Pub Date : 2014-01-01DOI: 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
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.
{"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":"光学技术","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144002.0151
李. L. Xiang, 唐东川 Tang Dongchuan, 刘万奎 Liu Wankui, 谢敬辉 Xie Jinghui, 刘. L. Yue
Large-format arbitrary-surface projection technique has been widely applied in such fields as exhibition,release of new product and virtual simulation etc.The applications and research status of the large-format arbitrary-surface projection technique are analyzed.A novel large-format arbitrary-surface projection method is proposed,which includes camera calibration,structured light coding,geometry correction based on the observer view etc.The system structure and implementation for the 3Darchitectural model projection is also described.Experimental results prove that the proposed method meets the requirements of architectural projection.
{"title":"Study on large-format arbitrary-surface multi-projectordisplay for 3D architectural models","authors":"李. L. Xiang, 唐东川 Tang Dongchuan, 刘万奎 Liu Wankui, 谢敬辉 Xie Jinghui, 刘. L. Yue","doi":"10.3788/GXJS20144002.0151","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0151","url":null,"abstract":"Large-format arbitrary-surface projection technique has been widely applied in such fields as exhibition,release of new product and virtual simulation etc.The applications and research status of the large-format arbitrary-surface projection technique are analyzed.A novel large-format arbitrary-surface projection method is proposed,which includes camera calibration,structured light coding,geometry correction based on the observer view etc.The system structure and implementation for the 3Darchitectural model projection is also described.Experimental results prove that the proposed method meets the requirements of architectural projection.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"151-155"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70263115","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144003.0254
杨松松 Yang Songsong, 刘爱莲 Liu Ailian, 陈武奋 Chen Wufen, 段朝磊 Duan Chaolei, 胡万层 Hu Wanceng, 李川 Li Chuan
Through the study of ice and water temperature distribution near the interface,a new method of ice detection is found and the theoretical guidance is provided for the research of ice and water transformation.By putting the ice into the water,the ice-water heat transfer have an effect on the water temperature near the interface.Through the study of the temperature distribution,which is 5~9cm、0~4cm、-4~0cm、-5~-9cm to the ice water interface,the fitting section function is got,which named relation function of points from ice and water interface between the distance and temperature.The fitting values and monitoring error is between±0.1~0.3℃.The temperature difference of ice and water interface is bigger;the ice change into water is faster,which is more easily leaded to ice.
{"title":"Temperature field distribution detection research at ice and water near the interface by using fiber Bragg grating","authors":"杨松松 Yang Songsong, 刘爱莲 Liu Ailian, 陈武奋 Chen Wufen, 段朝磊 Duan Chaolei, 胡万层 Hu Wanceng, 李川 Li Chuan","doi":"10.3788/GXJS20144003.0254","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0254","url":null,"abstract":"Through the study of ice and water temperature distribution near the interface,a new method of ice detection is found and the theoretical guidance is provided for the research of ice and water transformation.By putting the ice into the water,the ice-water heat transfer have an effect on the water temperature near the interface.Through the study of the temperature distribution,which is 5~9cm、0~4cm、-4~0cm、-5~-9cm to the ice water interface,the fitting section function is got,which named relation function of points from ice and water interface between the distance and temperature.The fitting values and monitoring error is between±0.1~0.3℃.The temperature difference of ice and water interface is bigger;the ice change into water is faster,which is more easily leaded to ice.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"254-257"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264588","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144004.0298
刘艳丽 Liu Yanli, 朱达荣 Zhu Darong, 张德祥 Zhang Dexiang, 刘芳 Liu Fang
The characteristic that samples are high dimensional and small is typical for face recognition(FR).It is a key point to develop effective feature extraction approach for FR problem.A method to produce multiple copies of a face image is proposed while doing downsampling on original image.The experiment indicates that the proposed method can improve the recognition accuracy of classifiers.
{"title":"A face recognition method based on sample generation","authors":"刘艳丽 Liu Yanli, 朱达荣 Zhu Darong, 张德祥 Zhang Dexiang, 刘芳 Liu Fang","doi":"10.3788/GXJS20144004.0298","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0298","url":null,"abstract":"The characteristic that samples are high dimensional and small is typical for face recognition(FR).It is a key point to develop effective feature extraction approach for FR problem.A method to produce multiple copies of a face image is proposed while doing downsampling on original image.The experiment indicates that the proposed method can improve the recognition accuracy of classifiers.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"298-301"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264752","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144004.0345
穆永吉 Mu Yongji, 陈沅 Chen Yuan, 余. Y. Jun, 胡明勇 Hu Mingyong
Based on the basic theory of classical White-Cell,the formulas of the total optical path(OP)and the distribution of the beam spots of the Multi-Pass White Cell are deduced.The two basic conclusions are obtained after the formulas are analyzed,that:the distance between successive odd images equals to that between successive even images,and equals to twice that between the centers of curvatures of the secondary mirrors;the OP approximates 2(N+1)Lwhen the number of the beam spots on the primary mirror is N.The classical White-Cell is improved to take advantage of the intermediate optical path while reducing the diameter of the primary mirror according to the result of analysis.The new configuration is simulated and optimized with CODE V.Through the practical alignment,the formulas and the conclusions are proved right and proper for guiding the Multi-Pass Cell design.
{"title":"Study and design of a kind of Multi-Pass White Cell","authors":"穆永吉 Mu Yongji, 陈沅 Chen Yuan, 余. Y. Jun, 胡明勇 Hu Mingyong","doi":"10.3788/GXJS20144004.0345","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0345","url":null,"abstract":"Based on the basic theory of classical White-Cell,the formulas of the total optical path(OP)and the distribution of the beam spots of the Multi-Pass White Cell are deduced.The two basic conclusions are obtained after the formulas are analyzed,that:the distance between successive odd images equals to that between successive even images,and equals to twice that between the centers of curvatures of the secondary mirrors;the OP approximates 2(N+1)Lwhen the number of the beam spots on the primary mirror is N.The classical White-Cell is improved to take advantage of the intermediate optical path while reducing the diameter of the primary mirror according to the result of analysis.The new configuration is simulated and optimized with CODE V.Through the practical alignment,the formulas and the conclusions are proved right and proper for guiding the Multi-Pass Cell design.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"322 1","pages":"345-348"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265269","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144005.0416
蒋礼威 Jiang Liwei, 王. W. Xin, 田义 Tian Yi, 严. Y. Hui, 李. L. Zhuo
In order to test the performance of IR guidance weapon systems in the outfield experiment,it is necessary to load an IR augmentation device on target drone to simulate the IR characteristics of a real target plane.The commonly used IR augmentation has low IR radiation intensity and can not reflect the direction dependent radiation properties.An IR augmentation technique based on optic method is introduced.A high brightness IR light source is used to generate IR radiation.The radiation intensity is controlled according to the missile target-plane distance and direction,which are detected by an optoelectric tracing system.Based on the simulation results of the radiation intensities with different distances and radiation angles,an optical system is designed.The experimental results indicate that the IR radiation characteristics of a target with a maximal radiation intensity of 1600W/sr is simulated by using the technique.
{"title":"An infrared radiant augmentation technique for target drones","authors":"蒋礼威 Jiang Liwei, 王. W. Xin, 田义 Tian Yi, 严. Y. Hui, 李. L. Zhuo","doi":"10.3788/GXJS20144005.0416","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0416","url":null,"abstract":"In order to test the performance of IR guidance weapon systems in the outfield experiment,it is necessary to load an IR augmentation device on target drone to simulate the IR characteristics of a real target plane.The commonly used IR augmentation has low IR radiation intensity and can not reflect the direction dependent radiation properties.An IR augmentation technique based on optic method is introduced.A high brightness IR light source is used to generate IR radiation.The radiation intensity is controlled according to the missile target-plane distance and direction,which are detected by an optoelectric tracing system.Based on the simulation results of the radiation intensities with different distances and radiation angles,an optical system is designed.The experimental results indicate that the IR radiation characteristics of a target with a maximal radiation intensity of 1600W/sr is simulated by using the technique.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"416-420"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265620","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144005.0406
官邦贵 Guan Banggui, 何恩节 He En-jie, 秦炎福 Qin Yanfu
The experiments of drilling cluster pinhole on 0.05 mm plastic film with fiber laser system are carried out.The parameters including laser power,pulse width,accessorial gases and gas pressure et al,which influencing the machining quality of plastic film cluster pinhole are analyzed.It is shown that the pinhole diameters increase while increasing laser power,laser pulse width and accessorial gas pressure.Comparing with nitrogen,oxygen produces bigger diameter,bad quality and greater heat affected zone because it supports combustion.Cluster pinholes whose diameters are 40±2μm are gained by adopting the optimal technological parameters.
{"title":"Precision laser machining of cluster pinhole on 0.05 mm plastic film with fiber laser","authors":"官邦贵 Guan Banggui, 何恩节 He En-jie, 秦炎福 Qin Yanfu","doi":"10.3788/GXJS20144005.0406","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0406","url":null,"abstract":"The experiments of drilling cluster pinhole on 0.05 mm plastic film with fiber laser system are carried out.The parameters including laser power,pulse width,accessorial gases and gas pressure et al,which influencing the machining quality of plastic film cluster pinhole are analyzed.It is shown that the pinhole diameters increase while increasing laser power,laser pulse width and accessorial gas pressure.Comparing with nitrogen,oxygen produces bigger diameter,bad quality and greater heat affected zone because it supports combustion.Cluster pinholes whose diameters are 40±2μm are gained by adopting the optimal technological parameters.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"406-409"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265892","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}
Pub Date : 2014-01-01DOI: 10.3788/GXJS20144005.0425
郭丽君 Guo Lijun, 陈富云 Chen Fuyun, 李英娜 Li Yingna, 赵振刚 Zhao Zhengang, 谢涛 Xie Tao, 李川 Li Chuan
The force of the anchor head has a significant impact on the safety of the anchor rod.In order to reflect the force status of the anchor head on-line,the two optical fiber Bragg grating along 45°are pasted on the surface at the midpoint of the two symmetry spokes,forming the spoke-and-wheel structure.The stress of anchor causes the shear deformation of spokes,and the deformation leads to the wavelength-shift of fiber Bragg grating.By measuring the center wavelength-shift of fiber Bragg grating,axial force at the anchor head on-line is monitored.The press experiment shows that the strain sensitivity of grating 1is 108.8pm/kN,grating 2is 115pm/kN;Linearity of grating 1is 0.042% FS,grating2 is 0.023% FS.
{"title":"Stress measurement at anchor head by using fiber Bragg grating","authors":"郭丽君 Guo Lijun, 陈富云 Chen Fuyun, 李英娜 Li Yingna, 赵振刚 Zhao Zhengang, 谢涛 Xie Tao, 李川 Li Chuan","doi":"10.3788/GXJS20144005.0425","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0425","url":null,"abstract":"The force of the anchor head has a significant impact on the safety of the anchor rod.In order to reflect the force status of the anchor head on-line,the two optical fiber Bragg grating along 45°are pasted on the surface at the midpoint of the two symmetry spokes,forming the spoke-and-wheel structure.The stress of anchor causes the shear deformation of spokes,and the deformation leads to the wavelength-shift of fiber Bragg grating.By measuring the center wavelength-shift of fiber Bragg grating,axial force at the anchor head on-line is monitored.The press experiment shows that the strain sensitivity of grating 1is 108.8pm/kN,grating 2is 115pm/kN;Linearity of grating 1is 0.042% FS,grating2 is 0.023% FS.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"425-428"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265931","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}
in order to analyze the influence of slurry particle size on materials removal consequent,in experiment,different average size and different proportions of slurry particle are chosen to polish the K9 glass.After polishing progress,the result of quantitative research on the material removal rate and roughness shows that,under the same experiment condition,the smaller the average size of slurry particle are,the smaller the roughness of the workpiece can be obtained.In the experiment about different proportions of slurry particle,the uniformity of slurry particle is a very important factor to influence the surface roughness.Under the condition that near the peak of the particle size distribution there is similar percentage,the range of the particle size is more smaller,the surface roughness after polishing is more smaller.
{"title":"Experimental study of the influence of slurry particle size on material removal consequent in bowl-feed polishing","authors":"张. Z. Yang, 徐清兰 Xu Qinglan, 陈梅 Chen Mei, 张蓉竹 Zhang Rongzhu","doi":"10.3788/GXJS20144006.0486","DOIUrl":"https://doi.org/10.3788/GXJS20144006.0486","url":null,"abstract":"in order to analyze the influence of slurry particle size on materials removal consequent,in experiment,different average size and different proportions of slurry particle are chosen to polish the K9 glass.After polishing progress,the result of quantitative research on the material removal rate and roughness shows that,under the same experiment condition,the smaller the average size of slurry particle are,the smaller the roughness of the workpiece can be obtained.In the experiment about different proportions of slurry particle,the uniformity of slurry particle is a very important factor to influence the surface roughness.Under the condition that near the peak of the particle size distribution there is similar percentage,the range of the particle size is more smaller,the surface roughness after polishing is more smaller.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"486-491"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266131","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}
Pub Date : 2014-01-01DOI: 10.3788/gxjs20144006.0492
Xue Chenx
The error model of Shupe effect is analysed theoretically,the radial temperature levels of fiber coil will produce the zero bias drift of FOG.The experiment to measure the effect of the ambient temperature on the temperature of the fiber is designed and completed,there is a linear relationship between the change rate of ambient temperature and the error of Shupe effect.Based on the analysis,the experiment to measure the FOG output is designed under the conditions of temperature changing,the gyro output trend is modelled using the first-order、second-order and third-order.The raw data of the gyro output are compensated,the obtained temperature model is verified to set the different temperature curve under the same conditions.The result shows that using the first-order model of temperature changing the error value caused by Shupe effect can be most accurately reflected,comparing with the second-order and third-order model,it is more simple and more stable,and has good compensation effect,and this is also consistent with the conclusions of the theoretical analysis.
{"title":"Temperature compensation model research on fiber optic gyroscope","authors":"Xue Chenx","doi":"10.3788/gxjs20144006.0492","DOIUrl":"https://doi.org/10.3788/gxjs20144006.0492","url":null,"abstract":"The error model of Shupe effect is analysed theoretically,the radial temperature levels of fiber coil will produce the zero bias drift of FOG.The experiment to measure the effect of the ambient temperature on the temperature of the fiber is designed and completed,there is a linear relationship between the change rate of ambient temperature and the error of Shupe effect.Based on the analysis,the experiment to measure the FOG output is designed under the conditions of temperature changing,the gyro output trend is modelled using the first-order、second-order and third-order.The raw data of the gyro output are compensated,the obtained temperature model is verified to set the different temperature curve under the same conditions.The result shows that using the first-order model of temperature changing the error value caused by Shupe effect can be most accurately reflected,comparing with the second-order and third-order model,it is more simple and more stable,and has good compensation effect,and this is also consistent with the conclusions of the theoretical analysis.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266198","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}
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