发布求助
文献互助 智能选刊 最新文献

The International Commission for Optics最新文献

筛选
英文 中文
Comparative analysis of directional filtering techniques in fringe patterns 条纹图中定向滤波技术的比较分析
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.903379
N. Escalante, J. Villa, I. de la Rosa, E. Gonzalez-Ramirez, M. Araiza
{"title":"Comparative analysis of directional filtering techniques in fringe patterns","authors":"N. Escalante, J. Villa, I. de la Rosa, E. Gonzalez-Ramirez, M. Araiza","doi":"10.1117/12.903379","DOIUrl":"https://doi.org/10.1117/12.903379","url":null,"abstract":"We present a comparison of some methodologies that exist for directional filtering of fringe patterns. An important task in fringe image processing is the noise filtering. The implementation of linear filters is not always a proper procedure in the presence of high density fringes because the signal and noise are mixed in Fourier space. The objective of this report is to carry out a comparison of existing procedures to determine which of them provides a better image estimation. The techniques considered in this work are: Regularized Filters (RQCF), Oriented spatial filter masks (OSFM), Second-Order Oriented partial differential equations (SOPDE) and Directional filters (DF). To compare these techniques, we analyze their performance for different noise levels, using synthetic fringe images.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115748821","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
Relationship between reflection spectra of breast adipose tissue with histologic grade 乳腺脂肪组织反射光谱与组织学分级的关系
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.902167
Aarón Muñoz Morales, S. Vázquez y Montiel, A. Reigosa
{"title":"Relationship between reflection spectra of breast adipose tissue with histologic grade","authors":"Aarón Muñoz Morales, S. Vázquez y Montiel, A. Reigosa","doi":"10.1117/12.902167","DOIUrl":"https://doi.org/10.1117/12.902167","url":null,"abstract":"Optical spectroscopy allows the characterization, recognition and differentiation of subcutaneous tissues healthy and no-healthy, to facilitate the diagnosis or early detection for breast cancer are studied white adipose tissue by the subcutaneous region with the help of the diffuse reflection spectroscopy in the visible areas (400 to 700 nm) of electromagnetic spectrum for them using a spectrometer portable of integrating sphere, Hunter lab Model Mini-Scan. The problem to be solved for cancer detection by optical techniques is to find the solution to the inverse problem of scattering of radiation in tissue where it is necessary to solve the equation of energy transfer. us through the trigonometric interpolation and by the data adjustment by least squares using Fourier series expansion to parameterize the spectral response curves of each sample of breast adipose tissue then correlated with histological grades established by the optical biopsy for each one of the samples, allowing use this technique to the study of anomalies in White Adipose Tissue Breast, changes are evident in the spectral response for Breast Adipose Tissue carcinogens with respect to healthy tissues and for the different histological grades.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114697265","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
Formation of parabolic optical pulses in passive optical fibers 无源光纤中抛物型光脉冲的形成
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.901822
I. Sukhoivanov, S. Iakushev, O. Shulika, I. Guryev, J. A. Andrade Lucio, O. I. Ibarra Manzano
{"title":"Formation of parabolic optical pulses in passive optical fibers","authors":"I. Sukhoivanov, S. Iakushev, O. Shulika, I. Guryev, J. A. Andrade Lucio, O. I. Ibarra Manzano","doi":"10.1117/12.901822","DOIUrl":"https://doi.org/10.1117/12.901822","url":null,"abstract":"We have investigated a nonlinear pulse reshaping towards parabolic pulses in the passive normal dispersive optical fibers. We have found that pulses with parabolic intensity profile, parabolic spectrum and linear chirp can be obtained due to the passive nonlinear reshaping at the propagation distance exceeding a few dispersion lengths. These pulses preserve parabolic profile during subsequent pulse propagation in a fiber. We have examined the influence of initial pulse parameters and fiber parameters on the resulted pulse shape.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134584901","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: 5
Speckle contrast measurement with low light levels and imperfect laser illumination 低光照和不完全激光照明下的散斑对比度测量
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.902323
J. Goodman, Yiping Feng, Robert Aymeric
{"title":"Speckle contrast measurement with low light levels and imperfect laser illumination","authors":"J. Goodman, Yiping Feng, Robert Aymeric","doi":"10.1117/12.902323","DOIUrl":"https://doi.org/10.1117/12.902323","url":null,"abstract":"The contrast of a speckle pattern, defined as the ratio of the standard deviation of intensity to the mean intensity, is an important parameter that can yield useful information in vibration analysis, and surface roughness measurement. It is also of inherent interest in the measurement of scattering by coherent X-rays. Under some circumstances, the light levels at which contrast measurements must be made are low, and the measurement of speckle fluctuations is complicated by the presence of noise associated with discrete detected photoevents. In addition, the measurements are made over a finite integration time and a finite integration area, so it is the contrast of the integrated intensity that is of interest. The goal of this paper is to explore the effects of both photoevent noise and source fluctuations on the measurement of speckle contrast. Thus in themost general case, there are three sources of randomness, source fluctuations, random scattering and photoevent fluctuations. Partial motivation for the investigation is understanding the photoevent statistics and speckle count contrast for synchrotron and fee-electron laser sources.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132047509","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
Invariant correlation by using vectorial signatures and spectral index 利用矢量签名和谱指数的不变性相关
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.901995
Claudia Fimbres-Castro, J. Álvarez-Borrego, M. A. Bueno-Ibarra
{"title":"Invariant correlation by using vectorial signatures and spectral index","authors":"Claudia Fimbres-Castro, J. Álvarez-Borrego, M. A. Bueno-Ibarra","doi":"10.1117/12.901995","DOIUrl":"https://doi.org/10.1117/12.901995","url":null,"abstract":"In this paper a non-linear correlation methodology to recognize objects is used. This new system is invariant to position, rotation and scale. This digital system has a low computational cost to achieve a significant reduction of processed information by using vectorial signatures. The invariant vectorial signatures are obtained from the information from both the target image as well as problem image. In this way, each image has its rotational and scale vectorial signature obtained through several mathematical transformations such as scale and Fourier transform. So, this method uses the great capacities from the non-linear filters to discriminate between similar objects. Vectorial signatures are compared using non-linear correlation. The result of this comparison is shown in a bi-dimensional plane where the x axis is the result of the rotation correlation and the y axis is the result of the scale correlation. In addition, spectral index and vectorial signature index are obtained through several mathematical transformations in order to recognize the objects in a more simple way. 21 different fossil diatoms images were used. The results obtained are analyzed and discussed.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129727835","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
Optical properties and their variations at Co-Ni-B amorphous metallic alloys Co-Ni-B非晶金属合金的光学性质及其变化
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.901936
D. Manko, L. Poperenko, V. Kravets
{"title":"Optical properties and their variations at Co-Ni-B amorphous metallic alloys","authors":"D. Manko, L. Poperenko, V. Kravets","doi":"10.1117/12.901936","DOIUrl":"https://doi.org/10.1117/12.901936","url":null,"abstract":"It is well known that optical phenomena in metals at IR spectral region are connected with intraband optical transitions and they are analogues of direct electrical conductivity (resistance) at low frequencies. It can be suggested that in case of alternating current flux through an amorphous metallic ribbon in external magnetic field, correlation between optical and magneto-transport properties can be emerged. It must be important that the objects of the investigations are magneto-optical effects linked with diagonal components of the optical tensor unlike Kerr or Faraday effects. Experimental appearance of magneto-optical effects comprises significant changes of optical conductivity and real part of dielectric permeability via influence of external magnetic field. The magneto-transport properties depend on the effective differential permeability, on the type of domain structure and corresponding densities of electron states at the Fermi level. Optical functions of the amorphous metallic alloys ribbons of Co-Ni-B are obtained at spectral region of 1.0-5.0 eV. Changes of optical conductivity spectra of the ribbons' surface in the presence of applied external magnetic field are revealed. Variations of optical and magneto-transport properties caused by superseding of one 3d transition metal (Co) to another (Ni) are obtained. Parameters of electronic subsystem were calculated. Interconnection between electronic structure of the amorphous metallic ribbons' surface and its magneto-transport properties is established.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122678724","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
Cross-talk analysis in arterial hemoglobin oxygen saturation measurements 动脉血红蛋白氧饱和度测量中的串扰分析
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.903390
C. Vazquez-Jaccaud, G. Páez, M. Strojnik, G. Moreno-Gonzalez-Teran
{"title":"Cross-talk analysis in arterial hemoglobin oxygen saturation measurements","authors":"C. Vazquez-Jaccaud, G. Páez, M. Strojnik, G. Moreno-Gonzalez-Teran","doi":"10.1117/12.903390","DOIUrl":"https://doi.org/10.1117/12.903390","url":null,"abstract":"Previously, we analyzed the classical theory for oxygen saturation in blood. We proposed a novel model to reduce noise effects, and a methodology based on standard deviation oxygen saturation maps to select the optimal wavelength zones to improve oximetry measurements. We evaluate the oxygen saturation measurement for different wavelength pairs in the spectral range from 650 to 1050 nm looking for accurate saturation values. We perform a cross-talk analysis in hemoglobin absorbance spectra in order to find out the optimum center wavelength for light sources of extended spectrum like a led. We compare the oxygen saturation results obtained with different peak wavelengths considering the cross-talk effect between oxy- and deoxy-hemoglobin signals.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125368435","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
Tangential and sagittal curvature from the normals computed by the null screen method in corneal topography 在角膜地形图中，由零屏法计算的法线的切向和矢状曲率
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.903417
Amilcar Estrada-Molina, R. Díaz-Uribe
{"title":"Tangential and sagittal curvature from the normals computed by the null screen method in corneal topography","authors":"Amilcar Estrada-Molina, R. Díaz-Uribe","doi":"10.1117/12.903417","DOIUrl":"https://doi.org/10.1117/12.903417","url":null,"abstract":"A new method for computing the tangential and sagittal curvatures from the normals to a cornea is proposed. The normals are obtained through a Null Screen method from the coordinates of the drops shaped spots at the null screen, the coordinates on a reference approximating surface and the centroids on the image plane. This method assumes that the cornea has rotational symmetry and our derivations will be carried out in the meridional plane that contains the symmetry axis. Experimental results are shown for a calibration spherical surface, using cylindrical null screens with radial point arrays.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123711716","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
Gray-level image reconstruction using Bessel-Fourier moments 利用贝塞尔-傅里叶矩进行灰度级图像重建
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.903391
C. Toxqui-Quitl, L. Gutiérrez-Lazcano, A. Padilla-Vivanco, C. Camacho-Bello
{"title":"Gray-level image reconstruction using Bessel-Fourier moments","authors":"C. Toxqui-Quitl, L. Gutiérrez-Lazcano, A. Padilla-Vivanco, C. Camacho-Bello","doi":"10.1117/12.903391","DOIUrl":"https://doi.org/10.1117/12.903391","url":null,"abstract":"In this work, we reconstruct discrete image functions by means Bessel-Fourier polynomials. To measure the image reconstruction we use the Normalized image reconstruction error between the input and reconstructed images. We show that, a good reconstruction performance is found to be available for gray-level images. The reconstruction algorithm is implemented using the first forty zeros of the Bessel functions of the first kind. Experimental results are presented.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133134340","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
Analysis of cantilever beam test using digital holography 悬臂梁试验的数字全息分析
The International Commission for Optics Pub Date : 2011-11-02 DOI: 10.1117/12.901925
G. N. de Oliveira, L. Nunes, P. A. D. dos Santos
{"title":"Analysis of cantilever beam test using digital holography","authors":"G. N. de Oliveira, L. Nunes, P. A. D. dos Santos","doi":"10.1117/12.901925","DOIUrl":"https://doi.org/10.1117/12.901925","url":null,"abstract":"In the present work an interferometric approach based on the implementation of a digital holography setup is discussed. It is used to determine interferograms of materials under small deformations. In order to do this, a fixed-free cantilever beam subjected to a concentrated force applied at the free end is taken into account. The experimental procedure to estimate displacements is carried out using digital Fourier transform holography (DFTH) technique. This is obtained making a very simple modification in the classical setup architecture of the DFTH setup. It is also demonstrated the easy and practical viability of the setup in an interferometric application for mechanical parameters determination.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133629981","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书