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Automatic contour extraction for multiple objects based on Schroedinger transform of image

Automatic contour extraction for multiple objects based on S...

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

作者： Lou, Liantang Lu, Ling Li, Liguo Gao, Wenliang Li, Lingling Fu, Zhongliang School of Remote Sensing and Information Engineering Wuhan University Wuhan 430072 China School of Science Hubei Province Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan 430073 China Department of Computer Science and Application ZhengZhou Institute of Aeronautical Industry Management Zhengzhou 450015 China

ISBN: (纸本)9780819478061

Analytical and numerical solutions of the Schroedinger Equation which was satisfied by the propagator P(b, a) , including all the paths contribution, are discussed. The definition of Schrödinger transform of image is first proposed. Exterior and interior of objects are obtained from Schroedinger transforms of original image and its inverse image. Using the bruteforce algorithm, sets of exterior and interior points are thinned. By finding pairs of exterior and interior points with the smallest distance between them, contours of multiple objects are extracted. Some experiments with simulated and real images are given. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Extraction

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3D visualization technique of human organs

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Journal of Information and Computational Science 2008年第2期5卷 481-488页

作者： Song, Limei Huang, Jinghuan Hu, Liqin Province Key Laboratory of Robot Technique and Application Information Engineering College Southwest University of Science and Technology Mianyang 621010 China

3D visualization of human organs is very important for human analysis. The 3D result is very useful for the surgery analysis, and it can also be used to produce human model by carve machine or 3D printer. There is a lot of method to got 3D data, such as 3D laser scan system, 3D phase measurement, shape from shading, shape from motion, shape from focus, shape from photometric, shape from stereo, etc. Laser scan system is the most commonly used method, but its measurement range relies much on the size of rotation or translation flat. Its measurement precision also relies much on the hardware precision. This paper will introduce a non-orbit, non-contact 3D measurement. The main idea is from shape from stereo technique. It will use two cameras to get the 3D data by the help of lighting system. The two cameras are placed in different view angle. After the high precision calibration system, the 3D absolute stereo coordinate can be got. The proposed 3D imaging method is proved that it is a high precision, low cost, and easy operation stereo matching method. It can be used to the visualization of human face, human head, human tooth, human body, etc. The visualization data can be used in the Face recognition or face surgery, tooth surgery, biologic Computer-aided instruction, human art etc. This method can help the doctor to analyze the surgery before the real surgery starts, thus to decrease the medical accident. The 3D data can also store more vivid information for human art and human memory. The 3D visualization method, the calibration system, the 3D data acquisition system, and the application of 3D visualization data will all be introduced in the paper.

关键词： Calibration

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3D image system based on novel grating matching method

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Journal of Information and Computational Science 2008年第3期5卷 1023-1030页

作者： Song, Limei Lu, Lu Huang, Jinghuan Province Key Laboratory of Robot Technique and Application Information Engineering College South West University of Science and Technology Mianyang 621010 China

There is a lot of non-contact 3D measurement research, such as 3D laser scan system, 3D phase measurement, shape from shading, shape from motion, shape from focus, shape from photometric, shape from stereo, etc. Laser scan system is the most commonly used method, but its measurement range rely much on the size of rotation or translation flat. Its measurement precision also relies much on the hardware precision. This paper focus on non-orbit 3D measurement. The main idea is from shape from stereo technique. Because two cameras are used to get absolute stereo coordinate, so there is a difficult problem in it, that is the stereo matching problem. Pasting flag on the object is the most commonly used method. But because this technique rely much on the image recognizing technique, it can't ensure the 100% matching exactness, thus can't complete high precision 3D surface measurement. In order to improve the precision of 3D measurement, we design a novel grating matching method, which can ensure 100% matching accuracy. On the beginning of the measurement, no gratings projected on the object and the background is captured by CCD camera. Later gratings include single grating and multi gratings will be projected to the object in sequence. All the images include gratings will make a subtraction with the background image. So as to easily and clearly extract the grating information and continue precision matching work in 3D shape reconstruction. From a lot of experiments, the proposed grating matching method is proved that it is a high precision, low cost, and easy operation stereo matching method. And it can be extended to a lot of 3D measurement system.

关键词： CCD cameras

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Navigation of mobile robot using improved artificial potential field method

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Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and technology (Natural Science Edition) 2008年第SUPPL. 1期36卷 177-180页

作者： Liu, Manlu Zhang, Hua Hu, Tianlian Sichuan Province Key Laboratory of Robot Technology and Application Southwest University of Science and Technology Mianyang 621010 China

Using the information of ultrasonic sensors for robot navigation, this paper proposes improved artificial potential field method that simulates the movement of charged particles in uniform electric field. The problems of robot navigation in straight road, arc road and angle road are analyzed. Distance information between robot and the border road is used to control the pose of robot. Then robot could go ahead along the road smoothly and avoid collision with the border road. Algorithm is simulated based on sensors distribution of Pioneer 3 robots. It is proved algorithm could guide robots to select the best or better the path and is feasible and effective.

关键词： Mobile robots

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A Multipurpose Watermarking Scheme for Image Authentication and Copyright Protection

A Multipurpose Watermarking Scheme for Image Authentication ...

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International Symposium on Electronic Commerce and Security

作者： Congxu Zhu Yuping Hu School of Information Science and Engineering Central South University of Forestry and Technology Changsha Hunan China Province Key Laboratory of Electronic Commerce Market Application Technology Guangdong University of Business Studies Guangzhou Guangdong China

ISBN: (纸本)9780769532585

In this paper, we present a novel multipurpose digital image watermarking scheme based on discrete wavelet transform (DWT) and chaotic map, which can be applied to image authentication and copyright protection. In the proposed scheme, by performing 2-level DWT of the host image, the robust watermarks are embedded in the low frequency sub-band LL2 of the host image, and the semi-fragile watermarks, generated by chaotic map, are embedded in the high frequency sub-bands HL2, LH2 or HH2, and the embedding coefficients are selected randomly by secret key. A improved quantization method (IQM) is utilized to embed robust watermarks. Watermarks can be extracted without the original image. Simulation results demonstrate the effectiveness of our algorithm in terms of robustness and fragility.

关键词： Watermarking Robustness Discrete wavelet transforms Pixel Quantization Authentication Copyright protection

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Electronic structure and Fermi surface character of LaNiPO from first principles

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Physical Review B 2008年第21期77卷 214513-214513页

作者： Wei-Bing Zhang Xiao-Bing Xiao Wei-Yang Yu Na Wang Bi-Yu Tang School of Chemistry and Chemical Engineering Guangxi University Nanning 530004 People’s Republic of China Department of Physics and Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education Xiangtan University Hunan Province 411105 People’s Republic of China

Based on first-principles calculation, we have investigated electronic structure of a ZrCuSiAs structured superconductor LaNiPO. The density of states, band structures, and Fermi surfaces have been given in detail. Our results indicate that the bonding of the La–O and Ni–P is strongly covalent whereas binding property between the LaO and NiP blocks is mostly ionic. It is also found that four bands are across the Fermi level and the corresponding Fermi surfaces all have a two-dimensional character. In addition, we also give the band decomposed charge density, which suggests that orbital components of Fermi surfaces are more complicated than cuprate superconductors.

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Design and Implementation of Embedded Multimedia Surveillance System

Design and Implementation of Embedded Multimedia Surveillanc...

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International Workshop on Knowledge Discovery and Data Mining (WKDD)

作者： Yan Liu Ren-Fa Li Cheng Xu Fei Yu School of Computer and Communication Hunan University Changsha China Guangdong Province Key Laboratory of Electronic Commerce Market Application Technology Guangdong University of Business Studies Guangzhou China Provincial Key Laboratory of Image Processing & Image Communication Nanjing University of Posts and Telecommunications Nanjing China

Due to the thrive of networking multimedia, artificial intelligence and embedded system, video surveillance system is evolved from computer-based to embedded-based. This paper presents an intelligent multimedia surveillance system based on embedded video server. Design and implementation issues of this surveillance system are discussed including system architecture, hardware design and software framework. Moreover, practical applications show that our framework can suitable for commercial applications.

关键词： Multimedia systems Artificial intelligence application software Embedded system Video surveillance Computer networks Embedded computing Intelligent systems Network servers Computer architecture

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Syntheses and cofluorescence of complexes of Eu(Ⅲ)/Y(Ⅲ) with terephthalic acid, 2-thenoyltrifluoroacetone and trioctylphosphine oxide

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中国有色金属学会会刊：英文版 2007年第3期17卷 638-643页

作者：赵学辉黄可龙刘素琴焦飞鹏刘志国胡舜钦李朝建 School of Chemistry and Chemical Engineering Central South University Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province Hunan University of Technology

A series of Eu( Ⅲ )/Y( Ⅲ ) complexes of terephthalic acid(TPA) with 2-thenoyltrifluoroacetone(HTTA) and trioctylphosphine oxide(TPPO) were synthesized. Compositions of these complexes are revealed to be Eu2(1-x)Y2x(TPA)(TTA)4- (TPPO)4 or Eu1-xYx(TPA)(TTA)(TPPO)2. Their IR spectra, fluorescent spectra and the thermal and optical stability were studied. The fluorescent excitation spectra of these complexes show more broad excitation bands than those of Eu2(TPA)3(TPPO)4 and Eu(TTA)3(TPPO)2 corresponding to their formations. In addition, both the binuclear complex EuY(TPA)(TTA)4(TPPO)4 and the chain complex Eu0.4Y0.6(TPA)(TTA)(TPPO)2 present higher thermal stability and better optical stability than the mononuclear complex Eu(TTA)3(TPPO)2 does. And their thermal and optical stabilities are preferably interpreted from the binuclear structure together with the chain polynuclear structure of the complexes. The fluorescence enhancement of cofluorescence Y3+ ions to the Eu(Ⅲ) complexes is clear. The optimum content of Y3+ is 0.6 (molar fraction) for the chain complexes Eu1-xYx(TPA)(TTA)- (TPPO)2 and 0.5 for the binuclear complexes Eu2(1-x)Y2x(TPA)(TTA)4(TPPO)4. The formation of polynuclear structure of the complex Eu1-xYx(TPA)(TTA)(TPPO)2 appears to be responsible for the good cofluorescence effect of Y3+ ions.

关键词：铕元素对酞酸 2-噻吩甲酰基三氟丙酮合成方法

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Syntheses and applications of Eu(Ⅲ) complexes of 2-thienyltrifluoroacetonate, terephthalic acid and phenanthroline as light conversion agents

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Journal of Central South University of technology 2007年第1期14卷 62-67页

作者：赵学辉黄可龙焦飞鹏杨幼平李朝建刘志国胡舜钦 School of Chemistry and Chemical Engineering Central South University Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province Hunan University of Technology

A series of europium（Ⅲ） complexes of 2-thienyltrifluoroacetonate （HTTA）, terephthalic acid （TPA） and phenanthroline （Phen） were synthesized. The new complexes Eu（TPA）（TTA）Phen and EUE（TPA）（TTA）4Phen2 were characterized by elemental analysis, IR spectrum, scanning electron microscope and thermal stability analysis. The results show that the thermal stability of the Eu（Ⅲ） complexes increases in the following order： the mononuclear complex Eu（TTA）3Phen, the binuclear complex EUE（TPA）（TTA）4Phen2, the chain polynuclear complex Eu（TPA）（TTA）Phen. And the formation of the binuclear/polynuclear structure of the new complexes appears to be responsible for the enhancement of their thermal and optical stability. In addition, The fluorescence excitation spectra of these new complexes show more broad excitation bands than that of the complex Eu（TTA）3Phen corresponding to their formation. The enhancement of Eu^3＋ fluorescence in the new complexes can be observed by the addition of Gd^3＋. The bright red luminescent plastics can be obtained when the complex EuGd（TPA）（TTA）4Phen2 is added above 0.5% （mass fraction）.

关键词： fluorescent properties europium terephthalic acid 2-thienyltrifluoroacetonate

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A novel strategy for in situ maskless synthesis of biochips:Self-driving micro-fluid porous type printing (SMPTP)

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Chinese Chemical Letters 2007年第1期18卷 111-114页

作者： Nong Yue He Ya Fei Guo Song Li Jian-Xin Tang State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Key Laboratory of Green-Packaging and Application of Bionanotechnology of Hunan Province Zhuzhou Institute of Technology Zhuzhou 412008 China

A novel maskless technique, self-driving micro-fluid porous type printing （SMPTP）, was reported to in situ synthesize oligonucleotide arrays on glass slide, which has the merits of low cost, high quality and simple craft. In SMPTP for fabricating gene- chips, porous fiber tubes with a number of nanometric or micron channels functioned as ＂active letters＂ and were assembled in designed patterns, which are identical to the distribution of monomers in each layer of the array, and four patterns were needed for each layer. By means of capillarity, the synthesis solution was automatically taken into porous tubes assembled in a printing plate and reached the surface. An oligonucleotide array of 160 features with four different 15-mer probes was in situ synthesized using this technique. The four specific oligonucleotide probes, including the matched and the mismatched by the fluorescent target sequence, gave obviously different hybridization fluorescent signals.

关键词： Typography Oligonucleotide In situ synthesis DNA microarrays Biochips

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