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2010 Symposium on Photonics and Optoelectronics最新文献

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A Fast and Sub-Pixel Detector for Grid-Like Target in Camera Calibration 一种快速亚像素的摄像机标定类网格目标检测器
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504245
Lejun Shen, Zhun-Yu Ke
{"title":"A Fast and Sub-Pixel Detector for Grid-Like Target in Camera Calibration","authors":"Lejun Shen, Zhun-Yu Ke","doi":"10.1109/SOPO.2010.5504245","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504245","url":null,"abstract":"Sub-pixel detection of target points is the performance bottleneck in camera calibration. Traditional algorithms are computational expensive or low precision when we do camera calibration in sport video analysis. In this paper, we propose a new algorithm to detect the grid-like target (i.e. tennis court in TV broadcasting). It has 3 parts: (1) color histogram based interested point classifier making our method faster; (2) sub-pixel refinement by non-linear least squares method improving the accuracy; (3) extended line scan using interested point as the start/end point finding the final line parameters. Results indicate that our detector is faster (<9ms), more accurate and requires less memory than Hough based algorithms if target is grid-like: \"straight lines link together\".","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121538837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Research of Liquid Level Measurement Based on Linear CCD 基于线阵CCD的液位测量研究
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504358
Qiang Wen, Weiqiang Wang, Yongfeng Shao
{"title":"A Research of Liquid Level Measurement Based on Linear CCD","authors":"Qiang Wen, Weiqiang Wang, Yongfeng Shao","doi":"10.1109/SOPO.2010.5504358","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504358","url":null,"abstract":"A new method of liquid level measurement based on linear charge coupled device is presented in this paper. It is proposed that the liquid level images are directly projected onto the linear charge coupled device without any optical lens by using light emitting diode. The method is studied experimentally with a measuring device, which is designed for the proposed method on the basis of field programmable gate array and a host computer. Field programmable gate array is used as the control core to generate timing pulses and to control the main chips of the hardware circuit. The host computer is used to process the image data. The proposed method is on the basis of the contact measurement and has the advantages of high precision, high reliability, good real-time performance and so on. The experimental results show that the changes of the temperature have little effect on the measuring accuracy. In addition, the measuring device works normally even in some rigorous environments, such as in corrosive liquid and in sloshing liquid. Therefore, the proposed method has great potentialities, especially in small range and high precision situation.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114856713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
D-Shaped Optical Fiber Microwire Devices d型光纤微线器件
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504442
Junlong Kou, Zhang-di Huang, Fei Xu, Yan-qing Lu
{"title":"D-Shaped Optical Fiber Microwire Devices","authors":"Junlong Kou, Zhang-di Huang, Fei Xu, Yan-qing Lu","doi":"10.1109/SOPO.2010.5504442","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504442","url":null,"abstract":"D-shaped optical fiber microwire (OFM) devices are investigated theoretically. They can be fabricated by wrapping the OFM on a removable rod or substrate. Optical wave guiding properties of these devices are discussed with numerical simulations. Dispersion properties of OFMs with different radius are studied as well. A grating based D-shaped OFM is proposed for sensing applications. The corresponding sensitive could reach 1100 nm/RIU (Refractive Index Unit) due to its large outside evanescent field.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124329202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinearity- and Dispersion-Managed Solitons in Optical Fiber Systems 光纤系统中的非线性和色散管理孤子
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504128
Xiujun He, K. Xie, A. Xiang, Zhenhai Wu
{"title":"Nonlinearity- and Dispersion-Managed Solitons in Optical Fiber Systems","authors":"Xiujun He, K. Xie, A. Xiang, Zhenhai Wu","doi":"10.1109/SOPO.2010.5504128","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504128","url":null,"abstract":"On the basis of the variational approach, this paper examines the dynamics of a pulse in fibers with periodic dispersion and nonlinearity. With this approach, a set of couple different equations for the evolution of the pulse width and chirp are obtained. We annalyse the propagation of dispersion and nonlinearity-managed solitons. The result demonstrates that compared with only dispersion management, a dispersion and nonlinearity-managed soliton can propagate with higher quality. Significantly, when the propagation distance increases, the pulse width almost remains unchangeable.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125446275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculated Simulation of Modes for Active Cavity 有源空腔模态的计算仿真
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504331
Chen Feng, G. Feng, Wei Li, N. Sun, Zhengyu Zhang, Shouhuan Zhou
{"title":"Calculated Simulation of Modes for Active Cavity","authors":"Chen Feng, G. Feng, Wei Li, N. Sun, Zhengyu Zhang, Shouhuan Zhou","doi":"10.1109/SOPO.2010.5504331","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504331","url":null,"abstract":"Using Fox-Li iterative method and split step Fourier transform, the active cavity modes of uniform and non-uniform gain have been simulated and studied.. In the calculation, the output coupling mirror loss, the diffraction loss and the inner-cavity loss, have been taken into consideration. The calculation results indicate that in the condition of uniform gain, small signal gain coefficient (SSG) increasing, higher order modes' gain are greater than loss. The output power increases and laser beam quality gets worse. In the condition of non-uniform gain, the mode near threshold is symmetric distribution. When the gain gets increasing, light intensity increases, non-uniform pump impact of the mode field increasingly evident. Mode field peak offsets to the pump direction and beam quality gets worse.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125778601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Study of Realistic Image Rendition Algorithms Based on Human Visual System 基于人类视觉系统的逼真图像再现算法研究
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504478
L. Lv, Kun Gao, Guoqiang Ni, Man-jun Xiao
{"title":"The Study of Realistic Image Rendition Algorithms Based on Human Visual System","authors":"L. Lv, Kun Gao, Guoqiang Ni, Man-jun Xiao","doi":"10.1109/SOPO.2010.5504478","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504478","url":null,"abstract":"Realistic image rendition is to reproduce the human perception of natural scenes, where the \"realistic\" means providing machine vision with the ideal images according to human visual system. The main characteristics of realistic image rendition involve color constancy, lightness constancy, image enhancement and high dynamic range compression. In this paper, the developments on realistic image rendition are investigated, human visual system structure and characteristics are described in detail and some excellent algorithms are studied and discussed, especially the classical Retinex series algorithms and tone mapping algorithms. In the end, the performances of these algorithms are simulated and shown.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127935448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental Demonstration for a Novel Optical Multiplexing Scheme Based on Dispersion Matching 一种基于色散匹配的新型光复用方案的实验验证
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504016
Liang Cheng, Dawei Wang, Cheng Luo, Biao Chen
{"title":"Experimental Demonstration for a Novel Optical Multiplexing Scheme Based on Dispersion Matching","authors":"Liang Cheng, Dawei Wang, Cheng Luo, Biao Chen","doi":"10.1109/SOPO.2010.5504016","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504016","url":null,"abstract":"A novel all-optical multiplexing scheme based on dispersion matching technique is proposed and experimentally demonstrated. The multiplexing parts are constructed by employing only standard single mode fibers and dispersion compensation fibers, which are simple and stable. The eye diagrams and bit error rate performance of such a multiplexing transmission system are also shown in this letter.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"42 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130202049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A PCNN-Based Edge Detection Algorithm for Rock Fracture Images 基于pcnn的岩石断裂图像边缘检测算法
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504347
Changtao He, Weixing Wang
{"title":"A PCNN-Based Edge Detection Algorithm for Rock Fracture Images","authors":"Changtao He, Weixing Wang","doi":"10.1109/SOPO.2010.5504347","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504347","url":null,"abstract":"Image segmentation has attracted the attention of researchers for many decades. Different approaches have been developed in order to find out the solution in many different segmentation situations. In this paper a novel method for rock fracture image using improved pulse coupled neural networks (PCNN) is presented. We apply progressive scan and region marked method to detect accurate edges of rock fracture images, the experiment results show that the proposed method can be used as a new image edge detection method. Compared to the traditional edge detection algorithms such as Canny operator and the other edge detection operators (e.g. vector gradient and MV), the proposed method can easily obtain the rock fracture images' orientations, curvatures, lengths, apertures and other useful information.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134221003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Study of THz Oscillations in GaN-Based Planar Nanodevices 氮化镓基平面纳米器件的太赫兹振荡研究
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504333
K. Xu, A. Song, Z. Chen, Z. Zheng, G. Wang
{"title":"Study of THz Oscillations in GaN-Based Planar Nanodevices","authors":"K. Xu, A. Song, Z. Chen, Z. Zheng, G. Wang","doi":"10.1109/SOPO.2010.5504333","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504333","url":null,"abstract":"The feasibility of THz oscillations in a GaN-based planar nanoscale unipolar diode, or a self-switching device (SSD), is analyzed using Monte Carlo simulations. The origin of THz oscillations is contributed to Gunn-effect. The dependence of the Gunn oscillations on geometric parameters and bias conditions has been studied. By using proper parameters, the oscillation frequency can reach 0.6 THz. Moreover, potential applications are discussed in terms of the ease of heat dissipation and generation of oscillations at different frequencies on a single chip, in contrast to a conventional vertical-structure Gunn diode.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134453398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Visibility Measurement Using Digital Cameras in Qingdao 青岛地区用数码相机测量能见度
2010 Symposium on Photonics and Optoelectronics Pub Date : 2010-06-19 DOI: 10.1109/SOPO.2010.5504477
Bin Zhang
{"title":"Visibility Measurement Using Digital Cameras in Qingdao","authors":"Bin Zhang","doi":"10.1109/SOPO.2010.5504477","DOIUrl":"https://doi.org/10.1109/SOPO.2010.5504477","url":null,"abstract":"Visibility is an important meteorological element which affects people's daily life in many fields, such as aviation, navigation and land transportation. An easy method to measure visibility was presented in this paper. Digital camera was adopted to get the images of a target which had a clear boundary between it and its background (such as the sky). Then the luminance ratio method was applied to obtain the visibility. To verify the feasibility of this method, image data were taken at 8:00, 11:00, 14:00 and 17:00 every day using a digital camera in Qingdao. The visibility values were compared with those announced by Qingdao Meteorological Bureau, and the deviations were acceptable. In view of the simplicity of this measurement method, it is promising in the future for application in real life.","PeriodicalId":155352,"journal":{"name":"2010 Symposium on Photonics and Optoelectronics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130815782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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