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MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on multispectral Image processing and Pattern Recognition

作者： Yao, Wei Wang, Yuehuan Wang, Hai Sang, Nong Inst. for Pattern Recognition and AI Huazhong Univ. of Sci. and Tech. Wuhan 430074 China State Key Lab. of Multi-spectral Information Processing Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

A method of feature validity analysis is proposed in this research. More than 100 kinds of features which are commonly used in the remote sensing image analysis have been selected. In this process, we choose level set and Otsu segmentation methods to extract the target and use manually segmented target images as templates, based on the method, we can make a evaluation of these features validity especially the stability in multi-resolution. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Image analysis

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Skeleton-based fast path planning for UAV

Skeleton-based fast path planning for UAV

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MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on multispectral Image processing and Pattern Recognition

作者： Liu, Xin Zhou, Chengping Ding, Mingyue Cai, Chao Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China College of Life Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

A new path planning method for UAV in static workspace is presented. The method can find a nearly optimal path in short time which satisfies the UAV kinematic constraints. The method makes use of the skeletons to construct the graph of the planning space considering the configuration of the obstacles and utilizes the graph to find a shortest collision-free path, and a novel technique is utilized to convert the free path into a feasible path. The method can be applied to different applications and easy to be implemented. Experimental results showed that the path planning can be done in a fraction of second on a contemporary workstation (2-3 seconds) under the condition of satisfying the kinematic constraints. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Motion planning

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An 800mW fully-integrated 130nm CMOS DC-DC step-down multi-phase converter, with on-chip spiral inductors and capacitors

An 800mW fully-integrated 130nm CMOS DC-DC step-down multi-p...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Michael Wens Michiel Steyaert State Key Lab. of Multi-spectral Information Processing Technology Huazhong Univ. of Sci. & Tech Wuhan

ISBN: (纸本)9781424428922

A fully-integrated DC-DC step-down four-phase converter in a 130 nm 1.2 V CMOS technology is realized. Integrated metal-track inductors and integrated MOS and MIM capacitors are used for the output filter. No external components are required. The converter is designed to generate an output voltage of 1.2 V out of a 2.6 V supply voltage. Stacked transistors are used to cope with the high voltage. The maximum power conversion efficiency is 58 %, for a voltage conversion ratio of 0.46. This yields a 21 % efficiency enhancement factor over a linear regulator. The maximum output power of 800 mW is the highest ever reported for a fully-integrated DC-DC converter, by the authors knowledge. A novel control system, based on a semi-constant on/off-time keeps the output voltage constant at varying load and line conditions. Moreover it ensures stability over the entire load range from 0 mW to 800 mW.

关键词： DC-DC power converters Spirals Inductors Voltage MIM capacitors CMOS technology MOS capacitors Filters Power conversion Regulators

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Path planning using FMM with direction and curvature constrained

Path planning using FMM with direction and curvature constra...

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MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on multispectral Image processing and Pattern Recognition

作者： Li, Shidong Ding, Mingyue Cai, Chao Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China Hubei University for Nationalities Enshi Hubei 445000 China College of Life Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

It is difficult to meet both direction and curvature constraints for traditional Fast Marching (FM) method in path planning. Based on adjusting the cost function in Eiknoal equation-the control equation for FM, a new model for computing the integrated cost function was presented in this paper. A relationship formula about curvature radius was obtained and three kinds of adjusting strategies were given;two of them were used to modify the route to meet with the requires of turning constraint in this paper. Experiments showed that the improved model can be used to plan the path with FMM for agent such as unmanned aerial vehicle (UAV) or robot, which is limited to pass through the scene matching areas. And our preliminary experiments demonstrated that the strategies are feasible and efficient to obtain path with certain curvature radius. The model can also be used to represent the problem such as an aircraft flying in a flow field. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Motion planning

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A novel path planning method based on path network

A novel path planning method based on path network

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MIPPR 2009 - Medical Imaging, Parallel processing of Images, and Optimization Techniques: 6th International Symposium on multispectral Image processing and Pattern Recognition

ISBN: (纸本)9780819478085

Traditional path planning methods are too slow to meet the real-time requirement in practical applications. In order to solve this problem, an idea of path net was proposed in this paper. The path planning procedure is divided into two steps: network segment planning and segment assembling. The first step was done with Fast Marching Method, including port selection of segment and network segment planning. Second step, the A* searching method was chosen to select segments for assembling. Experiments demonstrated that our method can obtain an optimal route in a few of seconds after the start and goal are given while several minutes are needed for traditional methods. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Motion planning

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A New Circle Targets Extraction Algorithm

A New Circle Targets Extraction Algorithm

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The First International Conference on multimedia information Networking and Security(第一届国际多媒体网络信息安全会议 MINES 2009)

作者： Chen Zhong Deng He Wang Guoyou Intelligence Control Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Multi-Spectral Information Processing State Key Laboratory Wuhan P.R.China

According to the drawback of the traditional circle target extraction algorithm used by Hough Transform, such as computation complexity, low efficiency and etc, an new circle target extraction algorithm is proposed in this paper which can extract multiple circle targets with different radius at one time. First, the Average Absolute Difference is implemented to enhance the edge of the circle targets and suppress the noise of the background; Second, the locally self-adaptive segmentation algorithm is implemented to obtain the binary image. Thirdly, the thinning algorithm is implanted to obtain the single pixel edge of the circle targets and in order to reduce the computation times in the following process, a pruning algorithm is necessary; finally, a modified Hough transform algorithm is proposed to obtain the circle targets. The new circle targets have three advantages: low time consuming, high detection rate, robust to noise and fragmentary boundaries. The experimental results demonstrate that the new algorithm can extract the multiple circle targets quickly and accurately.

关键词： circle extraction hough transformation Average Absolute Difference thinning

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New design for 9/7-tap wavelet filter and its VLSI implementation

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Jisuanji Xuebao/Chinese Journal of Computers 2008年第3期31卷 411-418页

作者： Tian, Xin Tan, Yi-Hua Tian, Jin-Wen State Key Laboratory for Multi-Spectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Wuhan 430074 China

This paper designs a new kind of lifting 9-7-tap wavelet filter with binary characteristics and presents a high speed VLSI structure for the wavelet filter. The coefficients of the lifting filters are binary numbers, so it can simplify the VLSI design. The test results for compression performances have shown that the new filter is good almost as CDF97 under PSNR. when the data has a finite accuracy, it may have a better performance than CDF97. The filter can be implemented with using adders and shifters. Therefore the hardware resources can be saved and the critical path can be shortened. According to using the folding technology and the retiming technology, the architecture of the design can be transformed into a kind of embedded folding architecture which leads to the parallel computation of addition operations. So the critical path can be shortened to nearly the time of a addition operation and the utilization of the hardware resources also has a good performance. Simulation results show that the max working frequency could almost reach 250 MHz which is the four times by the CDF97;The occupied logic cell is reduced by 66.7 compared with the CDF97+4 stages pipeline. So it is especially suitable for the high speed VLSI design.

关键词： VLSI circuits

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GEMI: A high performance and high flexibility memory interface architecture for complex embedded SOC

GEMI: A high performance and high flexibility memory interfa...

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International Conference on Computer Science and Software Engineering, CSSE 2008

作者： Hualong, Zhao Hongshi, Sang Tianxu, Zhang Yebin, Fan State Key Lab. for Multi-spectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China Department of Computer Science Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9780769533360

Two of the most significant factors in the success of today's system-on-chip (SoC) designs are the ability to deliver efficient access to off-chip high speed memory and the ability to be compatible with several different interface-timings of several different sorts of memories. And the scheduling scheme of data streams for multi-master and multi-outstanding requests situation in complex SoC should be considered carefully, too. This paper introduces a novel general external memory interface (GEMI) architecture for the high performance and high flexibility memory interface. Several techniques and methods, i.e. data and command buffers based on asynchronous FIFO, optimized bank management, multi-port access scheduler, request reorder unit, are proposed in this paper for fulfilling the requirements mentioned above. Some techniques are specially proposed for data streams scheduling in complex SoC. At the end of the paper, the simulation and tape-out results are provided. The whole implementation of architecture is proven to be not only functional and efficient, but also flexible and reusable by simulation and silicon verification. © 2008 IEEE.

关键词： Scheduling

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An Algorithm for Object Function Optimization in Mutual information-Based Image Registration

An Algorithm for Object Function Optimization in Mutual Info...

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Congress on Image and Signal processing, CISP

作者： Zhiguo Cao Yi Zheng Yong Wang RuiCheng Yan State key Laboratory for Multi-spectral Information Processing Technology Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China

Image registration is widely used in remote sensing image processing, medical image analysis and many other fields. Mutual information-based image registration technique gained much attention recently. However, during the optimization procedure, because of the influence of interpolation and the changes of overlapping areas in the images, the object function of the mutual information method may converge at local maximums so that wrong transformation parameters are generated as a result. In this paper, an improved simulated annealing–simplex method is proposed to solve this problem. Experiment results show that registration precision can reach to the sub-pixel level.

关键词： Image registration Remote sensing Image processing Biomedical imaging Image analysis Optimization methods Interpolation Mutual information Image converters Simulated annealing

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RDA for automatic airport recognition on FLIR image

RDA for automatic airport recognition on FLIR image

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World Congress on Intelligent Control and Automation (WCICA)

作者： Wei Liu Jinwen Tian Xinwu Chen State Key Laboratory for Multi-Spectral Information Processing Technology Huazhong University of Science and Technology Wuhan Hubei China Xinyang Normal University Xinyang China

This paper studies Regularized Discriminant Analysis (RDA) in the context of automatic airport recognition system for Forward-Looking infrared images (FLIR). When the within class covariance of training sample are sometimes singular, Linear and Quadratic discriminant analysis (LDA & QDA) does not necessarily give the best performance. Alternatives to the usual plug-in (maximum likelihood) estimates for the covariance matrices are proposed, which is called two-parameter RDA in this paper. Here, we check two-parameter RDA availability and compare its performance in our recognition system to other classifiers, such as KNN, LDA, QDA etc. The experimental results demonstrate the efficacy of the two parameters RDA classifier for automatic airport recognition in FLIR images. On the basis of RDA classifier, our proposed recognition system frame was concluded to be a highly prospective candidate for real time ATR system on airport and can also be used on other ATR system, such as building, power plant etc.

关键词： Airports Classification algorithms Training Image recognition Covariance matrix Algorithm design and analysis Feature extraction

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