Optical Review最新文献_第4页

Underwater image enhancement via adaptive white-balancing and multi-restoration image fusion 基于自适应白平衡和多重恢复图像融合的水下图像增强

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-28 DOI: 10.1007/s10043-024-00941-0

Genping Zhao, Yuanhao Xiao, Canheng Huang, Zhuowei Wang, Heng Wu

{"title":"Underwater image enhancement via adaptive white-balancing and multi-restoration image fusion","authors":"Genping Zhao, Yuanhao Xiao, Canheng Huang, Zhuowei Wang, Heng Wu","doi":"10.1007/s10043-024-00941-0","DOIUrl":"https://doi.org/10.1007/s10043-024-00941-0","url":null,"abstract":"Underwater images often suffer from color shift and visual blur due to light absorption and scattering in the water medium. An adaptive image enhancement method is proposed for underwater image quality improvement. First, adaptive color compensation is proposed based on the color features of the image, and selectively apply the gray world assumption according to the degree of color unevenness. Second, we use the color correction result combined with a rough estimation of ambient light and medium transmission map to restore the brightness and contrast of the underwater image. Next, based on different ambient light estimation values, we obtain multiple restoration results with different local features. Finally, we introduce the well-known multi-scale fusion strategy, using gradient matrix as weight, to fuse multiple restoration results. Extensive experiments on natural and synthetic underwater image datasets show that our method is robust in underwater image enhancement to achieve color, high contrast, moderate brightness in various complex underwater environments. Moreover, its effectiveness is also verified in the applications of underwater image saliency detection and natural image enhancement.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"2 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monitoring of size and dynamics of thrombus in artificial blood flow using laser speckle image analysis 用激光散斑图像分析监测人工血流中血栓的大小和动态

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-27 DOI: 10.1007/s10043-024-00938-9

Naomichi Yokoi, Yoshihisa Aizu

{"title":"Monitoring of size and dynamics of thrombus in artificial blood flow using laser speckle image analysis","authors":"Naomichi Yokoi, Yoshihisa Aizu","doi":"10.1007/s10043-024-00938-9","DOIUrl":"https://doi.org/10.1007/s10043-024-00938-9","url":null,"abstract":"The formation of thrombus in blood may be a cause of thrombosis which induces symptoms, such as myocardial infarction, cerebral infarction, and economy class syndrome. Recently, investigations on blood flows inside artificial blood vessel and artificial organ have been performed energetically for clinical application. Thus, in vitro monitoring of thrombogenesis in blood flow inside them is thought to be essential to optimize their function for stable blood perfusion in such as artificial dialysis system and blood transfusion system. In the present study, we propose a method for monitoring the size and dynamics of thrombus in artificial blood flow using speckle patterns obtained under the illumination of coherent light. We experimentally discuss the spatial and temporal variation information on speckle patterns in relation to the size and dynamics of thrombus, respectively, under illumination of a laser diode. The above information contributes to the quantification of degree of thrombogenesis. Experimental results show the feasibility of the present method for in vitro monitoring of the formation of thrombus in artificial blood flow.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"5 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation on temperature rise using ring-resonator-type device for heat-assisted magnetic recording 使用环形谐振器型器件进行热辅助磁记录的温升模拟

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-16 DOI: 10.1007/s10043-024-00939-8

Ryuichi Katayama, Satoshi Sugiura

{"title":"Simulation on temperature rise using ring-resonator-type device for heat-assisted magnetic recording","authors":"Ryuichi Katayama, Satoshi Sugiura","doi":"10.1007/s10043-024-00939-8","DOIUrl":"https://doi.org/10.1007/s10043-024-00939-8","url":null,"abstract":"Heat-assisted magnetic recording (HAMR) is a promising technology for improving the recording density of hard disk drives. A near-field transducer (NFT), which forms a small light spot on a recording medium, is necessary in HAMR. The authors’ group previously proposed a novel device, in which a metal nano-antenna acting as an NFT is attached to a semiconductor ring resonator acting as a light source via a dielectric spacer. In this study, the temperature rise including the recording medium using this device was analyzed through the combination of optical and thermal simulations. To reduce the temperature rise of the nano-antenna while heating the recording layer to the Curie temperature, the following two methods were used: first, the nano-antenna length and the spacer thickness were optimized. Second, a heat spreader, which surrounds the nano-antenna, was introduced. The nano-antenna was made of Au, and the spacer and heat spreader were made of SiO2. When the peak temperature of the recording layer was 800 K, the temperature of the nano-antenna was 3350 K without the above methods, but it was significantly reduced to 400 K with the above methods. This is a sufficiently low value to keep the hardness of the nano-antenna. On the other hand, the thermal spot size in the recording layer was slightly increased from 62 × 64 nm2 to 67 × 72 nm2 by the above methods.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"82 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Viewing zone of aerial hollow face illusion evoked by use a 3D object as a light source for AIRR optical system 利用三维物体作为AIRR光学系统光源所产生的空中空脸错觉的视区

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-07 DOI: 10.1007/s10043-024-00937-w

Takumi Watanabe, Hiroki Takatsuka, Shiro Suyama, Hirotsugu Yamamoto

引用次数: 0

High-speed blood flow measurement based on a continuous laser-assisted nonlinear photoacoustic 基于连续激光辅助非线性光声的高速血流测量

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-06 DOI: 10.1007/s10043-024-00935-y

Ziyi Ke, Qixin Liu, Minglong Hu, Junjie Zhou, Shilin Ren, Yingchun Ding, Liang Yin

{"title":"High-speed blood flow measurement based on a continuous laser-assisted nonlinear photoacoustic","authors":"Ziyi Ke, Qixin Liu, Minglong Hu, Junjie Zhou, Shilin Ren, Yingchun Ding, Liang Yin","doi":"10.1007/s10043-024-00935-y","DOIUrl":"https://doi.org/10.1007/s10043-024-00935-y","url":null,"abstract":"Nonlinear photoacoustic-based methods for measuring high-speed blood flow velocity typically use a single-pulse laser or a dual-pulse laser system with high repetition rate to achieve thermal tagging and acoustic excitation at the same time. However, the peak power of the pulsed laser is too high and can easily exceed the damage threshold, causing the blood to be overheated, which limits the application of this method in living tissue. In this paper, we propose and confirm a method of detecting high-speed blood flow with a low-power continuous laser-assisted nonlinear photoacoustic. We first establish a model of the relationship between the attenuation of Gruneisen parameters and velocity. Based on this, we further develop a theoretical relationship between the change of photoacoustic signal and the blood velocity. Then we used a low-power continuous laser for thermal tagging and a low repetition rate of pulsed laser to excite photoacoustic signals in the experiment. After calibration, the results show that the velocity measured by this method is in good agreement with the actual velocity and the highest flow velocity can be measured was 100 mm/s under our experimental conditions.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"27 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A microring resonator full-duplex 5 × 5 optical routing switch based on ITO material 一种基于ITO材料的微环谐振器全双工5x5光路由开关

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-04 DOI: 10.1007/s10043-024-00931-2

Yunying Shi, Peng Tang, Jiaqi Zhao, Zhixun Liang, Cong Hu

引用次数: 0

An efficient evaluation model of fusion splice with different transverse offset and angular misalignment for few mode fiber 一种具有不同横向偏移和角度不对准的低模光纤熔接的有效评价模型

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-11-30 DOI: 10.1007/s10043-024-00929-w

Feng Liu, Zhicheng Huang, Tianle Gu, Ping Wu

{"title":"An efficient evaluation model of fusion splice with different transverse offset and angular misalignment for few mode fiber","authors":"Feng Liu, Zhicheng Huang, Tianle Gu, Ping Wu","doi":"10.1007/s10043-024-00929-w","DOIUrl":"https://doi.org/10.1007/s10043-024-00929-w","url":null,"abstract":"In this paper, based on a scale-adapted set of Laguerre-Gaussian modes, a theoretical model has been presented for evaluating the coupling efficiency of modes and mode crosstalk between different spatial modes caused by transverse offset and angular misalignments. A proof-of-model demonstration is performed for three-mode fiber, and the results show that the coupling efficiency and mode crosstalk of various modes behaves differently in the presence of axial offset and the direction of the misalignment. And it is also demonstrated that the proposed scheme can be scalable to analyze the FMFs with a large number of modes. On the basis of this model, the tolerance of coupling efficiency to the fusion splice conditions with different FMF parameter is analyzed. The results show that the larger the FMF normalized frequency V, the smaller the tolerance of spatial mode coupling to the transverse offset value. With the increase of V value, the tolerance of self-coupling efficiency and mode crosstalk to angular misalignments changes regularly. Therefore, the transverse offset and angular misalignments of fusion splice with different FMF parameters need to be strictly controlled to achieve suitable mode coupling efficiency and mode crosstalk.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"11 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142753774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: Effect of MoS2 and (phosphorene, germanene, borophene) hybrid structure on the performance of an SPR biosensor for detection of bacteria 修正：二硫化钼与（磷烯、锗烯、硼烯）杂化结构对细菌检测用SPR生物传感器性能的影响

IF 1.1 4区物理与天体物理

Optical Review Pub Date : 2024-11-24 DOI: 10.1007/s10043-024-00933-0

Mohammad Hadi Shahrokh Abadi, Amir Davami

引用次数: 0

Fundamental evaluation of the pseudo-3D perception of 2D aerial virtual images 二维航空虚拟图像的伪三维感知基础评估

IF 1.1 4区物理与天体物理

Optical Review Pub Date : 2024-11-20 DOI: 10.1007/s10043-024-00930-3

Kenta Saito, Haruki Mizushina, Kenji Yamamoto

引用次数: 0

Hue-preserving image enhancement for the elderly based on wavelength-dependent gamma correction 基于波长伽马校正的老年人图像色调保护增强技术