Computer Optics最新文献_第9页

Changing the trajectory of Airy beam sets with spatial carriers 利用空间载波改变艾里光束集的轨迹

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1139

A. Frolov, А.V. Ustinov, S. Khonina

引用次数: 1

Formation of high-order cylindrical vector beams with sector sandwich structures 扇形夹层结构高阶圆柱矢量梁的形成

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1096

S. Karpeev, V. Podlipnov, S. Degtyarev, A. Algubili

引用次数: 1

Coherent superposition of the Laguerre-Gaussian beams with different wavelengths: colored optical vortices 不同波长拉盖尔-高斯光束的相干叠加:彩色光学漩涡

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1106

V. Kotlyar, A. Kovalev, A. Savelyeva

引用次数: 3

High-performance digital image filtering architectures in the residue number system based on the Winograd method 基于Winograd方法的剩余数系统中高性能数字图像滤波架构

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-933

M. Valueva, P. Lyakhov, N. Nagornov, G. Valuev

引用次数: 1

Open-set face identification with automatic detection of out-of-distribution images 开集人脸识别与自动检测非分布图像

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1061

A. Sokolova, A. Savchenko, Nikolenko

引用次数: 5

Inhomogeneously polarized light fields: polarization singularity indices derived by analogy with the topological charge 非均匀偏振光场:由拓扑电荷类比导出的偏振奇异指数

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1126

V. Kotlyar, A. Kovalev, V. Zaitsev

{"title":"Inhomogeneously polarized light fields: polarization singularity indices derived by analogy with the topological charge","authors":"V. Kotlyar, A. Kovalev, V. Zaitsev","doi":"10.18287/2412-6179-co-1126","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1126","url":null,"abstract":"In this work, we study several different vector and hybrid light fields, including those with multiple polarization singularities. We derive polarization singularity indices by adopting a well-known M.V. Berry's formula, which is commonly used to obtain the topological charge of scalar vortex light fields. It is shown that fields whose polarization state depends only on the polar angle in the beam cross section can have either polarization singularity lines outgoing from the center, or a single polarization singularity in the center of the beam cross section. If the polarization state of the field depends only on the radial variable, then such fields have no polarization singularities and their index is equal to zero. If the polarization state of a vector field depends on both polar coordinates, then such a field can have several polarization singularities at different locations in the beam cross section. We also investigate a vector field with high-order radial polarization and with a real parameter. At different values of this parameter, such a field has either several polarization singularity lines outgoing from the center, or a single singular point in the center. The polarization singularity index of such a field for different parameters can be either half-integer, or integer, or zero.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":"11 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87812153","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

Techniques of sampling the energy characteristics of two-dimensional random signals 二维随机信号能量特性的采样技术

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1074

V. Syuzev, A. V. Proletarsky, D. Mikov, I. Deykin

{"title":"Techniques of sampling the energy characteristics of two-dimensional random signals","authors":"V. Syuzev, A. V. Proletarsky, D. Mikov, I. Deykin","doi":"10.18287/2412-6179-co-1074","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1074","url":null,"abstract":"The article is devoted to methods of discretization of energy characteristics of two-dimensional random signals when simulating random signals using the original harmonic method, which is a generalization of the well-known algorithm proposed by V. S. Pugachev for the two-dimensional case. Requirements imposed on the sampling method are aimed at reducing the computational complexity of the simulation method and increasing its flexibility thanks to removing restrictions on the form of autocorrelation functions and spectral energy density functions. The use of the simulation error as a criterion for quality assessment is proposed. The discretization method is considered for signals given both on unlimited definition intervals and on limited ones. The article demonstrates results of the software system implementation in which the original simulation method is realized using the described sampling methods in both cases. The proposed technique is shown to be robust and efficient, with the results obtained being of independent scientific and technical value and showing promise for developing new effective spectral techniques of simulating signals for the use in intelligent decision support systems.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":"27 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79440097","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

Development of software for the segmentation of text areas in real-scene images 实景图像文本区域分割软件的开发

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1047

V. A. Lobanova, Yuliya Ivanova

引用次数: 0

Experimental study of a matrix method of equal-weight columns correcting ability to protect data from erasure 等权重列校正保护数据不被擦除的矩阵方法的实验研究

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1122

Е.E. Aydarkin, N. Mogilevskaya

引用次数: 0

An automatic method for subpixel registration of KMSS-M imagery based on coarse-resolution actualized reference 基于粗分辨率实际参考的KMSS-M图像亚像素自动配准方法

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Computer Optics Pub Date : 2022-10-01 DOI: 10.18287/2412-6179-co-1098

D. Plotnikov, P. Kolbudaev, E. Loupian

{"title":"An automatic method for subpixel registration of KMSS-M imagery based on coarse-resolution actualized reference","authors":"D. Plotnikov, P. Kolbudaev, E. Loupian","doi":"10.18287/2412-6179-co-1098","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1098","url":null,"abstract":"The paper describes a method for automatic subpixel-accurate geographic referencing of imagery acquired by KMSS-M with 60 m spatial resolution, based on leveraging a coarse, reconstructed, cloud-free and daily updated MODIS surface reflectance reference image. The method is based on maximizing Pearson's correlation value when determining an optimal local displacement of the distorted image fragment by comparing with the reference image. To assess the effectiveness of the method when used over continental-scale and heterogeneous areas, three experiments were carried out providing quantitative estimates of imagery registration errors: an experiment with model datasets, an experiment to estimate the absolute registration error of MODIS reference imagery, and an experiment to estimate the registration error of geocorrected KMSS-M data. Experimental evaluation of the method based on model datasets of decameter-resolution Sentinel-2 (MSI) imagery demonstrated its robustness when used over a variety of environmental conditions over a one year-long observation period. The average georeferencing error of MODIS coarse-resolution reference was shown to be less than 20 meters in Red and Near-infrared bands. Corrected KMSS-M imagery evaluation over the Russian Grain Belt within 2020 has shown, on average, the subpixel referencing accuracy both in Red and Near-infrared bands, while the average absolute georeferencing error of the original uncorrected KMSS-M imagery was shown to be about 3 kilometers. Subpixel registration accuracy of KMSS-M imagery, corrected with MODIS-based coarse-resolution reference, opens new prospects for using multi-temporal analysis of this multispectral surface reflectance data in a variety of scientific and practical applications associated with vegetation cover satellite monitoring. The technological flexibility of the method ensures its applicability to data from other satellite systems for Earth optical remote sensing.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":"40 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81137519","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