2015
2015
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Record 1 of
Title:A GPU-based implementation of PKF for INS/CNS integrated Navigation System
Author(s):Bai, Zhaofeng(1); Qiu, Yuehong(1)Source: 2015 IEEE 6th International Symposium on Microwave, Antenna, Propagation, and EMC Technologies, MAPE 2015 Volume: Issue: DOI: 10.1109/MAPE.2015.7510423 Published: July 12, 2016Abstract:By using navigation system, carrier arrives at a predetermined position follow the route within the stipulated time. INS (Inertial Navigation System) has disadvantage of navigation error accumulate with time. CNS (Celestial Navigation System)'s has a low data update but the navigation error does not accumulate with time. Our goal is to develop a high-precision and high-performance navigation system by using integrated navigation method and Parallel Kalman Filter (PKF). As GPU (graphic processor units) have shown to provide much speedup in matrix computing which can be used on the filter algorithm of integrated navigation system, we will explore in this work for system performance optimization. Experiments results demonstrated that proposed solutions by using GPU accelerated Kalman filter has a scalable speedup as the measurement dimension increases than a pure CPU counterpart. ? 2015 IEEE.Accession Number: 20163302713081 -
Record 2 of
Title:A maximum projection and particle filtering algorithm for space debris detection
Author(s):Xi, Jiangbo(1,2); Wen, Desheng(1); Song, Zongxi(1); Gao, Wei(1); Kang, Menghua(1,2); Mou, Jiao(1,2); Pang, Peng(1,2); Lu, Hao(1,2)Source: Journal of Information and Computational Science Volume: 12 Issue: 1 DOI: 10.12733/jics20105176 Published: January 1, 2015Abstract:An algorithm was proposed to detect the space debris in the optical astronomical images. Maximum Projection was induced to reduce the data amount in the three dimensional space. When the space debris was detected, it was tracked by the particle filter thus the precise location information can be got at any time. The simulation results show that the method can perfectly meet the requirement of the space debris detection with a high accuracy (RMS error less than 1 pixel) and detection probability, and a low false alarm rejection.Accession Number: 20150300435847 -
Record 3 of
Title:Rapid star extraction and high accuracy location in star image
Author(s):Xi, Jiangbo(1,2); Wen, Desheng(1); Song, Zongxi(1); Gao, Wei(1); Yao, Dalei(1,2); Yang, Shaodong(1)Source: Journal of Information and Computational Science Volume: 12 Issue: 8 DOI: 10.12733/jics20105913 Published: May 20, 2015Abstract:The pre-processing method of star image, star extracting and high accuracy star location method are studied to improve the accuracy of star location and reduce the amount of calculation during processing. The background and noise of CCD (Charge Coupled Device) image are analyzed, and pre-processing is performed: correct the light and dead point, estimate and remove the background and the phenomenon of non-uniformity with local mean iteration method. The improved cross projection method is proposed to extract the stars in the image and the calculation amount is reduced because the scanning and marking process is not needed compared with the traditional connected domain method. And the stretching of the star extracting range in horizontal or vertical direction is solved. The star location method with phase transfer function is proposed using the phase shift property of Fourier Transform. Experiment results show that the accuracy of our method is 0.0022 pixels (without noise), which is much higher than the traditional Calculation Method (COM) and our method can immune the noise very well. The experiment is also performed to the simulated star image and the results show that all stars in the image can be located precisely with our methods. Copyright ? 2015 Binary Information Press.Accession Number: 20152400928088 -
Record 4 of
Title:A Survey of Sparse Representation: Algorithms and Applications
Author(s):Zhang, Zheng(1,2); Xu, Yong(1,2); Yang, Jian(3); Li, Xuelong(4); Zhang, David(5)Source: IEEE Access Volume: 3 Issue: DOI: 10.1109/ACCESS.2015.2430359 Published: 2015Abstract:Sparse representation has attracted much attention from researchers in fields of signal processing, image processing, computer vision, and pattern recognition. Sparse representation also has a good reputation in both theoretical research and practical applications. Many different algorithms have been proposed for sparse representation. The main purpose of this paper is to provide a comprehensive study and an updated review on sparse representation and to supply guidance for researchers. The taxonomy of sparse representation methods can be studied from various viewpoints. For example, in terms of different norm minimizations used in sparsity constraints, the methods can be roughly categorized into five groups: 1) sparse representation with $l-{0}$ -norm minimization; 2) sparse representation with $l-{p}$ -norm ( $0 ? 2013 IEEE.Accession Number: 20152200898402 -
Record 5 of
Title:Graded index porous optical fibers - Dispersion management in terahertz range
Author(s):Ma, Tian(1,2); Markov, Andrey(1); Wang, Lili(2); Skorobogatiy, Maksim(1)Source: Conference on Lasers and Electro-Optics Europe - Technical Digest Volume: 2015-August Issue: DOI: Published: August 10, 2015Abstract:Graded index porous fiber incorporating an air-hole array featuring variable air-hole diameters and inter-hole separations is proposed. We experimentally demonstrate smaller pulse distortion, larger bandwidth and higher excitation efficiency compared to fibers with uniform porosity. ? 2015 OSA.Accession Number: 20160301805041 -
Record 6 of
Title:A non-uniformity correction algorithm based on single infrared image
Author(s):Wang, Jihong(1,2); Zhou, Zuofeng(1); Leng, Hanbing(1); Wu, Qingquan(1,2)Source: Journal of Information and Computational Science Volume: 12 Issue: 1 DOI: 10.12733/jics20105118 Published: January 1, 2015Abstract:To overcome the shortcoming that most of the recent Non-uniformity Correction (NUC) algorithms which need a large number of underlying images, a non-uniformity correction method based on single infrared image is proposed. In the proposed method, the moment matching algorithm is used to correct the non-uniformity image to get the pilot image. Then, the banding occurring in the pilot image is removed by the local weighted-histogram specification algorithm to get the final result. Experiment results show the effectiveness of the proposed non-uniformity correction algorithm.Accession Number: 20150300435841 -
Record 7 of
Title:A nonlinear anisotropic GVF-shock diffusion method to multi-frame image super-resolution reconstruction
Author(s):Zhao, Xiaodong(1,2); Cao, Jianzhong(1); Zhou, Zuofeng(1); Leng, Hanbing(1); Guo, Huinan(1)Source: Journal of Information and Computational Science Volume: 12 Issue: 8 DOI: 10.12733/jics20105980 Published: May 20, 2015Abstract:This paper presents a new nonlinear anisotropic Gradient Vector Flow (GVF) shock diffusion method to multi-frame image Super-resolution (SR) reconstruction. Firstly, matrix-valued diffusion tensor is constructed based on anisotropic nonlinear structure tensor, making full use of its directional smooth characteristics. Then, an anisotropic GVF is proposed to diffuse along tangent and normal directions separately, combing with adaptively weighted shock filter to enhance edge sharpness. Experimental results show that proposed algorithm enhances image edges and suppresses noise effectively. Copyright ? 2015 Binary Information Press.Accession Number: 20152400928109 -
Record 8 of
Title:A CMOS high speed imaging system design based on FPGA
Author(s):Tang, Hong(1,2); Wang, Huawei(1); Cao, Jianzhong(1); Qiao, Mingrui(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 9675 Issue: DOI: 10.1117/12.2199529 Published: 2015Abstract:CMOS sensors have more advantages than traditional CCD sensors. The imaging system based on CMOS has become a hot spot in research and development. In order to achieve the real-time data acquisition and high-speed transmission, we design a high-speed CMOS imaging system on account of FPGA. The core control chip of this system is XC6SL75T and we take advantages of CameraLink interface and AM41V4 CMOS image sensors to transmit and acquire image data. AM41V4 is a 4 Megapixel High speed 500 frames per second CMOS image sensor with global shutter and 4/3" optical format. The sensor uses column parallel A/D converters to digitize the images. The CameraLink interface adopts DS90CR287 and it can convert 28 bits of LVCMOS/LVTTL data into four LVDS data stream. The reflected light of objects is photographed by the CMOS detectors. CMOS sensors convert the light to electronic signals and then send them to FPGA. FPGA processes data it received and transmits them to upper computer which has acquisition cards through CameraLink interface configured as full models. Then PC will store, visualize and process images later. The structure and principle of the system are both explained in this paper and this paper introduces the hardware and software design of the system. FPGA introduces the driven clock of CMOS. The data in CMOS is converted to LVDS signals and then transmitted to the data acquisition cards. After simulation, the paper presents a row transfer timing sequence of CMOS. The system realized real-time image acquisition and external controls. ? 2015 SPIE.Accession Number: 20161602266869 -
Record 9 of
Title:A simple pose estimation method based on co-planar feature points
Author(s):Xu, Weigao(1,2); Zhou, Zuofeng(1); Cao, Jianzhong(1); Zhao, Bing(1,2)Source: Proceedings - 2015 International Conference on Control, Automation and Robotics, ICCAR 2015 Volume: Issue: DOI: 10.1109/ICCAR.2015.7166017 Published: July 23, 2015Abstract:This paper presents a simple method to solve the P4P problem based on co-planar feature points. By enhancing the geometric constraints of the feature points which attached to the target previously, we obtain the three-dimensional camera coordinates of the feature points in two different formulas. Then the translation vector and three rotation angles describing the relationship between target coordinate system and camera coordinate system are computed using a closed-form solution directly. In order to improve the precision about the extraction of the image center coordinate of the feature point, we use the morphology expansion operation to achieve it. The experimental results and theoretical analysis which were compared with the previous method demonstrate that our method is more fast and effective. ? 2015 IEEE.Accession Number: 20162202443189 -
Record 10 of
Title:The design of nanosecond high-voltage ultra wide band bipolar pulse generator
Author(s):Shi, Jincheng(1,2); Liu, Baiyu(1); Gou, Yongsheng(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 9674 Issue: DOI: 10.1117/12.2199899 Published: 2015Abstract:The design of nanosecond high-voltage ultra wide band bipolar pulse generator is shown in this paper. By analyzing the principle of the avalanche diode and doing the research of the related circuit acting on the pulse, this generator can generate a nanosecond high-voltage ultra wide band bipolar pulse, which its peak-to-peak voltage is about 400V and the pulse time width is 2ns. The experimental results showed a good agreement with the simulation results. A negative unipolar high-voltage pulse, having a fast falling-edge and a slowly exponential rising-edge, was firstly generated by the MARX circuit consist of the avalanche diodes. Then the use of the high speed avalanche diode could generate a negative unipolar high-voltage narrow Gaussian pulse, having a fast falling-edge and a fast rising-edge. In an attempt to cancel the reflection of the pulse made by the impedance mismatch, the circuit introduced the capacitor(C) and inductor(L) by calculating. Eventually a nanosecond high-voltage ultra wide band bipolar pulse could be got after going through the differentiator consist of introducing the right resistance, capacitance and inductance by calculation and experiment, and a filter with 2GHz bandwidth makes the bipolar smooth and perfect. ? 2015 SPIE.Accession Number: 20155201719010 -
Record 11 of
Title:Texture feature extraction of hyper-spectral image with three-dimensional gray-level co-occurrence
Author(s):Wang, Shuang(1,2); Hu, Bingliang(1); Wang, Feng(1,3)Source: Journal of Information and Computational Science Volume: 12 Issue: 4 DOI: 10.12733/jics20105472 Published: March 1, 2015Abstract:To extract useful information of hyper-spectral images effectively, a kind of texture feature extraction method using three-dimensional Gray-level Co-occurrence Matrix (3D GLCM) is proposed in this paper. The method extracts the texture features of hyper-spectral image as a pseudo data cube that combines the two-dimensional space data with one-dimensional spectrum data, instead of each band computed alone. Moreover, the parameters related to building the 3D GLCM are all optimized. To obtain the features both in spectral space and spatial space, the moving directions of texture window are extended to the spectral space, namely that four directions in two-dimensional (2D) image space are expanded to thirteen ones in three-dimensional (3D) space. Then, the Jeffreys-matusita (JM) distance based on the class separable criterion is employed to select the most suitable window size for each object. Finally, the multi-scale texture features are used for classification. The experiments also show that, compared with the traditional methods, the feature extraction method is more effective in describing objects and has better classification accuracy. ?, 2015, Binary Information PressAccession Number: 20151300678620 -
Record 12 of
Title:Preparation andproperty of HKT800 carbon fiber/AG80 epoxy resin composite
Author(s):Gu, Hongxing(1,2); Wang, Haojing(1); Fan, Lidong(1); Zhang, Shubin(1); Pang, Peidong(1)Source: Gongneng Cailiao/Journal of Functional Materials Volume: 46 Issue: 15 DOI: 10.3969/j.issn.1001-9731.2015.15.002 Published: August 15, 2015Abstract:The surface topography, elements, functional groups of HKT800 carbon fiber were characterized, the recipe of AG80 epoxy resin was optimized, then the mechanical and interface performance of HKT800 carbon fiber/AG80 epoxy resin composite were analyzed. The results showed that: the ratio of O/C and N/C in surface elements reached 25.2% and 4.5%, the ratio of active carbon atoms was 0.91, so the surface activity of HKT800 carbon fiber was higher. The epoxy resin could be cured at 150 when the mass ratio of AG80, DDS, BF3·MEA was 100:30:3. The tensile, flexural and compression strength of HKT800 carbon fiber/AG80 epoxy resin composite were 2 682, 1 874 and 1 639 MPa, interlayer shear strength was 110 MPa. ?, 2015, Journal of Functional Materials. All right reserved.Accession Number: 20154501522426