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Advances in Optical Technologies最新文献

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In Search of Early Time: An Original Approach in the Thermographic Identification of Thermophysical Properties and Defects 寻找早期:热物理性质和缺陷的热成像识别的一种新颖方法
Advances in Optical Technologies Pub Date : 2013-02-17 DOI: 10.1155/2013/314906
D. Balageas
{"title":"In Search of Early Time: An Original Approach in the Thermographic Identification of Thermophysical Properties and Defects","authors":"D. Balageas","doi":"10.1155/2013/314906","DOIUrl":"https://doi.org/10.1155/2013/314906","url":null,"abstract":"Active thermography gives the possibility to characterize thermophysical properties and defects in complex structures presenting heterogeneities. The produced thermal fields can be rapidly 3D. On the other hand, due to the size of modern thermographic images, pixel-wise data processing based on 1D models is the only reasonable approach for a rapid image processing. The only way to conciliate these two constraints when dealing with time-resolved experiments lies in the earlier possible detection/characterization. This approach is illustrated by several different applications and compared to more classical methods, demonstrating that simplicity of models and calculations is compatible with efficient and accurate identifications.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132866670","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: 25
Nonlocal Mean Image Denoising Using Anisotropic Structure Tensor 基于各向异性结构张量的非局部均值图像去噪
Advances in Optical Technologies Pub Date : 2013-02-12 DOI: 10.1155/2013/794728
Xi Wu, Xi Wu, Mingyuan Xie, Wei Wu, Jiliu Zhou
{"title":"Nonlocal Mean Image Denoising Using Anisotropic Structure Tensor","authors":"Xi Wu, Xi Wu, Mingyuan Xie, Wei Wu, Jiliu Zhou","doi":"10.1155/2013/794728","DOIUrl":"https://doi.org/10.1155/2013/794728","url":null,"abstract":"We present a novel nonlocal mean (NLM) algorithm using an anisotropic structure tensor to achieve higher accuracy of imaging denoising and better preservation of fine image details. Instead of using the intensity to identify the pixel, the proposed algorithm uses the structure tensor to characterize the boundary information around the pixel more comprehensively. Meanwhile, similarity of the structure tensor is computed in a Riemannian space for more rigorous comparison, and the similarity weight of the pixel (or patch) is determined by the intensity and structure tensor simultaneously. The proposed algorithm is compared with the original NLM algorithm and a modified NLM algorithm that is based on the principle component analysis. Quantitative and qualitative comparisons of the three NLM algorithms are presented as well.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132913817","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: 9
Experimental Investigation of an Index-Mismatched Multiphase Flow Using Optical Techniques 折射率不匹配多相流的光学实验研究
Advances in Optical Technologies Pub Date : 2013-02-12 DOI: 10.1155/2013/487121
H. Diaz, R. Hugo
{"title":"Experimental Investigation of an Index-Mismatched Multiphase Flow Using Optical Techniques","authors":"H. Diaz, R. Hugo","doi":"10.1155/2013/487121","DOIUrl":"https://doi.org/10.1155/2013/487121","url":null,"abstract":"An experimental investigation of multiphase flow involving a liquid (water) and a gas (air) is performed. The results for three different scenarios are presented: fixed bubble, ascending bubble, and dispersed-bubble turbulent pipe flow. This study involves a comparison of statistical data collected using two sensing systems, a wavefront sensor and a high-speed video camera. A signal analysis technique based on signal attenuation is developed for data collected using the wavefront sensor. The three experiments performed provide experimental evidence that the Shack-Hartmann wavefront sensor, operating on signal attenuation, is a viable method for the study of multiphase bubble flows.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120935772","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
Properties of the Band Gaps in 1D Ternary Lossy Photonic Crystal Containing Double-Negative Materials 含双负材料的一维三元损耗光子晶体带隙性质
Advances in Optical Technologies Pub Date : 2013-01-20 DOI: 10.1155/2014/129568
A. Aghajamali, M. Akbarimoosavi, M. Barati
{"title":"Properties of the Band Gaps in 1D Ternary Lossy Photonic Crystal Containing Double-Negative Materials","authors":"A. Aghajamali, M. Akbarimoosavi, M. Barati","doi":"10.1155/2014/129568","DOIUrl":"https://doi.org/10.1155/2014/129568","url":null,"abstract":"Theoretically, the characteristics matrix method is employed to investigate and compare the properties of the band gaps of the one-dimensional ternary and binary lossy photonic crystals which are composed of double-negative and double-positive materials. This study shows that by varying the angle of incidence, the band gaps for TM and TE waves behave differently in both ternary and binary lossy structures. The results demonstrate that, by increasing the angle of incidence for the TE wave, the width and the depth of zero-, zero-, and Bragg gap increase in both ternary and binary structures. On the other hand, the enhancement of the angle of incidence for the TM wave contributes to reduction of the width and the depth of the zero- and Bragg gaps, and they finally disappear for incidence angles greater than 50° and 60° for the binary structure and 40° and 45° for the ternary structures, respectively. In addition, the details of the edges of the band gaps variations as a function of incidence angle for both structures are studied.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123076978","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: 11
End-to-End Image Simulator for Optical Imaging Systems: Equations and Simulation Examples 光学成像系统的端到端图像模拟器:方程和仿真示例
Advances in Optical Technologies Pub Date : 2013-01-15 DOI: 10.1155/2013/295950
P. Coppo, L. Chiarantini, L. Alparone
{"title":"End-to-End Image Simulator for Optical Imaging Systems: Equations and Simulation Examples","authors":"P. Coppo, L. Chiarantini, L. Alparone","doi":"10.1155/2013/295950","DOIUrl":"https://doi.org/10.1155/2013/295950","url":null,"abstract":"The theoretical description of a simplified end-to-end software tool for simulation of data produced by optical instruments, starting from either synthetic or airborne hyperspectral data, is described and some simulation examples of hyperspectral and panchromatic images for existing and future design instruments are also reported. High spatial/spectral resolution images with low intrinsic noise and the sensor/mission specifications are used as inputs for the simulations. The examples reported in this paper show the capabilities of the tool for simulating target detection scenarios, data quality assessment with respect to classification performance and class discrimination, impact of optical design on image quality, and 3D modelling of optical performances. The simulator is conceived as a tool (during phase 0/A) for the specification and early development of new Earth observation optical instruments, whose compliance to user’s requirements is achieved through a process of cost/performance trade-off. The Selex Galileo simulator, as compared with other existing image simulators for phase C/D projects of space-borne instruments, implements all modules necessary for a complete panchromatic and hyper spectral image simulation, and it allows excellent flexibility and expandability for new integrated functions because of the adopted IDL-ENVI software environment.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115886935","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: 20
Heat Diffusion in Klinker Facade: The Study Case of a Gio Ponti Building Klinker立面的热扩散:Gio Ponti建筑的研究案例
Advances in Optical Technologies Pub Date : 2012-12-30 DOI: 10.1155/2012/738943
N. Ludwig, E. Rosina, S. Caglio, M. Gargano, V. Redaelli
{"title":"Heat Diffusion in Klinker Facade: The Study Case of a Gio Ponti Building","authors":"N. Ludwig, E. Rosina, S. Caglio, M. Gargano, V. Redaelli","doi":"10.1155/2012/738943","DOIUrl":"https://doi.org/10.1155/2012/738943","url":null,"abstract":"The researchers focus on the IRT procedure of heat diffusion in ceramic finishing materials of contemporary architecture. The aim of the research is the development of a method for the thermal characterization of clinkers, a very common ceramic finishing material of buildings. The first experimental phase was performed in laboratory on clinkers of different shapes, thickness, colors, and glazing surface. The researchers determined two characteristic parameters related to thickness and thermal conductivity, by the interpolation of the heating curve in function of time with an analytical curve (resulted from a particular solution of Fourier’s equation). This curve allows to obtain a parameter characteristic of the material of the specimens under investigation. At present time, the researchers have been studying the correlation between this parameter and the damage level in the specimens; they will be testing the model on real-scale study cases in the second experimental phase.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130277060","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
Micro-Scale Thermal Imaging of Organic and Polymeric Materials with Cooled and Uncooled Infrared Cameras 用冷却和非冷却红外相机研究有机和聚合物材料的微尺度热成像
Advances in Optical Technologies Pub Date : 2012-12-13 DOI: 10.1155/2012/484650
J. Morikawa, E. Hayakawa, T. Hashimoto
{"title":"Micro-Scale Thermal Imaging of Organic and Polymeric Materials with Cooled and Uncooled Infrared Cameras","authors":"J. Morikawa, E. Hayakawa, T. Hashimoto","doi":"10.1155/2012/484650","DOIUrl":"https://doi.org/10.1155/2012/484650","url":null,"abstract":"The emissivity corrected thermal imaging combined with a real-time direct imposed-signal system on the freezing of biological cells is presented, which makes it possible to visualize the exothermic latent heat at a minus temperature. The applicability of the uncooled micro bolometer (thermal detector) to the micro-scale thermal analysis on the phase transitions of organic and polymeric materials is discussed in comparison with the photon detector, equipped with the optics originally designed.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927755","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: 12
Emissivity Measurement of Semitransparent Textiles 半透明纺织品的发射率测量
Advances in Optical Technologies Pub Date : 2012-12-10 DOI: 10.1155/2012/373926
P. Bison, A. Bortolin, G. Cadelano, G. Ferrarini, E. Grinzato
{"title":"Emissivity Measurement of Semitransparent Textiles","authors":"P. Bison, A. Bortolin, G. Cadelano, G. Ferrarini, E. Grinzato","doi":"10.1155/2012/373926","DOIUrl":"https://doi.org/10.1155/2012/373926","url":null,"abstract":"In the textiles production industry it is more and more common to advertise new textiles, especially for sportswear, by claiming their ability to emit IR radiation in the long wave band at a higher degree with respect to normal clothes, that is highly beneficial to improve sporting performances. Three textiles are compared, one normal and two “special,” with Ag","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121838217","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
Infrared Camera Analysis of Laser Hardening 激光硬化的红外摄像机分析
Advances in Optical Technologies Pub Date : 2012-12-09 DOI: 10.1155/2012/593893
J. Tesař, P. Vacíková, O. Soukup, Š. Houdková
{"title":"Infrared Camera Analysis of Laser Hardening","authors":"J. Tesař, P. Vacíková, O. Soukup, Š. Houdková","doi":"10.1155/2012/593893","DOIUrl":"https://doi.org/10.1155/2012/593893","url":null,"abstract":"The improvement of surface properties such as laser hardening becomes very important in present manufacturing. Resulting laser hardening depth and surface hardness can be affected by changes in optical properties of material surface, that is, by absorptivity that gives the ratio between absorbed energy and incident laser energy. The surface changes on tested sample of steel block were made by engraving laser with different scanning velocity and repetition frequency. During the laser hardening the process was observed by infrared (IR) camera system that measures infrared radiation from the heated sample and depicts it in a form of temperature field. The images from the IR camera of the sample are shown, and maximal temperatures of all engraved areas are evaluated and compared. The surface hardness was measured, and the hardening depth was estimated from the measured hardness profile in the sample cross-section. The correlation between reached temperature, surface hardness, and hardening depth is shown. The highest and the lowest temperatures correspond to the lowest/highest hardness and the highest/lowest hardening depth.","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130608279","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
Infrared: A Key Technology for Security Systems 红外:安防系统的关键技术
Advances in Optical Technologies Pub Date : 2012-12-04 DOI: 10.1007/978-1-4614-3860-1_6
C. Corsi
{"title":"Infrared: A Key Technology for Security Systems","authors":"C. Corsi","doi":"10.1007/978-1-4614-3860-1_6","DOIUrl":"https://doi.org/10.1007/978-1-4614-3860-1_6","url":null,"abstract":"","PeriodicalId":156432,"journal":{"name":"Advances in Optical Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123943382","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: 28
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