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International Symposium on Intelligence information processing and Trusted Computing

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

ISBN: (纸本)9780769541969

Roadmap methods were widely used in route planning fields, both for robots and unmanned aircrafts. Traditional roadmap is constituted by connecting the vertexes of convex obstacle, which is related to the locations of start and goal of route, so the roadmap can not be reused when anyone of start and goal changed. Absence of reusability reduces the efficiency of route planning by using roadmap. A new roadmap constitution method was proposed in this paper, which is build on dividing the 2D configuration space into multi-scale grids and setting nodes of roadmap on grid boundary using Level-Set method, same method was used to construct the map cells of roadmap between any two nodes lays on same grid . The roadmap constituted with new method can be reused when the start or goal was changed;it is efficient for replanning problem. © 2010 IEEE.

关键词： Reusability

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Sub-manifold distance based object recognition in clutter

Sub-manifold distance based object recognition in clutter

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International Conference on Natural Computation

作者： Zhou, Hua Cai, Chao Ding, Mingyue National Lab for Multi-spectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 China Imaging Processing and Intelligence Control Key Laboratory of Education Ministry School of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781424459612

Object recognition is challenging problem in computer vision due to appearance variation and presence of visual clutter and occlusions. Recently manifolds are thought to be fundamental for visual perception, and manifold learning algorithms are developed for discovering intrinsical features. Selective visual attention mechanism provides tools to reduce computation cost and avoid the influence of clutter background. In this paper, we described a new object recognition method, the submanifold distance (SMD) algorithm, which is induced by the visual attention mechanism to provide complex object recognition. Experiments with airport remote sensing images illustrated that our proposed algorithm can recognize complex objects accurately, robustly and quickly. ©2010 IEEE.

关键词： Object recognition

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Adaptive federated Kalman filtering attitude estimation algorithm for double-FOV star sensor

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Journal of Computational information Systems 2010年第10期6卷 3201-3208页

作者： Zhang, Hua Sang, Hongshi Shen, Xubang National Key Lab. of Science and Technology on Multispectral Information Processing Technologies Institute of PRAI Huazhong Univ. of Sci. and Technol. Wuhan 430074 China Xi'an Microelectronics Technology Institute Xi'an 710054 China

To get high precise attitude in high dynamic spacecraft, an adaptive federated Kalman filtering attitude estimation algorithm is proposed for a double-FOV(field of view) star sensor. To guarantee the robustness and fault-tolerance, the measurement error covariance is computed and updated in the federated filtering process. And the information sharing factors are determined adaptively based on the measurement error covariance. The simulation results show that the algorithm can yield high-accuracy attitudes in various situations. It is suitable to be used for high precise attitude determination while the spacecraft is in high dynamic maneuver stage. © 2010 Binary information Press October, 2010.

关键词： Kalman filters

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Partner selection strategy in cooperative diversity systems

Partner selection strategy in cooperative diversity systems

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Guomin, Li Guisheng, Liao National Key Lab. for Radar Signal Processing Xidian Univ. Xi'an Shaanxi 710071 China School of Communication and Information Engineering Xi'an University of Science and Technology Xi'an Shaanxi 710054 China

ISBN: (纸本)9781424437092

In this paper, a novel strategy for partner selection in cooperative communication system is proposed. The system model is constructed based on the user distribution in the circular area. And then the performance of the present selection method is investigated under the constraint of cooperative gain. The simulation results show that the frame error rate of the method is superior to the random selection in the cooperative area. © 2010 IEEE.

关键词： Cooperative communication

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Brightness temperature of the global moon: Comparison between theoretical simulation and observation by Chang'E-1 lunar orbiter

Brightness temperature of the global moon: Comparison betwee...

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2010 International Conference on Microwave and Millimeter Wave technology, ICMMT 2010

作者： Hu, Guo-Ping Li, Qing-Xia Zheng, Yong-Chun Li, Xiong-Yao Lang, Liang Shen, Guang-Yao Liao, Yi Huang, Quan-Liang Chen, Ping Gui, Liang-Qi Guo, Wei National Key Lab on Multi-spectral Information processing Technologies Huazhong University of Science and Technology Wuhan 430074 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

ISBN: (纸本)9781424457052

To help further processing the data from Chang'E-1 lunar orbiter (CE-1), an initial comparison is made between simulated brightness temperature (TB) of lunar surface and TB observed by microwave radiometer on CE-1. First, a simulation model is presented and simulated TB is given for global moon. Then, global observed TB map is established based on the observed TB from CE-1. Further, the difference between simulated TB and observed TB is given. It is seen the differences are smaller at the nearside of the moon than those at the farside, smaller at low-latitude areas than those at the high-latitude areas, smaller at mare regions than those at highland regions, especially at the Oceanus Procellarum. Differences at most nearside low-latitude areas are within 10 K, but at farside low-latitude areas the differences can reach up to 40 K. © 2010 IEEE.

关键词： Moon

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Online RFC-PRM method for infrared target tracking

Online RFC-PRM method for infrared target tracking

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MIPPR 2009 - Automatic Target Recognition and Image Analysis: 6th International Symposium on multispectral Image processing and Pattern Recognition

作者： Zhou, Xiao Hu, Ruolan Xu, Yaming Zhang, Guilin State Key Lab. for Multispectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology WuHan 430074 China

ISBN: (纸本)9780819478061

A novel online tracking method is proposed based on the response of feature combination (RFC) and relative position map (RPM). First, large numbers of features around the target are achieved after some designed filtering, then a suboptimal feature combination obtained by a given feature selection criteria can be used for next frame. The distinction between the target and background is maximized in the result image. Based on this distinction the target can be segmented out easily. While around the target there always exists some similar regions and will be residue left after filtering. To depress these clutters, the position relationship of local maximal response points cased by the similar regions is recorded as RPM and compared to the last frame. At last, the new feature combination is updated based on the new background around the target. The experiment using small infrared target sequence with different background texture conditions demonstrates the robustness of the new method. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Target tracking

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Parameter estimation of rotational motion blur based on sinc function

Parameter estimation of rotational motion blur based on sinc...

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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： Xu, Yaming Lu, Peng Zhou, Xiao Zhang, Guilin State Key Lab. for Multispectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

A novel approach is proposed to estimate the parameters of rotational motion blur. Firstly, the rotational blur was changed into translational motion blur by geometric transformation from Cartesian coordinate system to polar coordinate system. The characteristic of the translational motion blurred image in frequency domain was concluded. Then, the characteristic was further analyzed by a new definition of point spread function (PSF). Based on this, an object function was derived to describe the relationship between the parameter and the characteristic. At last, the statistical optimal parameter of the blur motion was obtained by traversing through the resolution space of the object function. The comparing experiment results demonstrate that the new method has better accuracy than traditional ones. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Image reconstruction

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Gaussian kernel-based variable-grid image super-resolution reconstruction

Gaussian kernel-based variable-grid image super-resolution r...

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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： Zhou, Cheng Tan, Yi-Hua Tian, Jin-Wen Ma, Wen-Po National Lab. for Multispectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China Beijing Institute of Space Mechanics and Electricity Beijing 100000 China

ISBN: (纸本)9780819478092

A new method for super-resolution reconstruction based on the Gaussian-kernel is presented. Each pixel is modeled as a Gaussian distribution to reconstruct, which is iterated by the image weighting parameter adaptively. The parallelism of this real-valued algorithm based on the grid model enables better integration of the information of the low-resolution images of the same scene. Compared to the bi-cubic interpolation algorithm, experiments show that the proposed algorithm can achieve a gain up over 1.0dB. The visual quality of presented algorithm demonstrate the recovery of spatial frequencies above the band-limit and corresponding reduction in ringing artifacts when compared with the bicubic interpolation algorithm. And the proposed method gets better objective and subjective quality by preserving the sharpness of the edges. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Interpolation

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Gravity gradient-terrain aided navigation based on particle filter

Gravity gradient-terrain aided navigation based on particle ...

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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： Xiong, Ling Ma, Jie Tian, Jin-Wen State Key Lab. for Multi-spectral Information Processing Technologies Key Lab. of Education Ministry for Image Processing and Intelligence Control Huazhong University of Science and Technology Wuhan 430074 China College of Information Science and Engineering Wuhan University of Science and Technology Wuhan 430081 China

ISBN: (纸本)9780819478092

Based on Particle Filter, Gravity Gradient-Terrain aided position technology is proposed in this paper. With the sensitivity of gravity gradient to terrain, the gravity gradient reference map can be computed from the local terrain elevation data. The position can be actualized through matching the real-time measured gravity gradient data to the prepared gravity gradient reference map. The most widely used approximate filtering method is the extended Kaman filter (EKF). EKF is computationally simple but, the convergence of the state estimation for the position is not guaranteed. Particle filter (PF) makes use of the non-linear state and measurement functions, no linearization technology is needed. PF can assure the convergence of the state estimation which follows from the classical results on convergence of Bayesian estimators. Simulations have been done and Particle filter has been shown to be a superior alternative to the EKF in the gravity gradient-terrain matching navigation systems. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Extended Kalman filters

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A novel method for evaluating the validity of the visual attended regions based on SIFT descriptors

A novel method for evaluating the validity of the visual att...

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MIPPR 2009 - Pattern Recognition and Computer Vision: 6th International Symposium on multispectral Image processing and Pattern Recognition

作者： Xiao, Jie Ding, Mingyue Cai, Chao Zhou, Chengping Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478078

Selective visual attention can direct our gaze rapidly towards objects of interest in the view. Better coverage of target region for attention can better serve for recognition. A novel method for evaluating how well the attended regions contribute to the recognition of the target based on SIFT descriptors is proposed in this paper. The method is used to evaluate the attended regions extracted by some visual attention mechanisms on real remote sensor images with different geometric and photometric transformations and for different scene types. The evaluation method proposed in this paper give an explicit, accurate and robust expression about the attended region in visual attention mechanisms and we believe this method could be applicable in visual attention mechanisms in the future work. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Behavioral research

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