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A detection method of moving ships by image processing as a support system of AIS

A detection method of moving ships by image processing as a ...

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institute of Navigation, 2005 National Technical Meeting, NTM 2005

作者： Shimpo, M. Hirasawa, M. Nakajima, A. Shoji, R. Oshima, M. Tokyo University of Marine Science and Technology Information Systems Planning and Development Department Mitsubishi Electric Corporation Japan Institute of Navigation Robotics Society of Japan Institute of Electronics Information and Communication Engineers Japan Institute of Navigation Image Processing Radar Network System Faculty of Marine Technology Tokyo University of Marine Science and Technology Electro Technical Laboratory Ibaraki Japan Tokyo University of Mercantile Marine Tokyo Japan Institute of Electronics Information and Communication Engineers Information Processing Society of Japan Japanese Society for Artificial Intelligence Marine Engineering Society in Japan Law and Computers Association of Japan

This paper proposes a detection method of moving ships from the navigational image sequence that was taken with cameras installed on the bridge of the ship. The image is influenced by roll and pitch of the ship. Therefore, usual technique of image processing cannot be used such as Finite Difference method. Moreover, as many sea waves appear in the images, the image cannot be dealt without rejecting sea waves. The technique in this paper proposes how to get rid of the influence of roll, pitch and sea waves. After that, we detect the ships. An interval between each of the frames is one-thirty second in this experiment. The size of the images is 640 pixels in width and 480 pixels in height. At first, the frames are segmented into about 5000 regions using brightness value of the image. About 100 regions were estimated with the ship. Each region was matched with another two frames, which passed 0.33 second and 0.66 second. 0.33 second corresponds to 10 frames. The movement of the ship is less than 50 pixels in this interval. The SSDA method is used for matching processing to be more efficiently. Both the coordinate points of an original region and the matched one are recorded on the table. It is used to calculate the deflection, the speed and the direction of the moving vector of each region. The ships can be detected with these parameters. The detected ships can be displayed clearly as a result of processing. We have taken a lot of video images in Tokyo Bay and Tokyo Port. It becomes possible to show that the ships can be detected from the video images.

关键词： Navigation systems

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Real-time signal processing system for target tracking based on ADSP21060 and FPGA

Real-time signal processing system for target tracking based...

引用

International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Guangzhou Zhao Tianxu Zhang State Key Laboratory for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan China Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)0780390156

This paper presents a novel real-time signal processing system using for target tracking, it uses both ADSP21060 and FPGA to attain high performance and high-speed image processing. It analyses the flexible hardware architecture based on the idea of reconfigurability and modularization, and discusses three main modules and extensibility of the hardware system. Then the implementation of the image pre-processing and target intelligent tracking algorithm is discussed in detail. The experimental result shows that the system processing rate reaches 30 frames per second. The system can automatically detect targets and output the tracking information in real-time.

关键词： Real time systems signal processing Target tracking Field programmable gate arrays Digital signal processing Hardware Logic arrays signal processing algorithms image processing image analysis

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The PSD analysis of UWB time hopping impulse radio multi-user aggregate signals

The PSD analysis of UWB time hopping impulse radio multi-use...

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International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Guangrong Yue Shaoqian Li Lijia Ge National Key Laboratory of Communication University of Electronic Science and Technology Chengdu Sichuan China Chongqing Sinotel Digital Communications and Signal Processing Institute China

ISBN: (纸本)0780390156

This paper studies the power spectrum density (PSD) of ultra wideband (UWB) time hopping (TH) multi-user aggregate signals with asynchronous transmission and with synchronous transmission. TH codes under consideration are deterministic period code and random integer code. Two UWB modulations, TH pulse position modulation (PPM) and TH pulse amplitude modulation (PAM), are considered in this paper. The distribution of the time delay of UWB asynchronous transmission can dominate the PSD of aggregate signals. The main system parameters, which determine the PSD of UWB aggregate signals, are investigated in detail.

关键词： signal analysis Aggregates Amplitude modulation Pulse modulation Ultra wideband technology Bandwidth Digital communication Digital signal processing Wireless communication Spread spectrum communication

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3CCD interpolation using selective projection

3CCD interpolation using selective projection

引用

International Conference on Acoustics, Speech, and signal processing (ICASSP)

作者： Soo Hyun Bae Moon-Cheol Kim Biing-Hwang Juang Center for Signal and Image Processing Georgia Institute of Technology Atlanta GA USA Video Laboratory Digital Media Research & Development Center Samsung Electronics Company Limited Suwon South Korea

ISBN: (纸本)0780388747

The emergence of HDTV accelerates the evolution of high-resolution imaging systems. A 3CCD digital camera system has been developed for higher resolution than one CCD imaging has. From the pixel correlation caused by a half-pixel shift of the green channel, we can interpolate pixels and get four times higher resolution of the color image. The proposed method involves three projection operators. The first is to reduce aliasing of image regions by selective projection in subband channels. The second projection makes an inverse of the MTF which generates blurring over the entire image. The last operator works for fast convergence. From experimental results, the proposed algorithm shows suppression of jagging effects and restoration of aliased image regions. It is experimentally shown that the projection process converges and is almost finished at the first iteration.

关键词： Interpolation High-resolution imaging image resolution Pixel HDTV Acceleration Digital cameras Charge coupled devices Color Convergence

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Background suppression based-on wavelet transformation to detect infrared target

Background suppression based-on wavelet transformation to de...

引用

International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Yu-Qiu Sun Jin-Wen Tian Jian Liu State Education Commission Key Laboratory for Image Processing and Intelligent Control Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China School of Information and Mathematics Yangtze University Jinzhou China State Education Commission Key Laboratory for Image Processing and Intelligent Control Department of Electronic Information and Enginery Huazhong University of Science and Technology Wuhan China

Target detection and location in infrared clutter background is very important to infrared search and track system. Especially for small target detection in infrared image in background of sea and sky, there are no geometric and structure character to use. When targets such as ship and naval vessel sailing at long distance, they always appear around the sea-level line, and it is mixed with cloud and sea-wave clutter. It is difficult to segment and locate precisely. Background suppression based-on wavelet transformation is proposed in the paper. Wavelet decomposition makes it possible to analyze a signal both in time and frequency domains. In the paper infrared sea and key background images are processed. For their SNR is low and background is complex, using wavelet transformation decomposes an original image and extract approximate feature to reconstruct an image, which mainly includes background information. A new image would be obtained using background image subtracted from original image. There are mainly target and noise points left in the new image. By setting proper threshold, the target can be detected perfectly. At last, experiment results are given and show the method is practical.

关键词： Infrared detectors Object detection Infrared imaging Target tracking Marine vehicles Clouds image segmentation Wavelet analysis Wavelet domain signal analysis

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On the congestion and shortcut problems of ant-based routing for mobile ad hoc networks

On the congestion and shortcut problems of ant-based routing...

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International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Renting Liu Wei Guo Xiangquan Zheng Yongchun Tian National Key Laboratory of Communication University of Electronic Science and Technology Chengdu Sichuan China Key Laboratory of Digital Communication & Signal Processing Chongqing Communication College Chongqing China The 30th Institute of Electronic Science Group of China Chengdu China

ISBN: (纸本)0780390156

Mobile ad hoc networks (MANET) are characterized by the unpredictable change in the quality of wireless communication due to node movement and failure. To cope with such a special characteristic, various ant-based routing algorithms have been proposed for MANET. However, these algorithms still have several problems unsolved, including the congestion problem and the shortcut problem. In this paper, we present a new ant-based routing algorithm, called ant-based routing algorithm with admission control and noise encouraged route-selection (ARACNE). The algorithm adopts two mechanisms, called admission control (AC) and noise encouraged route-selection (NE), to solve the congestion problem and the shortcut problem, respectively. Simulation results show that both mechanisms can improve the performance of ant-based routing algorithm for MANET by reducing the routing overhead and increasing the packet delivery rate.

关键词： Routing Mobile ad hoc networks signal processing algorithms Mobile communication Ad hoc networks Admission control Wireless communication Delay estimation Laboratories Digital communication

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Support value based fusing images with different focuses

Support value based fusing images with different focuses

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Sheng Zheng Yu-Qiu Sun Jin-Wen Tian Jian Liu State Education Commission Key Laboratory for Image Processing and Intelligent Control Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China China Three Gorges University Yichang China

Many vision-related processing tasks, including edge detection and image segmentation, can be performed more easily when all objects in the scene are in good focus. However, in practice, this may not be always feasible as optical lenses, especially those with long focal lengths, only have a limited depth of field. One classical approach to recover an everywhere-in-focus image is to use Laplacian pyramid image fusion. First, several source images with different focuses of the same scene are taken and decomposed into the low/high-frequency components image sequences. Within these decompositions, the high-frequency components image sequences with the largest magnitude are selected at each pixel location. Finally, the fused image can be recovered from the decomposed components image sequences. In the support vector machine (SVM), the pixels with larger support values have a physical meaning in the sense that they reveal relative more importance of the data points for contributing to the SVM model. In this paper, we use Laplacian pyramid for the multi resolution decomposition, and then replace the traditional salient features by support values of the mapped least squares (LS)-SVM for fusing image. Experimental results illustrate that the proposed method outperforms the traditional approach.

关键词： Focusing image sequences Support vector machines Layout Laplace equations image edge detection image segmentation Optical sensors Lenses image fusion

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A bi-directional and hop-by-hop pheromone-updated ant-based routing protocol for MANETs

A bi-directional and hop-by-hop pheromone-updated ant-based ...

引用

International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Renting Liu Wei Guo Xiangquan Zheng Yongchun Tian National Key Laboratory of Communication University of Electronic Science and Technology Chengdu Sichuan China Key Laboratory of Digital Communication & Signal Processing Chongqing Communication College Chongqing China Group of China The 30th Institute of Electronic Science Group of China Chengdu China

ISBN: (纸本)0780390156

Inspired by the foraging behaviors of real ants, an ant-based routing algorithm for mobile ad hoc networks (MANET) should adapt the special characteristics of the networks. It should be self-configurable, self-built and distributed. In this paper, we present a bi-directional and hop-by-hop pheromone-updated ant-based routing (BHPAR) algorithm for MANET. The algorithm can accelerate the convergence rate of the existing ant-based routing algorithms and improve the response speed to abnormal cases in MANET. Besides, BHPAR provides redundant paths for routing and thus improves the reliability and survivability of the network. Simulation results show that BHPAR performs well in average end-to-end delay and routing overhead as well as packet delivery rate.

关键词： Bidirectional control Routing protocols Mobile ad hoc networks signal processing algorithms Mobile communication Telecommunication network reliability Heuristic algorithms Broadcasting Laboratories Digital signal processing

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DSA image registration based on multiscale Gabor filters and mutual information

DSA image registration based on multiscale Gabor filters and...

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International Conference on Information and Automation (ICIA)

作者： Zhiguo Cao Xiaoxiao Liu Bo Peng Yiu-Sang Moon Key Laboratory of Ministry of Education for Image Processing and Intelligent Control Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan China Department of Computer Science and Engineering Chinese University of Hong Kong New Territories Hong Kong China

In clinical practice, digital subtraction angiography (DSA) is a powerful technique for the visualization of blood vessels in X-ray image sequences. Different with traditional DSA image registration processes, in our proposed image registration method, the control points are selected from the vessel centerlines using multiscale Gabor filters, and mutual information (MI) is then taken as the similarity criterion to find the correspondences. Experimental results demonstrate our algorithm efficiently yields satisfying registration result for DSA images.

关键词： image registration Gabor filters Mutual information Biomedical imaging Angiography Visualization Displacement control Blood vessels image sequences Pixel

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An improved mapping method of buffer for line-based architecture of 2-D DWT

An improved mapping method of buffer for line-based architec...

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International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Cheng-Yi Xiong Cheng-Jun Wang Jin-wen Tian Jian Liu Institute of Pattern Recognition & Artificial Intelligence Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan China College of Electronic Information Engineering South-Center University for Nationalities Wuhan China

ISBN: (纸本)0780390156

The number of arithmetic units used in the one-dimensional (1D) discrete wavelet transform (DWT) is the main consideration for reducing the area of VLSI implementation of 1D DWT, while the size of intermediate memory used for data buffering is another dominate factor of effecting hardware complexity of VLSI implementation for two-dimensional (2D) DWT. In this paper, we exploit the essential relationship between the size of temporal buffer (TB) required in the line-based architecture for 2D DWT (LBA2DDWT) and the number of registers used in the 1D DWT module, and present an improved method of mapping the registers used in the 1D DWT to the TB required in LBA2DDWT. Comparison results with the other design reported in previous literature demonstrate that, the proposed mapping method can reduce efficiently the size of memory required in LBA2DDWT.

关键词： Discrete wavelet transforms Registers Two dimensional displays Very large scale integration Hardware Convolution Pipeline processing Arithmetic signal analysis image processing

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