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A joint study of deep learning-based methods for identity document image binarization and its influence on attribute recognition 基于深度学习的身份证件图像二值化方法及其对属性识别的影响研究
Computer Optics Pub Date : 2023-08-01 DOI: 10.18287/2412-6179-co-1207
R. Sánchez-Rivero, P.V. Bezmaternykh, A.V. Gayer, A. Morales-González, F. José Silva-Mata, K.B. Bulatov
{"title":"A joint study of deep learning-based methods for identity document image binarization and its influence on attribute recognition","authors":"R. Sánchez-Rivero, P.V. Bezmaternykh, A.V. Gayer, A. Morales-González, F. José Silva-Mata, K.B. Bulatov","doi":"10.18287/2412-6179-co-1207","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1207","url":null,"abstract":"Text recognition has benefited considerably from deep learning research, as well as the preprocessing methods included in its workflow. Identity documents are critical in the field of document analysis and should be thoroughly researched in relation to this workflow. We propose to examine the link between deep learning-based binarization and recognition algorithms for this sort of documents on the MIDV-500 and MIDV-2020 datasets. We provide a series of experiments to illustrate the relation between the quality of the collected images with respect to the binarization results, as well as the influence of its output on final recognition performance. We show that deep learning-based binarization solutions are affected by the capture quality, which implies that they still need significant improvements. We also show that proper binarization results can improve the performance for many recognition methods. Our retrained U-Net-bin outperformed all other binarization methods, and the best result in recognition was obtained by Paddle Paddle OCR v2.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134998063","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
Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers 基于热弹性效应的光声光纤超声换能器及光纤干涉接收机的研究现状
Computer Optics Pub Date : 2023-08-01 DOI: 10.18287/2412-6179-co-1224
A.P. Mikitchuk, E.I. Girshova, V.V. Nikolaev
{"title":"Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers","authors":"A.P. Mikitchuk, E.I. Girshova, V.V. Nikolaev","doi":"10.18287/2412-6179-co-1224","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1224","url":null,"abstract":"The work is devoted to an overview of the current state of optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interference receivers, its scope, technologies and materials used, the advantages and disadvantages of different methods and the prospects for the development of the industry.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134998065","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
Third-order aberration analysis of a Fresnel lens 菲涅耳透镜的三阶像差分析
Computer Optics Pub Date : 2023-08-01 DOI: 10.18287/2412-6179-co-1276
G.E. Romanova, N.S. Nguyen
{"title":"Third-order aberration analysis of a Fresnel lens","authors":"G.E. Romanova, N.S. Nguyen","doi":"10.18287/2412-6179-co-1276","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1276","url":null,"abstract":"This paper presents expressions for the third-order aberrations of a Fresnel surface (Seidel coefficients). The formulas are derived in a form that allows analytical aberration analysis to be performed at the stage of layout and preliminary design of a system composed of both classical and Fresnel surfaces. In addition to the five major monochromatic Seidel aberrations of the classical surfaces and the line coma which was described for the Fresnel-type surfaces, another aberration, called quadratic astigmatism, is described in this paper. Although the obtained expressions are an approximation for the third-order aberration domain, i.e. higher-order aberrations are ignored, they provide sufficient accuracy in practice, which is also shown in the paper. The derived expressions can be applied to the analysis of aberrations in schemes using a Fresnel lens, which makes it possible to identify the areas of rational use of elements of this type.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134998066","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
Geometric-optical model of a multimode Hermite-Gaussian beam 多模厄米-高斯光束的几何光学模型
Computer Optics Pub Date : 2023-08-01 DOI: 10.18287/2412-6179-co-1239
R.E. Ilinsky
{"title":"Geometric-optical model of a multimode Hermite-Gaussian beam","authors":"R.E. Ilinsky","doi":"10.18287/2412-6179-co-1239","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1239","url":null,"abstract":"A mathematical model of the spatial distribution of the radiation flux in a multimode Hermite-Gaussian beam is proposed. In this model, the spatial distribution of the radiation flux is described by rays with radiation fluxes strung on them. A feature of the proposed model is that the radiation fluxes strung on the beams are added algebraically.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134997848","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
Surface roughness influence on photonic nanojet parameters of dielectric microspheres 表面粗糙度对介电微球光子纳米射流参数的影响
Computer Optics Pub Date : 2023-08-01 DOI: 10.18287/2412-6179-co-1280
Y.E. Geints, None E.K. Panina
{"title":"Surface roughness influence on photonic nanojet parameters of dielectric microspheres","authors":"Y.E. Geints, None E.K. Panina","doi":"10.18287/2412-6179-co-1280","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1280","url":null,"abstract":"All naturally found and technologically fabricated solid microparticles possess surface roughness. Upon optical wave scattering from such particles, in addition to its geometric shape, the surface relief becomes an important morphological factor determining the optical properties of the scatterer. We present results of the numerical 3D-simulations of focusing an optical wave with a dielectric microsphere with randomly distributed surface roughness. We address different cases of azimuthally symmetric and asymmetric distortions of the particle surface. We show that the key parameters of the near-field focal region (intensity, longitudinal and transverse dimensions) referred to as a photonic nanojet (PNJ) are sensitive to changes in the microsphere surface texture. Two important PNJ parameters, the peak intensity and the longitudinal length, are subject to more prominent changes. The influence of the optical contrast (relative refractive index) of the microsphere on PNJ parameters is investigated in detail. The possibility of reducing the influence of surface roughness on the near-field focusing strength by microsphere watering (water-uptake) is demonstrated.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134998064","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
Agricultural plant hyperspectral imaging dataset 农业植物高光谱成像数据集
IF 1
Computer Optics Pub Date : 2023-06-01 DOI: 10.18287/2412-6179-co-1226
A. Gaidel, V. Podlipnov, N. A. Ivliev, R. Paringer, P. Ishkin, S. Mashkov, R. Skidanov
{"title":"Agricultural plant hyperspectral imaging dataset","authors":"A. Gaidel, V. Podlipnov, N. A. Ivliev, R. Paringer, P. Ishkin, S. Mashkov, R. Skidanov","doi":"10.18287/2412-6179-co-1226","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1226","url":null,"abstract":"Detailed automated analysis of crop images is critical to the development of smart agriculture and can significantly improve the quantity and quality of agricultural products. A hyperspectral camera potentially allows to extract more information about the observed object than a conventional one, so its use can help in solving problems that are difficult to solve with conventional methods. Often, predictive models that solve such problems require a large dataset for training. However, sufficiently large datasets of hyperspectral images of agricultural plants are not currently publicly available. Therefore, we present a new dataset of hyperspectral images of plants in this paper. This dataset can be accessed via URL https://pypi.org/project/HSI-Dataset-API/. It contains 385 hyperspectral images with a spatial resolution of 512 by 512 pixels and spectral resolution of 237 spectral bands. The images were captured in the summer of 2021 in Samara and Novocherkassk (Russia) using Offner based Imaging Hyperspectrometer of our own production. The article demonstrates the work of some basic approaches to the analysis of hyperspectral images using the dataset and states problems for further solving.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76100992","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
Modeling mental peculiarities of a decision maker by a Fourier-holography technique 用傅立叶全息技术模拟决策者的心理特征
IF 1
Computer Optics Pub Date : 2023-06-01 DOI: 10.18287/2412-6179-co-1189
A. Pavlov, A.O. Gaugel
{"title":"Modeling mental peculiarities of a decision maker by a Fourier-holography technique","authors":"A. Pavlov, A.O. Gaugel","doi":"10.18287/2412-6179-co-1189","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1189","url":null,"abstract":"A task of modeling individual mental features of a decision-maker using a Fourier holography setup is considered. The problem is considered for a situation when current conditions of decision-making contradict to the previously learned rule of decision-making logic modeled by the non-cooperative game \"Prisoner's Dilemma\". The approach to the problem is based on a hypothesis of the correlation between mental features and the properties of the neural network as a material carrier of intelligence. The 6f Fourier holography scheme of the resonant architecture is considered as a three-layer neural network implementing a neuro-physiologically motivated concept of the \"excitation ring\" proposed by A.M. Ivanitsky. We analytically assess the dependence of the validity limits of the classical total probability formula for a disjunction of incompatible events on the characteristics of low-frequency filters in holograms and the correlation radii of the training image of the basic decision rule. Analytical results are confirmed by results of the numerical simulation.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83686735","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
Super-resolution microscopy based on wide spectrum denoising and compressed sensing 基于广谱去噪和压缩感知的超分辨率显微技术
IF 1
Computer Optics Pub Date : 2023-06-01 DOI: 10.18287/2412-6179-co-1172
T. Cheng, H. Jin
{"title":"Super-resolution microscopy based on wide spectrum denoising and compressed sensing","authors":"T. Cheng, H. Jin","doi":"10.18287/2412-6179-co-1172","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1172","url":null,"abstract":"WSD can effectively remove random noise of a raw image from very low density to ultra-high density fluorescent molecular distribution scenarios. The size of the raw image that WSD can denoise is subject to the used measurement matrix. A large raw image must be divided into blocks so that WSD denoises each block separately. Based on traditional single-molecule localization and super-resolution reconstruction scenarios, wide spectrum denoising (WSD) for blocks of different sizes was studied. The denoising ability is related to block sizes. The general trend is when the block gets larger, the denoising effect gets worse. When the block size is equal to 10, the denoising effect is the best. Using compressed sensing, only 20 raw images are needed for reconstruction. The temporal resolution is less than half a second. The spatial resolution is also greatly improved.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78194025","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
Minimal focal spot obtained by focusing circularly polarized light 通过聚焦圆偏振光获得的最小焦斑
IF 1
Computer Optics Pub Date : 2023-06-01 DOI: 10.18287/2412-6179-co-1247
S. Stafeev, V. D. Zaitcev, V. Kotlyar
{"title":"Minimal focal spot obtained by focusing circularly polarized light","authors":"S. Stafeev, V. D. Zaitcev, V. Kotlyar","doi":"10.18287/2412-6179-co-1247","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1247","url":null,"abstract":"In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to grow. The minimum focal spot is observed at NA=0.96 (FWHM=0.55λ). With a further increase in the numerical aperture of the lens, the growth of the longitudinal component leads to an increase in the size of the focal spot. When the flat diffractive lens is replaced by an aplanatic lens, the size of the focal spot decreases monotonically as the numerical aperture of the lens increases.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80177277","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
On classification of Sentinel-2 satellite images by a neural network ResNet-50 基于神经网络ResNet-50的Sentinel-2卫星图像分类研究
IF 1
Computer Optics Pub Date : 2023-06-01 DOI: 10.18287/2412-6179-co-1216
I. Bychkov, G. M. Ruzhnikov, R. Fedorov, A. K. Popova, Y. V. Avramenko
{"title":"On classification of Sentinel-2 satellite images by a neural network ResNet-50","authors":"I. Bychkov, G. M. Ruzhnikov, R. Fedorov, A. K. Popova, Y. V. Avramenko","doi":"10.18287/2412-6179-co-1216","DOIUrl":"https://doi.org/10.18287/2412-6179-co-1216","url":null,"abstract":"Various combinations of neural network parameters and sets of input data for satellite image classification are considered in the article. The training set is completed with a NDVI (normalized difference vegetation index) and local binary patterns. Testing of classifiers created on a different number of epochs and samples is carried out. Values of the neural network hyperparameters are determined that allow a classification accuracy of 0.70 and an F-measure of 0.65 to be achieved. Separation into classes with similar spectral characteristics is shown to offer low classification quality at different parameters and input data sets. Additional information is required. For example, for forests to be divided into more detailed classes, one needs to employ classifiers that use images from different seasons and vegetation periods. In addition, the training set needs to be extended to take into account various natural zones, soils, etc.","PeriodicalId":46692,"journal":{"name":"Computer Optics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86902367","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
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