Journal of The Optical Society of America A-optics Image Science and Vision最新文献_第10页

Image dehazing algorithm based on optimized dark channel and haze-line priors of adaptive sky segmentation. 基于优化暗通道和雾线先验自适应天空分割的图像去雾算法。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.484423

Guangmang Cui, Qiong Ma, Jufeng Zhao, Shunjie Yang, Ziyi Chen

{"title":"Image dehazing algorithm based on optimized dark channel and haze-line priors of adaptive sky segmentation.","authors":"Guangmang Cui, Qiong Ma, Jufeng Zhao, Shunjie Yang, Ziyi Chen","doi":"10.1364/JOSAA.484423","DOIUrl":"https://doi.org/10.1364/JOSAA.484423","url":null,"abstract":"When dealing with outdoor hazy images, traditional image dehazing algorithms are often affected by the sky regions, resulting in appearing color distortions and detail loss in the restored image. Therefore, we proposed an optimized dark channel and haze-line priors method based on adaptive sky segmentation to improve the quality of dehazed images including sky areas. The proposed algorithm segmented the sky region of a hazy image by using the Gaussian fitting curve and prior information of sky color rules to calculate the adaptive threshold. Then, an optimized dark channel prior method was used to obtain the light distribution image of the sky region, and the haze-line prior method was utilized to calculate the transmission of the foreground region. Finally, a minimization function was designed to optimize the transmission, and the dehazed images were restored with the atmospheric scattering model. Experimental results demonstrated that the presented dehazing framework could preserve more details of the sky area as well as restore the color constancy of the image with better visual effects. Compared with other algorithms, the results of the proposed algorithm could achieve higher peak signal-to-noise ratio (PSNR) and structural similarity index (SSIM) evaluation values and provide the restored image with subjective visual effects closer to the real scene.","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10598701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimal trade-off filters for compressed Raman classification and spectrum reconstruction. 压缩拉曼分类和光谱重建的最佳权衡滤波器。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.479569

Timothée Justel, Frédéric Galland, Antoine Roueff

引用次数: 0

Three-dimensional contrast-transfer-function approach in phase-contrast tomography. 相衬断层扫描中的三维对比传递函数方法。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.494293

Darren A Thompson, Yakov I Nesterets, Konstantin M Pavlov, Timur E Gureyev

{"title":"Three-dimensional contrast-transfer-function approach in phase-contrast tomography.","authors":"Darren A Thompson, Yakov I Nesterets, Konstantin M Pavlov, Timur E Gureyev","doi":"10.1364/JOSAA.494293","DOIUrl":"https://doi.org/10.1364/JOSAA.494293","url":null,"abstract":"A new method is developed for 3D reconstruction of multimaterial objects using propagation-based x-ray phase-contrast tomography (PB-CT) with phase retrieval via contrast-transfer-function (CTF) formalism. The approach differs from conventional PB-CT algorithms, which apply phase retrieval to individual 2D projections. Instead, this method involves performing phase retrieval to the CT-reconstructed volume in 3D. The CTF formalism is further extended to the cases of partially coherent illumination and strongly absorbing samples. Simulated results demonstrate that the proposed post-reconstruction CTF method provides fast and stable phase retrieval, producing results equivalent to conventional pre-reconstruction 2D CTF phase retrieval. Moreover, it is shown that application can be highly localized to isolated objects of interest, without a significant loss of quality, thus leading to increased computational efficiency. Combined with the extended validity of the CTF to greater propagation distances, this method provides additional advantages over approaches based on the transport-of-intensity equation.","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10580901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Equivalence between radial quadrature and finite series for spherical wave expansion of Bessel beams. 贝塞尔梁球面波展开的径向正交与有限级数的等价性。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.491597

Jianxin Lin, Shiliang Zhong, Jianqi Shen

引用次数: 1

Single-shot extended field of view imaging using point spread function engineering. 单镜头扩展视场成像的点扩展函数工程。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.484734

Ritika Malik, Kedar Khare

{"title":"Single-shot extended field of view imaging using point spread function engineering.","authors":"Ritika Malik, Kedar Khare","doi":"10.1364/JOSAA.484734","DOIUrl":"https://doi.org/10.1364/JOSAA.484734","url":null,"abstract":"We present a single-shot computational imaging system employing pupil phase engineering to extend the field of view (FOV) beyond the physical sensor limit. Our approach uses a point spread function in the form of a multiple-point impulse response (MPIR). Unlike the traditional point-to-point imaging model used by most traditional optical imaging systems, the proposed MPIR model can collect information from within and outside the sensor boundary. The detected raw image despite being scrambled can be decoded via a sparse optimization algorithm to get extended FOV imaging performance. We provide a thorough analysis of MPIR design regarding the number of impulses and their spatial extent. Increasing the number of impulses in MPIR of a given spatial extent leads to better information gathering within the detector region; however, it also reduces contrast in the raw data. Therefore, a trade-off between increasing the information and keeping adequate contrast in the detected data is necessary to achieve high-quality reconstruction. We first illustrate this trade-off with a simulation study and present experimental results on a suitably designed extended FOV imaging system. We demonstrate reconstructed images with a 4× gain in pixels over the native detection area without loss of spatial resolution. The proposed system design considerations are generic and can be applied to various imaging systems for extended FOV performance.","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10232091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Transport model for the propagation of partially coherent, partially polarized, polarization-gradient vector beams. 部分相干、部分极化、偏振梯度矢量光束传播的输运模型。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.489045

J M Nichols, D V Nickel, G K Rohde, F Bucholtz

{"title":"Transport model for the propagation of partially coherent, partially polarized, polarization-gradient vector beams.","authors":"J M Nichols, D V Nickel, G K Rohde, F Bucholtz","doi":"10.1364/JOSAA.489045","DOIUrl":"https://doi.org/10.1364/JOSAA.489045","url":null,"abstract":"Recently we predicted and experimentally validated a new physical mechanism for altering the propagation path of a monochromatic beam [Opt. Express30, 38907 (2022)OPEXFF1094-408710.1364/OE.467678]. Specifically, we showed that by properly tailoring the spatial distribution of the linear state of polarization transverse to the direction of propagation, the beam followed a curved trajectory in free space. Here we extend the model to the partially coherent and partially polarized polychromatic case by redefining the beam amplitude, phase, and polarization angle as appropriate statistical quantities. In particular, the definition of polarization angle represents a fundamentally new quantity in modeling beam propagation and is shown to be consistent with recent works on energy and momentum flow. In the new model, the beam curvature matches that of our previous work in the fully coherent case but is predicted to vanish for an unpolarized, spatially incoherent beam. Simulated beam trajectories are shown for varying levels of initial partial coherence and for different polarization profiles. A new class of non-diffracting beams is also suggested by way of example.","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10232525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Star map matching method for optical circular rotation imaging based on graph neural networks. 基于图神经网络的光学旋转成像星图匹配方法。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.486401

Tingting Xu, Xiubin Yang, Zongqiang Fu, Ge Jin, Wei Chen, Miaoran Huang, Guoyu Lu

引用次数: 0

Increasing the power and spectral efficiencies of an OFDM-based VLC system through multi-objective optimization. 通过多目标优化提高基于ofdm的VLC系统的功率和频谱效率。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.482525

Wesley Costa, Higor Camporez, Maria Pontes, Marcelo Segatto, Helder Rocha, Jair Silva, Malte Hinrichs, Anagnostis Paraskevopoulos, Volker Jungnickel, Ronald Freund

{"title":"Increasing the power and spectral efficiencies of an OFDM-based VLC system through multi-objective optimization.","authors":"Wesley Costa, Higor Camporez, Maria Pontes, Marcelo Segatto, Helder Rocha, Jair Silva, Malte Hinrichs, Anagnostis Paraskevopoulos, Volker Jungnickel, Ronald Freund","doi":"10.1364/JOSAA.482525","DOIUrl":"https://doi.org/10.1364/JOSAA.482525","url":null,"abstract":"The nonlinearity induced by light-emitting diodes in visible light communication (VLC) systems presents a challenge to the parametrization of orthogonal frequency division multiplexing (OFDM). The goal of the multi-objective optimization problem presented in this study is to maximize the transmitted power (superimposed LED bias-current and signal amplification) for both conventional and constant envelope (CE) OFDM while also maximizing spectral efficiency. The bit error rate (BER) metric is used to evaluate the optimization using the non-dominated sorting genetic algorithm II. Simulation results show that for a BER of 1×10-3, the signal-to-noise ratio (SNR) required decreases with the guard band due to intermodulation distortions. In contrast to SNR values of approximately 13 and 25 dB achieved by traditional OFDM-based systems, the VLC system with CE signals achieves a guard band of 6% of the signal bandwidth with required SNR values of approximately 10.8 and 24 dB for 4-quadrature amplitude modulation (QAM) and 16-QAM modulation orders, respectively.","PeriodicalId":17382,"journal":{"name":"Journal of The Optical Society of America A-optics Image Science and Vision","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10286766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Implementing a non-4f relay system for Hartmann-Shack wavefront sensing. 实现哈特曼-夏克波前传感的非4f继电器系统。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.470047

Charlie Börjeson, Dmitry Romashchenko, Peter Unsbo, Linda Lundström

引用次数: 0

Generation of optical vortex lattices by in-line phase modulation with partially coherent light. 部分相干光在线相位调制产生光学涡旋晶格。

IF 1.9 3区物理与天体物理

Journal of The Optical Society of America A-optics Image Science and Vision Pub Date : 2023-06-01 DOI: 10.1364/JOSAA.489469

Allarakha Shikder, Naveen K Nishchal

引用次数: 1