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检索条件"任意字段=Conference on 3-Dimensional and Multidimensional Microscopy - Image Acquisition and Processing X"

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A 3D Information Supplementary acquisition Method for Fundamental Geo-Entity Data

A 3D Information Supplementary Acquisition Method for Fundam...

引用

2024 International conference on Mechatronics and Intelligent Control, ICMIC 2024

作者： Zheng, Yi Zhang, Shengpeng Li, Limeng Zhang, Yuanjie Li, xuemei National Geomatics Center of China Beijing China Qinghai Provincial Key Laboratory of Geomatics Technology and Application China Qinghai Provincial Basic Surveying and Mapping Institute China

ISBN: (数字)9781510686847

ISBN: (纸本)9781510686830

National fundamental geo-entity construction has been vigorously promoted by the Ministry of Natural Resources of the People's Republic of China. As one of the core products, it is a digital abstract expression of the real world in the form of 2 dimensions, which is difficult to fully meet the actual needs of analysis, calculation and use in the 3-dimensional digital space. This paper designs the process and key technologies for collecting elevation and height information of fundamental geo-entities to upgrade them from 2D to 3D form. This paper elaborates on the implementation process of key technologies such as elevation information acquisition based on DEM, stereo measurement of elevation information, height information acquisition. A practical and feasible process for elevation and height acquisition method of fundamental geo-entity has been formed, which effectively utilizes the advantages of geo-entities in information carrying, expression, sharing, and association. The experimental results show that the production process described in this paper can quickly and effectively obtain elevation and height information of geo-entities and result in 3D fundamental geo-entities, providing technical support and important references for upgrading fundamental geo-entities from 2D to 3D form. © 2025 SPIE.

关键词： Stereo image processing

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Enhancing defocus blur in three-dimensional scenes via high-speed optical axial scanning and deep learning 2

Enhancing defocus blur in three-dimensional scenes via high-...

引用

2nd International Academic conference on Optics and Photonics, IACOP 2024

作者： Li, Zilong Tang, Chenxi Dong, Jiaqing Liu, xuan Lin, Jiabin Liu, Qiegen Song, xianlin School of Information Engineering Nanchang University Nanchang330031 China Jiangxi Provincial Key Laboratory of Advanced Signal Processing and Intelligent Communications Nanchang University Nanchang330031 China

ISBN: (数字)9781510688827

ISBN: (纸本)9781510688810

Mitigating image defocus blur induced by the limited depth of field in imaging systems and reconstructing the three-dimensional depth of scenes represents a significant hurdle. In this paper, a method for enhancing defocus blur in three-dimensional scenes via high-speed optical axial scanning and deep learning was proposed. The optical axial scanning system functions by synchronizing a liquid electronically tunable lens and a CCD camera to capture multi-focus image sequences. The system efficiently captures real-world images with a fast acquisition time of ~50 ms per image. The multi-focus image sequences are then fused to all-in-focus images. The multi-focus images and all-in-focus images (ground truth) serve as the dataset for the deep learning neural network. Defocused images can be reconstructed using the trained deep learning network. Furthermore, by establishing a direct relationship between the focal depth and the driving current applied to the liquid electronically tunable lens, the three-dimensional depth of the scene can be rapidly determined. Experimental results validate the feasibility and effectiveness of this method. It is expected to expand the applications of image defocus enhancement in fields such as medical imaging, 3D shape measurement, and augmented reality. © 2025 SPIE.

关键词： CCD cameras

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Scoliosis detection method based on fringe projection profilometry and deep learning

Scoliosis detection method based on fringe projection profil...

引用

2024 International conference on Optical and Photonic Engineering, icOPEN 2024

作者： Wang, Meng He, Dong xu, Shaolei Tang, Qijian Peng, xiang Liu, xiaoli State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Guangdong China Key Laboratory of Intelligent Optical Measurement and Detection of Shenzhen Shenzhen Institute of Information Technology Shenzhen Guangdong China School of Sino-German Robotics Shenzhen Institute of Information Technology Shenzhen Guangdong China

ISBN: (数字)9781510688117

ISBN: (纸本)9781510688100

In this paper, a fringe projection profilometry (FPP) system for three-dimensional (3D) imaging of the human back is proposed to assess scoliosis, which has developed into one of the top four health concerns affecting adolescents. The FPP system includes a binocular stereo vision system and an infrared projector, with a Field Programmable Gate Array (FPGA) based synchronization control system enabling a 240Hz acquisition frame rate. This high frame rate mitigates the impact of involuntary body movement on 3D image quality. Various features can be extracted from the generated 3D model of the back for quantitative postural assessment. Specifically, a deep learning approach is employed to analyze the extracted trunk rotation angle curve for scoliosis detection. Experimental results demonstrate a correlation between this method and x-ray detection, offering a promising exploratory approach to reduce reliance on x-ray imaging in scoliosis monitoring. © 2025 SPIE.

关键词： Stereo image processing

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Deep Unfolded Approximate Message Passing for Quantitative Acoustic microscopy image Reconstruction

Deep Unfolded Approximate Message Passing for Quantitative A...

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International conference on Acoustics, Speech, and Signal processing (ICASSP)

作者： Odysseas Pappas Jonathan Mamou Adrian Basarab Denis Kouamé Alin Achim Visual Information Laboratory University of Bristol Bristol UK Department of Radiology Weill Cornell Medicine New York USA CREATIS University of Lyon Lyon France IRIT University of Toulouse III Paul Sabatier Toulouse France

ISBN: (数字)9798350368741

ISBN: (纸本)9798350368758

Quantitative Acoustic microscopy (QAM) is an imaging technology utilising high frequency ultrasound to produce quantitative two-dimensional (2D) maps of acoustical and mechanical properties of biological tissue at microscopy scale. Increased frequency QAM allows for finer resolution at the expense of increased acquisition times and data storage cost. Compressive sampling (CS) methods have been employed to produce QAM images from a reduced sample set, with recent state of the art utilising Approximate Message Passing (AMP) methods. In this paper we investigate the use of AMP-Net, a deep unfolded model for AMP, for the CS reconstruction of QAM parametric maps. Results indicate that AMP-Net can offer superior reconstruction performance even in its stock configuration trained on natural imagery (up to 63% in terms of PSNR), while avoiding the emergence of sampling pattern related artefacts.

关键词： Training Time-frequency analysis Ultrasonic imaging Quadrature amplitude modulation microscopy Message passing Two-dimensional displays Acoustics Speech processing image reconstruction

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4D image processing in microscopy by combined methods

4D image processing in microscopy by combined methods

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conference on 3 dimensional and multidimensional microscopy - image acquisition processing VII

作者： Kriete, A Image Proc Lab Inst Anat & Cell Biol D-35385 Giessen Germany

ISBN: (纸本)081943535X

In time-lapse microscopy image quality is limited by instrumental and specimen characteristics. Moreover, an enormous amount of data may be accumulated. This challenges not only the development of new tools for image processing, but typically forces methods to be executed in combination. To remedy essential problems, an image processing pipeline is employed which features image restoration, image compression, visualization and analysis. To control the flow of information within this pipeline and to optimize the parameter settings like compression rates or number of iterations, the information content is evaluated on the basis of the ratio of signal and noise.

关键词： time-lapse microscopy 4D image processing compression image restoration visualization and analysis

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High-resolution three-dimensional imaging using multiple nanometric probes

High-resolution three-dimensional imaging using multiple nan...

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conference on 3-dimensional and multidimensional microscopy - image acquisition and processing x

作者： Dubois, A Moneron, G Lecaque, R Lequeux, F Boccara, AC Ecole Super Phys & Chim Ind Ville Paris CNRS UPR A0005 Lab Opt Phys F-75231 Paris 5 France

We present a new imaging modality using nanometric beads as multiple local probes. The positions of the beads are determined in three dimensions using white-light interference microscopy, by over-sampling and fitting ... 详细信息

ISBN: (纸本)0819447641

关键词： interference microscopy three-dimensional microscopy scanning probe microscopy

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Standards in digital microscopy

Standards in digital microscopy

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conference on 3-dimensional and multidimensional microscopy - image acquisition and processing VIII

作者： Kriete, A Shah, S Inst Anat & Cell Biol IPL D-35385 Giessen Germany

This paper discusses some aspects of standardization in digital microscopy. Included are image acquisition, use of image and graphics formats and data protocols in multidimensions, particular image analysis procedures... 详细信息

ISBN: (纸本)0819439398

关键词： Standards microscopy image acquisition image formats image processing

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image estimation for structured-illumination microscopy

Image estimation for structured-illumination microscopy

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conference on 3-dimensional and multidimensional microscopy - image acquisition and processing xII

作者： Conchello, JA Oklahoma Med Res Fdn Program Mol Cell & Dev Biol Oklahoma City OK 73104 USA

ISBN: (纸本)0819456756

When recording three-dimensional (3D) images by the method of optical sectioning microscopy, each optical section contains the in-focus information plus out-of-focus contributions that obscure the in-focus detail and reduce contrast. There are several methods to remove or prevent the out-of-focus contributions from the stack of optical sections. One such method is image estimation -the use of a computer program based on a mathematical description of the microscope to remove the out-of-focus contributions. Another method is the use of structured illumination and a simple arithmetic operation to obtain a image that in which the out-of-focus contributions are greatly reduced. We derived a method for image estimation that uses the images collected from the structured-illumination microscope. The method improves the resolution of small detail over that possible with the structured illumination using the simple arithmetic formula.

关键词： image analysis Expectation maximization algorithms Microscopes microscopy 3D image processing Confocal microscopy image acquisition image processing Point spread functions Luminescence

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Optically sectioned images in widefield fluorescence microscopy

引用

conference on 3-dimensional and multidimensional microscopy - image acquisition and processing V

作者： Wilson, T Neil, MAA Juskaitis, R Univ Oxford Dept Engn Sci Oxford OX1 3PJ England

An analysis is presented of the image formation in widefield fluorescence microscopy using standard light. The region of support of the resulting optical transfer function is discussed.

ISBN: (纸本)0819427004

An analysis is presented of the image formation in widefield fluorescence microscopy using standard light. The region of support of the resulting optical transfer function is discussed.

关键词： Luminescence microscopy Fringe analysis Spatial frequencies image acquisition Microscopes Imaging systems Optical transfer functions Point spread functions Roads

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En-face optical coherence imaging for three-dimensional microscopy

En-face optical coherence imaging for three-dimensional micr...

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conference on 3-dimensional and multidimensional microscopy: image acquisition and processing Ix

作者： Akiba, M Chan, KP Tanno, N Japan Sci & Technol Corp Reg Joint Res Project Yamagata 9902473 Japan

ISBN: (纸本)0819443603

En-face optical coherence tomography (OCT) employing parallel heterodyne detection technique is demonstrated for three-dimensional microscopy. To enable the use of commercially available CCD cameras as two-dimensional heterodyne detector arrays in OCT imaging, a frequency synchronous detection method is Employed. Depth-resolved, full-field images are acquired at 30 Hz video-rate without lateral scanning.

关键词： three-dimensional microscopy optical coherence tomography frequency synchronous detection

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