosis of printing devices, while halftone image segmentation is one of the significant steps during the procedure. Automatic segmentation on microscopic dots by the aid of the Fuzzy C-Means (FCM) method that takes account of the fuzziness of halftone image and utilizes its color information adequately is realized. Then some examples show the technique effective and simple with better performance of noise immunity than some usual methods. In addition, the segmentation results obtained by the FCM in different color spaces are compared, which indicates that the method using the FCM in the f 1f 2f 3 color space is superior to the rest.

关键词： image segmentation color halftone printing FCM color space

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A fast VLSI architecture for two-dimensional discrete wavelet transform based on lifting scheme

A fast VLSI architecture for two-dimensional discrete wavele...

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2004 7th International Conference on Solid-State and Integrated Circuits Technology Proceedings, ICSICT 2004

作者： Xiong, Chengyi Tian, Jinwen Liu, Jian Institute of Pattern Recognition and Artificial Intelligence Key Laboratory of Eduaction Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China College of Electronic Information Engineering South-Center University for Nationalities Wuhan 430074 China

This paper proposes a novel fast architecture for two-dimensional discrete wavelet transform by using lifting scheme. The parallel and embedded decimation techniques are employed to optimize the architecture, which is mainly composed of two horizontal filter modules and one vertical filter module, working in parallel and pipeline fashion with 100% hardware utilization. The architecture is designed to generate two outputs at one working clock cycle, with every two subbands coefficients alternately. The total time of computing J levels of decomposition for N×N image is approximately 2N2(I-4 J)/3 clock cycles. In comparison with the other devices reported in previous literature, the design has many advantages including lower hardware complexity and area and power efficient. The design is also fast, regular and simple, as well as well suited for VLSI implementation. © 2004 IEEE.

关键词： VLSI circuits

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3D displacement fields estimation of three-dimensional cardiac echocardiographic images based on elliptic partial differential equation

3D displacement fields estimation of three-dimensional cardi...

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International Conference on Signal processing Proceedings (ICSP)

作者： Guo Qiang Yang Xin Yao Liping Sun Kun Institute of Image Processing & Pattern Recognition Shanghai Jiaotong University China Children's Medical Center Xinhua Hospital Shanghai Second Medical University China

Three-dimensional echocardiography is a promising technique for quantitative analysis of heart functions because it can visualize the complex structure of the hearts intuitively. Within this new technical how to describe the motion of some part of the heart quantitatively is meaningful. This paper proposes a method of 3D motion estimation based on elliptic partial differential equation. It detects the displacement fields instead of the optical flow fields, which needs calibrated for. First a new quadratic error functional is proposed in this paper; then, it leads to a set of elliptic partial differential equations by variation calculus. Using finite difference method, this algorithm is possible to evaluation the motion of mitral valve.

关键词： Partial differential equations Heart Valves Blood image motion analysis Sun Hospitals Medical treatment Echocardiography Differential equations

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FVC2004: Third fingerprint verification competition 1

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1st International Conference on Biometric Authentication, ICBA 2004

作者： Maio, Dario Maltoni, Davide Cappelli, Raffaele Wayman, Jim L. Jain, Anil K. Biometric System Lab - DEIS University of Bologna via Sacchi 3 Cesena47023 Italy Biometric Test Center College of Engineering San Jose State University San JoseCA95192 United States Pattern Recognition and Image Processing Laboratory Michigan State University East LansingMI48824 United States

ISBN: (数字)9783540259480

ISBN: (纸本)3540221468

A new technology evaluation of fingerprint verification algorithms has been organized following the approach of the previous FVC2000 and FVC2002 evaluations, with the aim of tracking the quickly evolving state-ofthe- art of fingerprint recognition systems. Three sensors have been used for data collection, including a solid state sweeping sensor, and two optical sensors of different characteristics. The competition included a new category dedicated to "light" systems, characterized by limited computational and storage resources. This paper summarizes the main activities of the FVC2004 organization and provides a first overview of the evaluation. Results will be further elaborated and officially presented at the International Conference on Biometric Authentication (Hong Kong) on July 2004. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Digital storage

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A fast VLSI architecture for two-dimensional discrete wavelet transform based on lifting scheme [image compression applications]

A fast VLSI architecture for two-dimensional discrete wavele...

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International Conference on Solid-State and Integrated Circuit Technology

作者： Chengyi Xiong Jinwen Tian Jian Liu College of Electronic Information Engineering South-Center University of Science and Technology Wuhan China Institute of Pattern Recognition & Artification Intelligence Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)078038511X

This paper proposes a novel fast architecture for a 2D discrete wavelet transform by using a lifting scheme, Parallel and embedded decimation techniques are employed to optimize the architecture, which is mainly composed of two horizontal filter modules and one vertical filter module, working in parallel and pipeline fashion with 100% hardware utilization. The architecture is designed to generate two outputs in one working clock cycle, with every two subbands coefficients alternately. The total time for computing J levels of decomposition for an N/spl times/N image is approximately 2N/sup 2/(1-4/sup -J/)/3 clock cycles. In comparison with the other devices reported in previous literature, the design has many advantages including lower hardware complexity and area and power efficiency. The design is also fast, regular and simple, as well as well suited for VLSI implementation.

关键词： Discrete wavelet transforms Very large scale integration Filters Computer architecture Wavelet transforms Hardware Clocks image coding Matrix converters Pipelines

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Building and registering parameterized 3D models of vessel trees for visualization during intervention

Building and registering parameterized 3D models of vessel t...

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International Conference on pattern recognition

作者： G. Langs P. Radeva D. Rotger F. Carreras Insitute for Computer Graphics and Vision Graz University of Technology Graz Austria Pattern Recognition and Image Processing Group Vienna University of Technology Vienna Austria Computer Vision Center Universitat Autònoma de Barcelona Bellaterra Spain Hospital St. Pau Barcelona Spain

In this paper, we address the problem of multimodal registration of coronary vessels by developing a 3D parametrical model of vessel trees from computer tomography data and registering it to angiography images during intervention. Thus, the interventionist takes profit from 3D data otherwise only available before the intervention. This facilitates orientation in ambiguous radiographs, interactive visualization of all vessel structures to estimate their mutual position and navigation within the vessel system and ultimately reduces the radiation the patient and the physicians are exposed to. The model is build by exploring the branching vessel tree starting from a single position and successively expanding through the vessels guided by a local deformable surface. The result is a tree of cylindrical segments each adapted to the vessel walls that is registered to angiography images in a fast and robust way. Validation on 8 patients confirms the robustness of our method.

关键词： X-ray imaging Computed tomography Robustness Angiography image segmentation image reconstruction Distortion measurement Tree graphs Data visualization Radio navigation

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Microscopic Halftone image Segmentation

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Journal of Donghua University(English Edition) 2004年第5期000卷

作者： WANG Yong-gang YANG Jie DING Yong-sheng WANG Yong-gang(Institute of Image Processing & pattern Recognition Shanghai Jiaotong University Shanghai 200030) YANG Jie(College of Information Science and Technology Donghua University Shanghai 200051 Digitized Textile & Fashion Technology Engineering Research Center of National Education Ministry Donghua University Shanghai 200051)

关键词： image segmentation color halftone printing FCM color space

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Autonomous optical navigation for interplanetary exploration based on information of earth-moon

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Journal of Harbin Institute of Technology(New Series) 2003年第3期10卷 343-348页

作者：吴伟仁田玉龙黄翔宇 Institute for Pattern Recognition and Artificial Intelligence State Key Lab. for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China Deep Space Exploration Research Center Harbin Institute of Technology Harbin 150001 Chinahe image elements of earth-center and moon-center are obtained by processing the images of earth and moon these image elements in combination with the inertial attitude information and the moon ephemeris are utilized to obtain the probe initial position relative to earth and the Levenberg-Marquardt algorithm is used to determine the accurate probe position relative to earth and the probe orbit relative to earth is estimated by using the extended Kalman filter. The autonomous optical navigation algorithm is validated using the digital simulation.

The image elements of earth-center and moon-center are obtained by processing the images of earthand moon, these image elements in combination with the inertial attitude information and the moon ephemerisare utilized to obtain the probe initial position relative to earth, and the Levenberg-Marquardt algorithm is usedto determine the accurate probe position relative to earth, and the probe orbit relative to earth is estimated by u-sing the extended Kalman filter. The autonomous optical navigation algorithm is validated using the digital simu-lation.

关键词： autonomous optical navigation interplanetary exploration Levenberg-Marquardt algorithm

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Fast sar image matching algorithm in naviglation system

Fast sar image matching algorithm in naviglation system

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IEEE Conference on Aerospace

作者： Yang Li Yuan Xin Wang ShuHua Institute of Image Processing and Pattern Recognition Shanghai JiaoTong University Shanghai P. R. China Navigation Center Nanjing University of Aeronautics and Astronautics Nanjing P. R. China

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FVC2002: Second fingerprint verification competition

FVC2002: Second fingerprint verification competition

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作者： Maio, D. Maltoni, D. Cappelli, R. Wayman, J.L. Jain, A.K. Biometric System Lab. DEIS University of Bologna via Sacchi 3 47023 Cessna Italy Biometric Test Center College of Engineering San Jose State University San Jose CA 95192 United States Pattern Recognition and Image Processing Laboratory Michigan State University East Lansing MI 48824 United States

Two years after the first edition, a new Fingerprint Verification Competition (FVC2002) was organized by the authors, with the aim of determining the state-of-the-art in this challenging pattern recognition application. The experience and the feedback received from FVC2000 allowed the authors to improve the organization of FVC2002 and to capture the attention of a significantly higher number of academic and commercial organizations (33 algorithms were submitted). This paper discusses the FVC2002 database, the test protocol and the main differences between FVC2000 and FVC2002. The algorithm performance evaluation will be presented at the 16th ICPR. © 2002 IEEE.

关键词： pattern recognition

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