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A fast motion estimation searching method based on the multi-start and concurrent algorithm 一种基于多启动并行算法的快速运动估计搜索方法
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144002.0140
于. Y. Fei, 林喆 Lin Zhe, 赵跃进 Zhao Yuejin, 董立泉 Dong Liquan, 康晓军 Kang Xiaojun
{"title":"A fast motion estimation searching method based on the multi-start and concurrent algorithm","authors":"于. Y. Fei, 林喆 Lin Zhe, 赵跃进 Zhao Yuejin, 董立泉 Dong Liquan, 康晓军 Kang Xiaojun","doi":"10.3788/GXJS20144002.0140","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0140","url":null,"abstract":"A novel searching method of matching block based on the concurrent and multi-start algorithm is presented to improve the search speed,accuracy and robustness in the fast operation of the block-matching motion estimation.The method of choosing starting points evenly is presented based on the characteristic of the block matching search,and the adaptive conditions and adaptive schedule is established based on the searching region.In the processing of iteration,the new method can not only adapt to the solution that lead the objective to the correct direction,but also adapt to the solution that have a little offset comparing with the objective.Therefore the concurrent and multi-start algorithm can be easy to keep from the trap of local minima effectively.The image processing system based on the DSP chip of TMS320C6415is used to make the experiment for the video with shaking images.The results of experiment show that,when the television broadcasting system of camera is PAL,the image resolution of video is 720×576pixels and the shaking motion between the adjacent images is in the scope of±40pixels,the computational complexity of block matching parameters based on the novel method is not more than one eighth of the computational complexity based on the full-search(FS)method,and the searching accuracy of the novel method is much greater than the other traditional fast searching method.The method can improve the searching speed and achieve the high searching accuracy at the same time.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"140-144"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262631","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
Tensile stress measurement reasearch of anchor cable by using optical fiber Bragg grating 利用光纤光栅测量锚索拉应力的研究
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144002.0160
庄君刚 Zhuang Jun-gang, 赵振刚 Zhao Zhenggang, 李英娜 Li Yingna, 谢涛 Xie Tao, 李川 Li Chuan
{"title":"Tensile stress measurement reasearch of anchor cable by using optical fiber Bragg grating","authors":"庄君刚 Zhuang Jun-gang, 赵振刚 Zhao Zhenggang, 李英娜 Li Yingna, 谢涛 Xie Tao, 李川 Li Chuan","doi":"10.3788/GXJS20144002.0160","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0160","url":null,"abstract":"Anchor cable usually works in high tensile stress state,the security and stability of slope are related to the health of anchor cable.In order to reflect the real-time tensile stress state of the anchor cable,the optical fiber Bragg grating is installed on the surface of a single wire of the anchor cable.The anchor cable will deform under the action of forces,which makes the center wavelength of the optical fiber Bragg grating shift.Tensile stress test shows that the tensile stress sensitivity is 19.9pm/kN,the linearity is 1.02%FS.The tensile stress which is applied in the anchor cable can be online monitoring by measuring the center wavelength of the optical fiber Bragg grating.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"160-162"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70263336","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
Design and numerical studies of composite defect photonic crystal optical filter 复合缺陷光子晶体滤光片的设计与数值研究
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144002.0172
陈. C. Ying, 刘腾 Liu Teng, 卢波 Lu Bo, 范卉青 Fan Huiqing
{"title":"Design and numerical studies of composite defect photonic crystal optical filter","authors":"陈. C. Ying, 刘腾 Liu Teng, 卢波 Lu Bo, 范卉青 Fan Huiqing","doi":"10.3788/GXJS20144002.0172","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0172","url":null,"abstract":"To eliminate the multimode property of the photonic crystal ring cavity filter,a composite defect photonic crystal filter structure combined point defect with ring cavity is proposed,in which the line defect is taken as the main waveguide and the load waveguide combining the point defect with the ring cavity is adopted to achieve the filtering for the certain wavelength.By changing the refractive index of the rods in the general photonic crystal structure,the refractive index of the point defect or the size of the point defect,the influences on the filtering property is analyzed.Mis regarded as m=r-point/r,the numerical simulation result shows that the filtering wavelength will remain the same the filtering characteristic when mis varied from 0to 0.6,while mis in the reasonable range from 0.6to 1.8,the single longitudinal mode filtering characteristic and its tunability can be achieved by changing the point defect radius,which can make the effective theoretical reference for the design of multi-channel filter.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"172-175"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70263514","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
Low-concentration detection of benzene using laser Raman spectroscopy 激光拉曼光谱法检测低浓度苯
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144003.0195
马. M. Jing, 黄蓉 Huang Rong
{"title":"Low-concentration detection of benzene using laser Raman spectroscopy","authors":"马. M. Jing, 黄蓉 Huang Rong","doi":"10.3788/GXJS20144003.0195","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0195","url":null,"abstract":"Laser Raman spectroscopy technique based on Raman scattering theory has the advantages of rapid,nondestructive,and without sample pretreatment.25samples of benzene with different concentrations are studied by using laser Raman spectroscopy technique.The results show that in the 184.8g/L~0.264g/L concentration range,the linear relationship between the intensity of Raman lines of benzene and its concentration.The linear correlation coefficient of R=0. 99626is obtained by using the least square method.The detection limit is 0.223g/L.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"195-198"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264435","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
A new method of making real-color rainbow hologram with wide viewing angle 一种制作宽视角真彩色彩虹全息图的新方法
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144003.0205
甘亮勤 Gan Liangqin, 曾胜财 Zeng Shengcai, 杨上供 Yang Shanggong
{"title":"A new method of making real-color rainbow hologram with wide viewing angle","authors":"甘亮勤 Gan Liangqin, 曾胜财 Zeng Shengcai, 杨上供 Yang Shanggong","doi":"10.3788/GXJS20144003.0205","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0205","url":null,"abstract":"In order to improve the color effect and the visual angle of hologram,based on the method of mirror images,a new technique is proposed to obtain a real color hologram with a large viewing angle by the combination of computer-generated hologram and optical hologram.There are two steps to realize the method:Firstly,computer-generated hologram H1r,H1g,H1bis yielded with three image objects.Secondly,a rainbow hologram H2is generated by optical ways.In terms of the reversibility of light path principle,an image with a wide viewing angle is reconstructed by reversing the reconstructed wave.The technique achieves a color reconstruction image with a wide viewing angle of 14°.The color effect and the stereoscopic effect of the reconstruction image is increased.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"205-208"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264450","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
Optimization of reconstructed images of 3-D phase hologram based on phase-only spatial light modulator 基于纯相位空间光调制器的三维相位全息图重构图像优化
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144003.0230
梁浩聪 Liang Hao-cong, 蒋晓瑜 Jiang Xiaoyu, 牛树来 Niu Shulai, 闫兴鹏 Yan Xingpeng, 赵. Z. Kai
{"title":"Optimization of reconstructed images of 3-D phase hologram based on phase-only spatial light modulator","authors":"梁浩聪 Liang Hao-cong, 蒋晓瑜 Jiang Xiaoyu, 牛树来 Niu Shulai, 闫兴鹏 Yan Xingpeng, 赵. Z. Kai","doi":"10.3788/GXJS20144003.0230","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0230","url":null,"abstract":"Based on the existed ways of 2-D reconstructed images by spatial light modulator(SLM),the methods to enhance the reconstructed quality of 3-D images are investigated.Based on the diffraction theory,the effects of a lattice SLM with a limited fill factor on the reconstructed images are analyzed.The effective light is moved away from the center optical axis by coding the double linear phases into the phase-only hologram,so the details of the original patterns can be reconstructed completely.The two focused planes of reconstructed images and the multi-order beams caused by the lattice structure of the SLM can be separated spatially,through adding the phases of doubleconvergent spherical wave.The spatial filter is used to eliminate the influences of higher-orders diffraction beams and zero-order light of reconstructed images,respectively.A holographic optoelectronic display system based on liquid crystal spatial light modulator(LC-SLM) is set up to demonstrate this method.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"230-234"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264532","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
Research on transmission power spectrum of tilted fiber Bragg grating temperature sensing 倾斜光纤光栅温度传感的传输功率谱研究
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144004.0327
高宇飞 Gao Yufei, 刘. L. Chao, 张. Z. Yong
{"title":"Research on transmission power spectrum of tilted fiber Bragg grating temperature sensing","authors":"高宇飞 Gao Yufei, 刘. L. Chao, 张. Z. Yong","doi":"10.3788/GXJS20144004.0327","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0327","url":null,"abstract":"Based on mode coupling theory,tilted fiber Bragg grating temperature sensing principle and the characteristics of transmission spectrum of fundamental modes and high-modes are proposed.The temperature shift of fundamental modes resonance wavelength and high-order modes resonance wavelength is investigated by means of simulation method.The tilted angle on the effect of resonance wavelength is discussed.The results show that the different resonance wavelengths are linealy increased with surrounding temperature.The center wavelength of transmission spectrum is non-drift with the increase of tilted angle,and the width of transmission spectrum decreases with the increase of tilted angle.The result has a certain guiding function to the application of the tilted fiber Bragg grating.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"327-330"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264936","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
Optical characteristics analysis of grating light valve and application in thermal CTP system 光栅光阀光学特性分析及其在热敏CTP系统中的应用
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144004.0371
缪斌鹰 Miao Binying, 唐正宁 Tang Zhengning
{"title":"Optical characteristics analysis of grating light valve and application in thermal CTP system","authors":"缪斌鹰 Miao Binying, 唐正宁 Tang Zhengning","doi":"10.3788/GXJS20144004.0371","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0371","url":null,"abstract":"The grating light valve(GLV)is a diffractive MOEMS spatial light modulator,and it has been successfully applied in the computer-to-plate(CTP)system by modulating laser beams.A simplified grating light valve optical model is put forward,and the optical characteristics of GLV is analyzed according to Fraunhofer single-slit diffraction theory and multiple beam interference theory.The application of grating light valve in thermal CTP system is described,and the structure and imaging principle of GLV optical write engine are analyzed.The digital imaging process of the GLV-based thermal CTP system is concluded,which provides the theory basis for the domestic printing enterprise to use the thermal imaging technology.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"371-375"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265293","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
Analysis of flow field characteristics in fluid jet polishing 射流抛光流场特性分析
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144004.0376
罗银川 Luo Yinchuan, 李秀龙 Li Xiulong, 张. Z. Yang, 张蓉竹 Zhang Rongzhu, 杨李茗 Yang Liming
{"title":"Analysis of flow field characteristics in fluid jet polishing","authors":"罗银川 Luo Yinchuan, 李秀龙 Li Xiulong, 张. Z. Yang, 张蓉竹 Zhang Rongzhu, 杨李茗 Yang Liming","doi":"10.3788/GXJS20144004.0376","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0376","url":null,"abstract":"By analyzing the flow field characteristics of impinging jet,mathematical relationship between the impact angle,stand-off distance,jet velocity and the pressure,velocity on wall is established.The influence of different parameters on fluid jet distribution is analyzed by quantitative calculate,the results indicate that the pressure and velocity on wall with the outlet pressure,velocity is linearly proportional.When the impact distance is greater than 9.6times of the diameter of nozzle,the pressure and velocity on wall decrease with the increasing of stand-off distance.The peak pressure reduces to 0.54times of the pressure of spout when the impact distance increases to 15times of the diameter of nozzle.And they decrease with the decreasing of impact angle.When impact angles are 90°,60°,45°,ps=0.95p0,0.74p0,0.475p0,and um02=0.96u0,0.8u0,0.67u0are got respectively.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"376-380"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265331","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
An edge detection method based on the Sobel and K-means 基于Sobel和K-means的边缘检测方法
Guangxue Jishu/Optical Technique Pub Date : 2014-01-01 DOI: 10.3788/GXJS20144005.0394
杨. Y. Kun, 张明鑫 Zhang Mingxin, 先晓兵 Xian Xiaobing, 郑金龙 Zheng Jinlong, 聂盼红 Nie Panhong
{"title":"An edge detection method based on the Sobel and K-means","authors":"杨. Y. Kun, 张明鑫 Zhang Mingxin, 先晓兵 Xian Xiaobing, 郑金龙 Zheng Jinlong, 聂盼红 Nie Panhong","doi":"10.3788/GXJS20144005.0394","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0394","url":null,"abstract":"The result of the image processed by traditional edge detection operator is an edge sharpening gradient image.In order to get the binary edge image,it requires determining the threshold artificially.The loss of edge information is caused.So it uses the Sobel operator with increase convolution mask to get the gradient image.The threshold value through the steps K-means algorithm based on gradient histogram is got,the binary edge image is obtained by segmenting gradient image which uses the acquired threshold value,the edge is thinned and connected.The Otsu algorithm is used to check the correctness ofthreshold value and different edge detection approaches are compared with improved method.It obtains reasonable threshold value and has a better performance than improved Sobel operator and the result is close to Canny operator with optimal threshold.It can be applied in the field of machine vision.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"394-398"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265534","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
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