检索结果-内蒙古大学图书馆

end-to-end optimization of Metalens for Broadband and Wide-Angle Imaging

ADVANCED OPTICAL MATERIALS 2025年第9期13卷

作者： Park, Yeongmyeong Kim, Youngjin Kim, Changhyun Lee, Gun-Yeal Choi, Hyeongyu Choi, Taewon Jeong, Yoonchan Lee, Byoungho Seoul Natl Univ Dept Elect & Comp Engn 1 Gwanak Ro Seoul 08826 South Korea Korea Inst Sci & Technol Ctr Quantum Technol Hwarang Ro 14 Gil 5 Seoul 02792 South Korea Stanford Univ Dept Elect Engn 350 Jane Stanford Way Stanford CA 94305 USA

end-to-end optimization of metalens and artificial intelligence-driven image restoration algorithms has recently emerged as a powerful tool for realizing ultra-compact imaging systems. However, the limited imaging quality of existing approaches remains challenging in meeting the demand for commercial devices due to the severe aberrations exhibited by metalens. These results in highly blurred sensor images, creating substantial challenges for accurate image restoration. In this work, a novel meta-imager is introduced that overcomes this challenge by employing an aperture-stop-integrated metalens and co-designing it with a computational image restoration network using a fully differentiable optimization framework. The proposed imager physically consists of a single metalens and an aperture stop located on the opposite side of the 1 mm-thick glass substrate. This configuration effectively alleviates off-axis aberrations such as coma and astigmatism, facilitating the image restoration process of the deep neural networks. The experimental results present that this scheme features 70 degrees field-of-view, for full-color imaging across the entire visible spectrum. It is believed that this work represents a significant advancement in creating ultra-compact cameras using nanophotonics.

关键词： end-to-end optimization metalens metasurfaces nanophotonics

来源：评论

学校读者我要写书评

暂无评论

end-to-end optimization of Source Models for Speech and Audio Coding Using a Machine Learning Framework 20

End-to-end Optimization of Source Models for Speech and Audi...

引用

Interspeech Conference

作者： Backstrom, Tom Aalto Univ Dept Signal Proc & Acoust Espoo Finland

Speech coding is the most commonly used application of speech processing. Accumulated layers of improvements have however made codecs so complex that optimization of individual modules becomes increasingly difficult. This work introduces machine learning methodology to speech and audio coding, such that we can optimize quality in terms of overall entropy. We can then use conventional quantization, coding and perceptual models without modification such that the codec adheres to conventional requirements on algorithmic complexity, latency and robustness to packet loss. Experiments demonstrate that end-to-end optimization of quantization accuracy of the spectral envelope can be used for a lossless reduction in bitrate of 0.4 kbits/s.

关键词： speech and audio coding end-to-end optimization speech source modeling

来源：评论

学校读者我要写书评

暂无评论

end-to-end optimization of High-Density e-Skin Design: From Spiking Taxel Readout to Texture Classification

End-to-End Optimization of High-Density e-Skin Design: From ...

引用

Design, Automation and Test in Europe Conference and Exhibition (DATE)

作者： Wang, Jiaqi Alea, Mark Daniel Van Assche, Jonah Gielen, Georges G. E. Katholieke Univ Leuven ESAT Leuven Belgium Imec B-3001 Leuven Belgium

ISBN: (纸本)9798350396249

Spiking readout architectures are a promising low-power solution for high-density e-skins. This paper proposes the end-to-end model-based optimization of a high-density neuromorphic e-skin solution, from the taxel readout to the texture classification. Architectural explorations include the spike coding and preprocessing, and the neural network used for classification. Simple rate coding preprocessing to spiking outputs from a modeled low-resolution on-chip spike encoder is demonstrated to achieve a comparable texture classification accuracy of 90 % at lower power consumption compared to the state of art. The modeling has also been extended from single-channel sensor recording to time-shifted multi-taxel readout. Applying this optimization to an actual tactile sensor array, the classification accuracy is boosted by 63 % for a low-cost FFNN using multi-taxel data. The proposed Spike-based SNR (SSNR) and Spike Time Error (STE) metrics for the taxel readout circuitry are shown to be good predictors of the accuracy.

关键词： electronic skin spiking readout neuromorphic end-to-end optimization spike encoding metrics

来源：评论

学校读者我要写书评

暂无评论

end-to-end optimization of Fluidic Lenses 24

End-to-end Optimization of Fluidic Lenses

引用

2024 SIGGRAPH Asia Conference

作者： Na, Mulun Romero, Hector A. Jimenez Yang, Xinge Klein, Jonathan Michels, Dominik L. Heidrich, Wolfgang KAUST Thuwal Saudi Arabia

ISBN: (纸本)9798400711312

Prototyping and small volume production of custom imaging-grade lenses is difficult and expensive, especially for more complex aspherical shapes. Fluidic shaping has recently been proposed as a potential solution: It makes use of the atomic level smoothness of interfaces between liquids, where the shape of the interface can be carefully controlled by boundary conditions, buoyancy control and other physical parameters. If one of the liquids is a resin, its shape can be "frozen" by curing, thus creating a solid optical element. While fluidic shaping is a promising avenue, the shape space generated by this method is currently only described in the form of partial differential equations, which are incompatible with existing lens design processes. Moreover, we show that the existing PDEs are inaccurate for larger curvatures. In this work, we develop a new formulation of the shape space lenses generated by the fluidic shaping technique. It overcomes the inaccuracies of previous models, and, through a differentiable implementation, can be integrated into recent end-to-end optical design pipelines based on differentiable ray tracing. We extensively evaluate the model and the design pipeline with simulations, as well as initial physical prototypes.

关键词： Lens Design end-to-end optimization Fluid Dynamics Reconstruction Network

来源：评论

学校读者我要写书评

暂无评论

end-to-end optimization of a diffractive optical element and aberration correction for integral imaging

引用

Chinese Optics Letters 2022年第12期20卷 12-18页

作者： Xiangyu Pei Xunbo Yu Xin Gao Xinhui Xie Yuedi Wang Xinzhu Sang Binbin Yan State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

In the integral imaging light field display, the introduction of a diffractive optical element (DOE) can solve the problem of limited depth of field of the traditional lens. However, the strong aberration of the DOE significantly reduces the final display quality. Thus, herein, an end-to-end joint optimization method for optimizing DOE and aberration correction is proposed. The DOE model is established using thickness as the variable, and a deep learning network is built to preprocess the composite image loaded on the display panel. The simulation results show that the peak signal to noise ratio value of the optimized image increases by 8 dB, which confirms that the end-to-end joint optimization method can effectively reduce the aberration problem.

关键词： integral imaging diffractive optical element end-to-end optimization deep learning network aberration correction

来源：评论

学校读者我要写书评

暂无评论

An approach for end-to-end optimization of low-thrust interplanetary trajectories using collinear libration points☆ ☆

引用

ACTA ASTRONAUTICA 2024年 221卷 12-25页

作者： Yoon, Sung Wook Petukhov, Viacheslav Ivanyukhin, Alexey Moscow Inst Aviat Technol Aerosp Dept Volokolamskoye Shosse 4 Moscow 125099 Russia Moscow Inst Aviat Technol Res Inst Appl Mech & Electrodynam Leningradskoye Shosse 5 Moscow 125080 Russia RUDN Univ Miklukho Maklaya St 6 Moscow 117198 Russia

This article presents an approach to solve the problem of end-to-end optimization of the low-thrust interplanetary trajectory. At first, the problem of optimizing low-thrust interplanetary trajectory, which passes through the collinear libration points near the planets of departure and arrival is considered. The obtained solutions from this problem can be used as an initial guess to solve the end-to-end optimization problem, i.e., to calculate interplanetary low-thrust trajectories that satisfy the necessary optimality conditions at the match points of the heliocentric and planetocentric segments of trajectory. The minimum-fuel problem is considered. An indirect method based on the maximum principle, and the continuation method is applied to optimize interplanetary spacecraft trajectories. Numerical examples of trajectories from the Earth orbit to the orbit around the destination planet (Mars and Jupiter) are given. The possibility of a significant reduction in the required characteristic velocity is shown in comparison with the estimates obtained by using the zero-radius sphere of influence model.

关键词： Low-thrust Interplanetary trajectory end-to-end optimization Maximum principle Minimum-fuel problem Libration point

来源：评论

学校读者我要写书评

暂无评论

Cross-Layer and end-to-end optimization for the Integrated Wireless and Wireline Network

引用

JOURNAL OF COMMUNICATIONS AND NETWORKS 2012年第5期14卷 554-565页

作者： Gong, Seong-Lyong Roh, Hee-Tae Lee, Jang-Won Univ Texas Austin Dept Elect & Comp Engn Austin TX 78712 USA Yonsei Univ Dept Elect & Elect Engn Seoul 120749 South Korea

In this paper, we study a cross-layer and end-to-end optimization problem for the integrated wireless and wireline network that consists of one wireline core network and multiple wireless access networks. We consider joint end-to-end flow control/distribution at the transport and network layers and opportunistic scheduling at the data link and physical layers. We formulate a single stochastic optimization problem and solve it by using a dual approach and a stochastic sub-gradient algorithm. The developed algorithm can be implemented in a distributed way, vertically among communication layers and horizontally among all entities in the network, clearly showing what should be done at each layer and each entity and what parameters should be exchanged between layers and between entities. Numerical results show that our cross-layer and end-to-end optimization approach provides more efficient resource allocation than the conventional layered and separated optimization approach.

关键词： Cross-layer optimization end-to-end optimization wireless access network wireline core network

来源：评论

学校读者我要写书评

暂无评论

Compressive Spectral Imaging Fusion Implementation Based on an end-to-end optimization Design 22

Compressive Spectral Imaging Fusion Implementation Based on ...

引用

23rd Symposium on Image, Signal Processing and Artificial Vision (STSIVA)

作者： Jacome, Roman Escobar, Jessica Baccat, Jorge Arguello, Henry Univ Ind Santander Dept Elect Engn Bucaramanga Santander Colombia Univ Ind Santander Dept Comp Sci Bucaramanga Santander Colombia

ISBN: (纸本)9781665416696

Compressive spectral imaging fusion (CSIF) has recently attracted attention as a popular methodology to improve the spatial and spectral resolution simultaneously. The joint of coded aperture design with the fusion via a deep neural network is state-of-the-art for CSIF. However, the current results are focused on simulation results where implementation complications such as calibration and adjustment processes in the fusion methods are skipped. Therefore, this paper presents an efficient assemble prototype for CSIF. In particular, some implementation details such as pixel mismatch and manufacturing noise are considered during the training to reduce the calibration problems. Furthermore, a re-training of the network using captured ground truth images and the calibrated sensing matrices is presented. Real fusion results of the testbed implementation validated the proposed fusion system.

关键词： end-to-end optimization Fusion Methods Compressive Spectral Imaging Deep learning Testbed implementation

来源：评论

学校读者我要写书评

暂无评论

3D GEOMETRY DESIGN VIA end-to-end optimization FOR LAND SEISMIC ACQUISITION 29

3D GEOMETRY DESIGN VIA END-TO-END OPTIMIZATION FOR LAND SEIS...

引用

IEEE International Conference on Image Processing (ICIP)

作者： Hernandez-Rojas, Alejandra Arguello, Henry Univ Ind Santander Dept Geophys Bucaramanga Colombia Univ Ind Santander Dept Comp Sci Bucaramanga Colombia

ISBN: (数字)9781665496209

ISBN: (纸本)9781665496209

Seismic acquisition is important in the exploration of the subsurface to find new petroleum fields, where a regular-spaced dense acquisition is critical to obtain high-quality seismic images. However, the acquisition costs and environmental impacts have motivated undersampled acquisition schemes, where several sensing points are removed to decrease the total seismic sources. After the undersampled measurements are acquired, a recovery algorithm reconstructs the missing seismic images (shots). The removed sources are currently selected using random sensing schemes, leading to suboptimal quality in the recovered seismic images. Thus, an optimal design of the removed sources is crucial as it determines the quality of the recovered shots. This work proposes an end-to-end optimization to jointly design undersampled seismic acquisition geometries while preserving the high-quality of the reconstructed data. The seismic acquisition geometry is modeled as a deep binary layer to learn the optimal sensing pattern, while a deep neural network is used to recover the underlying removed shots. Extensive simulations were carried out on a realistic-synthetic Foothills model. The results obtained on the reconstructed data validate that the proposed acquisition design outperforms the state-of-the-art random, uniform, and jitter sensing schemes in 4 dB.

关键词： Seismic Acquisition Geometry end-to-end optimization Seismic Data Reconstruction Designed Sensing Pattern Undersampling Rate

来源：评论

学校读者我要写书评

暂无评论

Comparison of three methods for end-to-end optimization of hybrid optical/digital imaging systems with professional optical design software 3

Comparison of three methods for end-to-end optimization of h...

引用

Conference on Unconventional Optical Imaging III Part of SPIE Photonics Europe Conference

作者： Fontbonne, Alice Sauer, Herve Goudail, Francois Univ Paris Saclay Inst Opt Grad Sch CNRS Lab Charles Fabry F-91127 Palaiseau France

ISBN: (纸本)9781510651494;9781510651487

We compare different methods to optimize end-to-end a hybrid optical/digital system for best and most uniform performance over the field-of-view with the Synopsys((R)) CodeV((R)) lens design software. We have extended the native optimization capability of this software by implementing different methods that leverage the deconvolution during the optimization process of the hybrid optical system as a whole, including simultaneously their optical and digital image processing parts. We show that the joint optimization of the lens and the processing through a true restored-image quality criterion significantly enhances the final post-processed image quality, and allows to fine-tune the residual balancing between on-axis and peripheral fields with simple weighting coefficients.

关键词： Complex lens end-to-end optimization hybrid system optical system design

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：