Pub Date : 2012-05-21DOI: 10.1109/SOPO.2012.6270558
Xuanbing Qiu, Gang Li, Jilin Wei, Cao Wei
In the embedded image detection of continuous casting billet defects, the image enhancement of crack is an important criterion in the subsequent recognition. The effect of image enhancement, especially the real-time of image enhancement, decides whether the system can be adopted or not. Based on the dual-core OMAP3530, we set up an embedded real-time online testing hardware device. Taking the system's real-time and the environmental noise of the high-temperature scene into account, the billet image, obtained by the CCD sensor, is simply and effectively enhanced by going through the Laplacian sharpening and the Histogram equalization. Matlab simulation analysis improves the Contrast Improvement Index (CII) of image and cuts down the simulating time; and it provides a powerful precondition for the subsequently billet defects real-time identification by DSP hardware.
{"title":"A Method of Crack Defects Real-Time Image Enhancement in Continuous Casting Billet","authors":"Xuanbing Qiu, Gang Li, Jilin Wei, Cao Wei","doi":"10.1109/SOPO.2012.6270558","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270558","url":null,"abstract":"In the embedded image detection of continuous casting billet defects, the image enhancement of crack is an important criterion in the subsequent recognition. The effect of image enhancement, especially the real-time of image enhancement, decides whether the system can be adopted or not. Based on the dual-core OMAP3530, we set up an embedded real-time online testing hardware device. Taking the system's real-time and the environmental noise of the high-temperature scene into account, the billet image, obtained by the CCD sensor, is simply and effectively enhanced by going through the Laplacian sharpening and the Histogram equalization. Matlab simulation analysis improves the Contrast Improvement Index (CII) of image and cuts down the simulating time; and it provides a powerful precondition for the subsequently billet defects real-time identification by DSP hardware.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"288 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132107689","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6271119
Xiaochi Chen, Y. Huo, E. Fei, G. Shambat, Xi Liu, T. Kamins, J. Vučković, J. Harris
In this paper, we report the enhanced direct band gap photoluminescence from carrier confinement in Ge quantum wells with SiGe barriers at room temperature. We have also fabricated a microdisk resonator and present the tapered-fiber coupled high-Q cavity mode from Ge quantum wells.
{"title":"Room Temperature Photoluminescence from Ge/SiGe Quantum Well Structure in Microdisk Resonator","authors":"Xiaochi Chen, Y. Huo, E. Fei, G. Shambat, Xi Liu, T. Kamins, J. Vučković, J. Harris","doi":"10.1109/SOPO.2012.6271119","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6271119","url":null,"abstract":"In this paper, we report the enhanced direct band gap photoluminescence from carrier confinement in Ge quantum wells with SiGe barriers at room temperature. We have also fabricated a microdisk resonator and present the tapered-fiber coupled high-Q cavity mode from Ge quantum wells.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134554150","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270954
Zhongwen An, Yongjun Zhang, G. Zhou, W. Gu
The CCD (Charge-coupled Device) image sensor with its high resolution is capable of providing high definition image. However, transmission requires high bandwidth, which makes it very difficult to process and transmit in a long distance. The purpose of this paper is to propose a new method to process and transmit CCD image, which can guarantee a low-bandwidth and long-distance data transmission. The innovation is that the transmission content of CCD image data can be flexibly selected and compressed firstly, which will reduce the transmission data. Then it is processed on the base of communication protocol so that it can be fit for wireless transmission. At last, it is transformed into wireless signal and transmitted using 3G technology. As a result, the paper presents a wireless transmission scheme with the rate of 1.5Mbps for CCD image.
{"title":"A New Low-Bandwidth and Wireless Transmission Scheme for CCd Image","authors":"Zhongwen An, Yongjun Zhang, G. Zhou, W. Gu","doi":"10.1109/SOPO.2012.6270954","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270954","url":null,"abstract":"The CCD (Charge-coupled Device) image sensor with its high resolution is capable of providing high definition image. However, transmission requires high bandwidth, which makes it very difficult to process and transmit in a long distance. The purpose of this paper is to propose a new method to process and transmit CCD image, which can guarantee a low-bandwidth and long-distance data transmission. The innovation is that the transmission content of CCD image data can be flexibly selected and compressed firstly, which will reduce the transmission data. Then it is processed on the base of communication protocol so that it can be fit for wireless transmission. At last, it is transformed into wireless signal and transmitted using 3G technology. As a result, the paper presents a wireless transmission scheme with the rate of 1.5Mbps for CCD image.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556953","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270430
Carlos Roberto Mingoto Junior, P. Kurka
A method to calculate the sensibility of a Computer Vision measurement system is presented in this paper. The specific mensuration done is for car wheel inclination. It will be shown that an equipment using cameras and no other clamp or accessory attached to the wheels to help the procedure to obtain angles from the steering suspension alignment by means of the wheel's images is a viable idea, but not, nowadays technologically realizable.
{"title":"Guidelines to Specify a Camera for Computer Vision Measurement of Vehicle Suspension Alignment Angles Based on the Desired Sensibility","authors":"Carlos Roberto Mingoto Junior, P. Kurka","doi":"10.1109/SOPO.2012.6270430","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270430","url":null,"abstract":"A method to calculate the sensibility of a Computer Vision measurement system is presented in this paper. The specific mensuration done is for car wheel inclination. It will be shown that an equipment using cameras and no other clamp or accessory attached to the wheels to help the procedure to obtain angles from the steering suspension alignment by means of the wheel's images is a viable idea, but not, nowadays technologically realizable.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134091683","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270985
P. Zobdeh, M. Daftari
The high order harmonics generation could be observed by the interaction between few-cycle laser pulses and plasma. Introduction of the different models in generation of high order harmonics causes the different power-law spectrum. In this paper, we have studied the effect of sliding and oscillating mirrors models and filtering effects of conductors on high order harmonics generated by these models. The optical specification of all filters materials are .calculated by WIEN2K code based on solid state matter structure.
{"title":"Comparision of XUV Filtering by Solid Layer for Attosecond Generation","authors":"P. Zobdeh, M. Daftari","doi":"10.1109/SOPO.2012.6270985","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270985","url":null,"abstract":"The high order harmonics generation could be observed by the interaction between few-cycle laser pulses and plasma. Introduction of the different models in generation of high order harmonics causes the different power-law spectrum. In this paper, we have studied the effect of sliding and oscillating mirrors models and filtering effects of conductors on high order harmonics generated by these models. The optical specification of all filters materials are .calculated by WIEN2K code based on solid state matter structure.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115331772","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6271001
Yuanjun Wang, S. Nie
In this paper, we extend a new registration framework from scalar image to diffusion tensor image. As the extension from scalar to tensor image is non-trivial, we write the process in detail. The registration framework is based on polynomial expansion transform. The idea of polynomial expansion is that the image is locally approximated by polynomials at each pixel. Registration algorithms are developed for affine model by observing the changes between source and target images locally, from their polynomial expansion coefficients. Experiments are tested on human diffusion tensor images.
{"title":"Diffusion Tensor Image Registration Based on Polynomial Expansion","authors":"Yuanjun Wang, S. Nie","doi":"10.1109/SOPO.2012.6271001","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6271001","url":null,"abstract":"In this paper, we extend a new registration framework from scalar image to diffusion tensor image. As the extension from scalar to tensor image is non-trivial, we write the process in detail. The registration framework is based on polynomial expansion transform. The idea of polynomial expansion is that the image is locally approximated by polynomials at each pixel. Registration algorithms are developed for affine model by observing the changes between source and target images locally, from their polynomial expansion coefficients. Experiments are tested on human diffusion tensor images.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115703727","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270426
Zhijun Zhang, Huimin Chen
Linear frequency modulated continuous wave(LFMCW) laser fuze ranging system needs to detect the intermediate frequency (IF) corresponding to the best detonating distance. This paper puts forward a method of Goertzel algorithm applied to the LFMCW laser fuze ranging system. By numerical simulation and comparison with the FFT algorithm we can see that the method applied to the LFMCW laser fuze ranging system can effectively achieves the detection of the difference frequency which contains distance information, and has good characters of real-time detection and easy project realization. The results show that the method applied to LFMCW laser fuze ranging system is reasonable and feasible.
{"title":"Research on Goertzel Algorithm of LFMCW Laser Fuze Ranging","authors":"Zhijun Zhang, Huimin Chen","doi":"10.1109/SOPO.2012.6270426","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270426","url":null,"abstract":"Linear frequency modulated continuous wave(LFMCW) laser fuze ranging system needs to detect the intermediate frequency (IF) corresponding to the best detonating distance. This paper puts forward a method of Goertzel algorithm applied to the LFMCW laser fuze ranging system. By numerical simulation and comparison with the FFT algorithm we can see that the method applied to the LFMCW laser fuze ranging system can effectively achieves the detection of the difference frequency which contains distance information, and has good characters of real-time detection and easy project realization. The results show that the method applied to LFMCW laser fuze ranging system is reasonable and feasible.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115722232","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270563
Pengfei Wang, M. Ding, G. Brambilla, Y. Semenova, Qiang Wu, G. Farrell
The application of microfibre couplers in a comb-filter-based ratiometric wavelength measurement system is discussed. The fabrication of microfibre coupler is presented and its temperature-dependent performance is investigated. The resolution of the ratiometric wavelength measurement system with a microfiber coupler is significantly improved in comparison with a conventional ratiometric system to better than 4 pm maintaining the potential for high measurement speed and wide measurable wavelength range.
{"title":"Resolution Improvement of a Ratiometric Wavelength Measurement System by Using an Optical Microfibre Coupler","authors":"Pengfei Wang, M. Ding, G. Brambilla, Y. Semenova, Qiang Wu, G. Farrell","doi":"10.1109/SOPO.2012.6270563","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270563","url":null,"abstract":"The application of microfibre couplers in a comb-filter-based ratiometric wavelength measurement system is discussed. The fabrication of microfibre coupler is presented and its temperature-dependent performance is investigated. The resolution of the ratiometric wavelength measurement system with a microfiber coupler is significantly improved in comparison with a conventional ratiometric system to better than 4 pm maintaining the potential for high measurement speed and wide measurable wavelength range.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114695969","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270438
Xiqu Chen, Jie Li, Y. Hu, M. Li
In this paper, the physical thermal model for a typical optical switch based on VO2 thin film is built, according to which the response time parameter expression of the optical switch is obtained in theory. The expression of the response time parameter reveals key factors relevant to the switching speed of optical switch based on VO2 thin film and theoretically gives directions to improve the switching speed of this kind of optical switch. Furthermore, the proposed measurement means of response time parameter can be utilized to practical measure and test on optical switch.
{"title":"Theoretical Analysis and Experimental Measurement on the Response Time of Optical Switch Based on VO2 Thin Film","authors":"Xiqu Chen, Jie Li, Y. Hu, M. Li","doi":"10.1109/SOPO.2012.6270438","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270438","url":null,"abstract":"In this paper, the physical thermal model for a typical optical switch based on VO2 thin film is built, according to which the response time parameter expression of the optical switch is obtained in theory. The expression of the response time parameter reveals key factors relevant to the switching speed of optical switch based on VO2 thin film and theoretically gives directions to improve the switching speed of this kind of optical switch. Furthermore, the proposed measurement means of response time parameter can be utilized to practical measure and test on optical switch.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117331229","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 : 2012-05-21DOI: 10.1109/SOPO.2012.6270547
Changhai Deng, X. Wan, Zhi-min Zhang, Jiakun Zhao, Jianhua Ye, Qi Chen, P. Huang, Wei Yu
Numerical modeling of high temperature pressure pipes including delaminations were constructed using ANSYS, then heat flux and convection are loaded on the outside surface. The influence of pulse excitation parameters, depth of defects, thickness of defects, length of defects on maximum thermal contrast and time for maximum thermal contrast are analysised. Length of defects are measured by using the methed of full width at half maximum .According to the research result, it is known that the maximum thermal contrast increased linearly with the product of excitation time and heat flux. It increases also as the defect gets thicker and less deeper, but will not increase always as the length of defects increase. As to the time for maximum thermal contrast, it appears more later with longer excitation time, deeper and thicker defects, however, which has nothing to do with the heat flux. Full wide at half maximum is a good method to measure the length of defects for its small error.
{"title":"Numerical Modelling and Analysis of Infrared Testing in Delaminations of Pressurepipes Using ANSYS","authors":"Changhai Deng, X. Wan, Zhi-min Zhang, Jiakun Zhao, Jianhua Ye, Qi Chen, P. Huang, Wei Yu","doi":"10.1109/SOPO.2012.6270547","DOIUrl":"https://doi.org/10.1109/SOPO.2012.6270547","url":null,"abstract":"Numerical modeling of high temperature pressure pipes including delaminations were constructed using ANSYS, then heat flux and convection are loaded on the outside surface. The influence of pulse excitation parameters, depth of defects, thickness of defects, length of defects on maximum thermal contrast and time for maximum thermal contrast are analysised. Length of defects are measured by using the methed of full width at half maximum .According to the research result, it is known that the maximum thermal contrast increased linearly with the product of excitation time and heat flux. It increases also as the defect gets thicker and less deeper, but will not increase always as the length of defects increase. As to the time for maximum thermal contrast, it appears more later with longer excitation time, deeper and thicker defects, however, which has nothing to do with the heat flux. Full wide at half maximum is a good method to measure the length of defects for its small error.","PeriodicalId":159850,"journal":{"name":"2012 Symposium on Photonics and Optoelectronics","volume":"659 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116096404","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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