检索结果-内蒙古大学图书馆

SPIE 12th International Symposium on Multispectral Image Processing and pattern recognition, MIPPR 2023

作者： Li, Zezheng Xiang, Guoliang Shu, Ting Yang, Mingjuan Hua, Xia Hubei Key Laboratory of Optical Information and Pattern Recognition School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan430205 China Wuhan Raycus Fiber Laser Technologies Co. Ltd Wuhan430075 China

ISBN: (数字)9781510674967

ISBN: (纸本)9781510674950

The applications of multi-scale fusion strategy to feature are very effective and common in image restoration. However, there is a lack of research on the application of the multi-scale fusion strategy to attention mechanism, although attention mechanism has also been verified to be effective in image restoration. To address this problem, we propose a residual multi-scale pixel attention fusion block (RMPAFB) to refine the input feature, which successfully combine the multi-scale fusion strategy with pixel attention. RMPAFB can capture feature correspondences from multi-scale pixel attention map, which can be more effective for feature refinement than single-scale pixel attention map. Based on RMPAFB, we build an efficient and effective network called RMPAFNet for image deblurring. Substantial experiments on several benchmark datasets have showed that multi-scale pixel attention performs better than single-scale pixel attention and our proposed RMPAFNet achieves state-of-The-Art performance while requiring fewer overheads than recent competing deblurring models. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Pixels

来源：评论

学校读者我要写书评

暂无评论

Measurement of molecular alignment with deep learningbased M-XFROG technique [Invited]

引用

Chinese Optics Letters 2023年第12期21卷 19-24页

作者：陶皖辰孙思琦何立新何炎凊胡建昌邓宇徐诚清兰鹏飞陆培祥 Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205China

We demonstrate a deep-learning neural network(DNN) method for the measurement of molecular alignment by using the molecular-alignment-based cross-correlation polarization-gating frequency resolved optical gating(M-XFROG) *** network has the capacity for direct measurement of molecular alignment from the FROG traces. In a proof-of-principle experiment, we have demonstrated our method in O^(2) molecules. With our method, the molecular alignment factor(t) of O_(2), impulsively excited by a pump pulse, was directly reconstructed. The accuracy and validity of the reconstruction have been verified by comparison with the simulations based on experimental parameters.

关键词： molecular alignment deep-learning neural network M-XFROG

来源：评论

学校读者我要写书评

暂无评论

Temporal Airy–Talbot effect in linear optical potentials

引用

Chinese Optics Letters 2021年第8期19卷 105-110页

作者： Tianwen Han Hao Chen Wenwan Li Bing Wang Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205China

We investigate the Airy–Talbot effect of an Airy pulse train in time-dependent linear *** parabolic trajectory of self-imaging depends on both the dispersion sign and the linear potential *** imposing linear phase modulations on the pulse train,the Airy–Talbot effects accompanied with positive and negative refractions are *** an input composed of stationary Airy pulses,the self-imaging follows straight lines,and the Airy–Talbot distance can be engineered by varying the linear potential *** effect is also achieved in symmetric linear *** study provides opportunities to control the self-imaging of aperiodic optical fields in time dimension.

关键词： Airy pulse Talbot and self-imaging effect dispersion linear potential

来源：评论

学校读者我要写书评

暂无评论

Generation of six-lobe photoelectron angular distribution via three-leaf clover laser field

引用

optical and Quantum Electronics 2024年第11期56卷 1-11页

作者： Xu, Shengliang Huang, Liang Zhang, Xiaodong Kuang, Jidi Hong, Zuofei Wang, Run GAC Automotive Research & amp Development Center Guangzhou China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan China College of Physics and Electronic Information Engineering Zhejiang Normal University Jinhua China

We theoretically investigate the low-energy photoelectron angular distribution (PAD) during ionization of the P± atomic orbitals by counter-rotating two-color circularly polarized laser fields. Our study reveals a transition from three-lobe to six-lobe structure in the low-energy PAD for P+ orbital when the intensity ratio between the co-rotating 800-nm (ω0) and counter-rotating 400-nm (2ω0) laser components is increased, while the three-lobe structure is maintained for the P- orbital. The three-lobe structure is exclusively attributed to the (6×2ω0-1×ω0) pathway, whereas the (5×2ω0+1×ω0) pathway begins to dominate for the six-lobe structure. These results clearly and unambiguously demonstrate that the PAD in counter-rotating laser fields can be utilized for the detection of P+ and P- orbitals and also offer additional degrees of freedom for precisely controlling the contributions of various ionization pathways. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

关键词： Angular distribution

来源：评论

学校读者我要写书评

暂无评论

A novel multiscale recursive recognition method for flying airplane objects

A novel multiscale recursive recognition method for flying a...

引用

2012 International Conference on Image Processing, Computer Vision, and pattern recognition, IPCV 2012

作者： Zhang, Tianxu Zhou, Gang Yang, Ying Weng, Wenjie Sun, Xiangdong Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology State Key Laboratory for Multispectral Information Processing Technologies Wuhan Hubei China

ISBN: (纸本)9781601322258

In actual imaging process, the projection or silhouette of a three-dimensional moving object is variable in shape, scale and resolution to make its recognizability also unstable. A remedy is suggested on concepts defined in this paper as the dynamic feature space of the pattern. The necessity of developing feature models of multi-scale characteristic view for three-dimensional moving airplane objects and the rationality of using a usual constraint on airplane object moving characteristics are discussed. Thus, a novel multi-scale intelligent recursive recognizing (MUSIRR) method for image sequences is proposed. An intelligent recognizer composed of hybrid neural networks and logic decision-making modules is constructed with the BP neural networks and RBF networks as the building blocks of the recognizer. The rationality and effectiveness of the new method proposed in this paper have been verified by results of massive simulation and actual experiments on several types of airplane object.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Resolving and weighing the quantum orbits in strong-field tunneling ionization

引用

Advanced Photonics 2021年第3期3卷 67-72页

作者： Jia Tan Shengliang Xu Xu Han Yueming Zhou Min Li Wei Cao Qingbin Zhang Peixiang Lu Huazhong University of Science and Technology School of Physics and Wuhan National Laboratory for OptoelectronicsWuhanChina Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern RecognitionWuhanChina

Tunneling ionization of atoms and molecules induced by intense laser pulses contains the contributions of numerous quantum *** the contributions of these orbits is crucial for exploring the application of tunneling and for understanding various tunneling-triggered strong-field *** perform a combined experimental and theoretical study to identify the relative contributions of the quantum orbits corresponding to the electrons tunneling ionized during the adjacent rising and falling quarter cycles of the electric field of the laser *** our scheme,a perturbative second-harmonic field is added to the fundamental driving *** analyzing the relative phase dependence of the signal in the photoelectron momentum distribution,the relative contributions of these two orbits are unambiguously *** results show that their relative contributions sensitively depend on the longitudinal momentum and modulate with the transverse momentum of the photoelectron,which is attributed to the interference of the electron wave packets of the long *** relative contributions of these orbits resolved here are important for the application of strong-field tunneling ionization as a photoelectron spectroscopy for attosecond time-resolved measurements.

关键词： tunneling ionization quantum orbits photoelectron holography attosecond electron dynamics

来源：评论

学校读者我要写书评

暂无评论

Controllable transitions among phase-matching conditions in a single nonlinear crystal

引用

Chinese Optics Letters 2024年第2期22卷 141-147页

作者：曾梓琦尤世欣杨子祥袁晨智由成龙金锐博 Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205China Quantum Photonics Laboratory Department of Physics and AstronomyLouisiana State UniversityBaton RougeLouisiana 70803USA

Entangled photon pairs are crucial resources for quantum information processing *** the process of spontaneous parametric downconversion(SPDC),we can generate these photon pairs using bulk nonlinear ***,the crystal is designed to satisfy a specific type of phase-matching ***,we report controllable transitions among different types of phase matching in a single periodically poled potassium titanyl phosphate *** carefully selecting pump conditions,we can satisfy different phase-matching *** allows us to observe first-order Type-II,fifth-order Type-I,third-order Type-0,and fifth-order Type-II *** temperature-dependent spectra of our source were also analyzed in ***,we discussed the possibility of observing more than nine SPDCs in this *** work not only deepens the understanding of the physics behind phase-matching conditions,but also offers the potential for a highly versatile entangled biphoton source for quantum information research.

关键词： spontaneous parametric downconversion nonlinear crystals phase-matching condition

来源：评论

学校读者我要写书评

暂无评论

Ship detection in polarimetric SAR based on support vector machine

引用

Research Journal of Applied Sciences, Engineering and Technology 2012年第16期4卷 2844-2850页

作者： Su, Xuwu Yang, Guangyou Sang, Hongshi State Key Laboratory for Multi-spectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 China School of Mechanical Engineering Hubei University of Science and Technology Wuhan 430068 China

A Support Vector Machine (SVM) based method for ship detection in Polarimetric SAR (POLSAR) is proposed in this study. Because of similarities of ship and man-made structures on land in scattering mechanisms, land and sea are first segmented by SVM according to polarimetric features and texture features;The SVM-based Recursive Feature Elimination (RFE-SVM) approach is adopted to improve the performance of the segmentation algorithm. Then ship targets are extracted from sea by SVM classifier;Threshold-based rules and SVM-based rules are established for discriminating ship from non-ship target at last. The experiments are carried out on POLSAR data from Radarsat-2. For the available SAR images, the average accuracy of ship detection is over 95%. © Maxwell Scientific Organization, 2012.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

The optical-flow aided navigation for the INS

The optical-flow aided navigation for the INS

引用

MIPPR 2009 - Automatic Target recognition and Image Analysis: 6th International Symposium on Multispectral Image Processing and pattern recognition

作者： Pan, Chao Liu, Jianguo Xiao, Wei State Key Laboratory for Multispectral Information Processing Technologies Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan Hubei 430074 China

ISBN: (纸本)9780819478061

The inertial navigation system (INS) is an efficient navigation method but it can occur accumulative errors. To correct this error in the INS, this paper presents a novel optical-flow aided navigation method by studying the terrain aided navigation, which can implement the continuous error estimation of the INS by employing the extended kalman filter that regards optical-flow as its measurement parameter. Therefore, this aided method is similar to the terrain aided navigation except that the measurement parameter and equation are both derived from optical-flow instead of terrain height. Experiments with some actual aerial image sequences have proven the efficiency of this aided navigation method. © 2009 Copyright SPIE - The International Society for optical Engineering.

关键词： Kalman filters

来源：评论

学校读者我要写书评

暂无评论

Global systolic array for fast computation of 3-D moment invariants

Global systolic array for fast computation of 3-D moment inv...

引用

MIPPR 2009 - Medical Imaging, Parallel Processing of Images, and Optimization Techniques: 6th International Symposium on Multispectral Image Processing and pattern recognition

作者： Liu, J.G. Chen, Shaobo Wang, Hai State Key Laboratory for Multispectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology WuHan HuBei 430074 China

ISBN: (纸本)9780819478085

The 3-D moment invariants are introduced to solve the problem of recognition of 3-D objects independent of size, position, and orientation. In this paper, based on our previous systolic array for fast computation of 3-D moment, we propose a new global systolic array for fast computation of 3-D moment invariants. The systolic sarray mostly consists of adders with area complexity O(n) and are highly regular and structurally very simple, resulting in simple hardware implementation. The method is suitable for both binary images and gray level images and is also suitable for image sequence moments. © 2009 Copyright SPIE - The International Society for optical Engineering.

关键词： Systolic arrays

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：