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Conference on Three-dimensional Imaging, Visualization, and display 2010 and display Technologies and Applications for defence, Security, and Avionics IV

作者： Park, Min-Chul Son, Jung-Young KIST Photon Sensor Syst Seoul South Korea Daegu Univ Sch Comp & Commun Eng Daegu South Korea

ISBN: (纸本)9780819481542

Industrial welded metal Bellows is in shape of flexible pipeline. The most common form of bellows is as pairs of washer-shaped discs of thin sheet metal stamped from strip stock. Performing arc welding operation may cause dangerous accidents and bad smells. Furthermore, in the process of welding operation, workers have to observe the object directly through microscope adjusting the vertical and horizontal positions of welding rod tip and the bellows fixed on the jig, respectively. Welding looking through microscope makes workers feel tired. To improve working environment that workers sit in an uncomfortable position and productivity we introduced 3d display and image processing. Main purpose of the system is not only to maximize the efficiency of industrial productivity with accuracy but also to keep the safety standards with the full automation of work by distant remote controlling.

关键词： 3d displays Metals Microscopes image processing 3d image processing Control systems Computing systems Glasses Polarization Safety

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3d REPRESENTATION OF MICROSCOPIC SPECIMENS USING CONFOCAL MICROSCOPY ANd dIGITAL image-processing

3D REPRESENTATION OF MICROSCOPIC SPECIMENS USING CONFOCAL MI...

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CONF ON BIOMEdICAL image processing

作者： CARLSSON, K Royal Institute of Technology (Sweden)

ISBN: (纸本)0819402923

In this paper a review is first given of how confocal fluorescence microscopy in combination with digital image processing can be utilized to present three-dimensional images of microscopic specimens. Examples of different display techniques are given as well as data on typical computing speeds when using a SUN 386i workstation. In the latter part of the paper we discuss signal quality and factors limiting the thickness of the specimen volume that can be studied. Multiple-wavelength registration is also described, as well as a method for eliminating detector "cross-talk" when recording two fluorophores with overlapping emission spectra.

关键词： Confocal microscopy Sensors image processing Luminescence Microscopy Objectives 3d image processing Biomedical optics Optical filters Computing systems

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RESEARCH OF 3d FIELdS USING TECHNOLOGY OF image-processing 12

RESEARCH OF 3D FIELDS USING TECHNOLOGY OF IMAGE-PROCESSING

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12TH CONF ON INTELLIGENT ROBOTS ANd COMPUTER VISION : ACTIVE VISION ANd 3d METHOdS

作者： WANG, dZ XIONG, YG WANG, JX Nanjing Aeronautical Institute (China)

ISBN: (纸本)0819413216

In this paper, a new method to research 3d fields is provided. That is technology of image processing. The stereo images and shapes of 3d field are reconstructed. The geometric parameters and their transform of 3d field are acquired. Three-dimensional fields are analyzed and researched directly using this method. It has many advantages, especially there are several 3d fields researched at the same time. From the examples, we know that the method provided in this paper is correct, and the results are reliable.

关键词： 3d image processing Analytical research Computer vision technology image processing Machine vision 3d image reconstruction Robot vision Robots image filtering Infrared imaging

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diffractive 3d phase gratings will qualify optical sensors and image processing technologies for reaching performances of human vision

Diffractive 3D phase gratings will qualify optical sensors a...

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Conference on Intelligent Robots and Computer Vision XIX: Algorithms, Techniques, and Active Vision

作者： Lauinger, N CORRSYS DATRON Sensorsyst GMBH D-35578 Wetzlar Germany

diffractive 2d and 3d grating optics as enabling technologies are on a good way to technically realize specific features well known in human vision. How does the human eye do its job in visual information processing?

ISBN: (纸本)0819438626

关键词： diffraction gratings 3d image processing diffraction RGB color model Human vision and color perception Eye 3d vision Cones Visualization Retina

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NEW METHOd OF 3d RECONSTRUCTION FOR MEdICAL image-processing

NEW METHOD OF 3D RECONSTRUCTION FOR MEDICAL IMAGE-PROCESSING

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Conference on Clinical Applications of Modern Imaging Technology II

作者： XIONG, YG WANG, dZ NANJING UNIV AERONAUT & ASTRONAUT CTR TEST & MEASUREMENTNANJING 210016PEOPLES R CHINA

ISBN: (纸本)0819414271

In this paper, a new method of 3d reconstruction for medical image processing is presented. In this method, the organic 3d image is reconstructed using several CT photographs. Because the transparent techniques are used, not only the organic surface but also the size and shape inside the organs can be observed and measured. Compared with the 3d reconstruction method for medical image before, this method has more advantages such as higher simulating precision and very convenient for measurement. It expresses through the application on actual medical images that the organic position and its area and volume can be measured and calculated precisely using the 3d reconstruction method presented in this paper. It is very useful for analyzing and researching organic pathological changes and making correct decision of diagnosis. The 3d reconstruction method presented in this paper is a good method for medical image processing.

关键词： 3d image processing 3d image reconstruction image processing Medical imaging 3d modeling 3d metrology Computed tomography image segmentation Natural surfaces Head

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diffractive 3d grating-optical image processing: an interference-optical Volterra filter resonator?

Diffractive 3D grating-optical image processing: an interfer...

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Conference on Intelligent Robots and Computer Vision XX: Algorithms, Techniques, and Active Vision

作者： Lauinger, N CORRSYS-DATRON Sensorsysteme GmbH (Germany)

ISBN: (纸本)081944300X

Intelligent image processing will take a more and more important part of the future opto-electronic sensor business. To filter relevant information out of a large data base and to memorize selectively the most important messages become critical features and the camera-like systems cannot reach the goal. A 'cortical' image processor, similar to how human vision and perception are functioning, is requested. This particularly in a world where global video-communication becomes an ubiquitous standard. The search for new filtering methods and more intelligent visual information processors therefore remains an item of topical interest for R+d-activities.

关键词： image filtering Optical filters Spatial frequencies 3d image processing image processing diffraction gratings Resonators Sensors diffraction image enhancement

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Interpretable dimensionality Reduction in 3d image Recognition with Small Sample Sizes

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JOURNAL OF NONdESTRUCTIVE EVALUATION 2025年第2期44卷 1-12页

作者： Koptev, Ivan Tian, Jiacheng Peel, Eddie Barker, Rachel Walker, Cameron Kempa-Liehr, Andreas W. Univ Auckland Dept Engn Sci & Biomed Engn 70 Symonds St Auckland 1010 New Zealand Minist Primary Ind 17 Maurice Wilson AveMangere Auckland 2022 New Zealand

A systematic feature-engineering approach to generate informative 2d representations of 3d data is introduced. In this method, the sequences of voxels along one axis of the 3d image are treated as spatial variation sequences. These sequences are projected into a 783-dimensional feature space using algorithms from statistics, signal processing, complexity theory as well as time-series forecasting and financial time-series analysis. The resulting two-dimensional image has 783 layers from which the most relevant three layers are chosen using a combination of univariate and multivariate feature selection. This process effectively converts the volumetric data into a two-dimensional three-layer image which can then be used as input to established object detection models. The validation of the method is conducted on an object detection application, involving the identification of biomatter threats in 3d X-ray scans of international travellers' baggage. The 3d scans were recorded at the Airport in Auckland, New Zealand, and comprised 1525 biomatter threats distributed over 690 different bags. Various object detection models from the YOLO series are tested on this dataset. The YOLOv5l model achieved the highest mAP@0.5 of 0.878 on the validation dataset. Our results demonstrate that the methodologies of time-series classification and pattern recognition can be combined to implement efficient pattern recognition on 3d data sets with small sample sizes.

关键词： Object detection 3d image processing X-ray security imaging

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PROGRAMMABLE OPTICAL GRIdS - NEW POSSIBILITIES FOR 2-d ANd 3-d image-processing

PROGRAMMABLE OPTICAL GRIDS - NEW POSSIBILITIES FOR 2-D AND 3...

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Conference on Computer Vision for Industry

作者： WOLF, HGE AUTOMATISIERUNG BILDVERARBEITUNG WOLF D-73765 NEUHAUSENGERMANY

ISBN: (纸本)0819412384

Programmable optical grids can be projected directly on the surface of unpolished test-pieces to realize an absolute measurement method called `coded light approach' to obtain a full depth- image, requiring only a small number of projections. In combination with the phase shifting method subpixel accuracy is achieved. Geometry-checking and controlling the surface quality of objects with mirror-like surfaces is done with indirect illumination. Using a line-projector, stripes are projected to a diffusely reflecting surface, e.g. a wall. The test piece is positioned so that the lines are seen indirectly by the camera, reflected in the surface.

关键词： Cameras Projection systems Computer vision technology Machine vision 3d image processing Video 3d vision Binary data Light sources and illumination Phase shifting

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processing 3d Point Clouds for High-Throughput Plant Phenotyping 8th

Processing 3D Point Clouds for High-Throughput Plant Phenoty...

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8th National Conference on Computer Vision, Pattern Recognition, image processing and Graphics-NCVPRIPG

作者： dagar, Preety Arora, Alka Kumar, Sudhir Marwaha, Sudeep Jain, Rajni Chaurasia, Himanshushekhar Chinnusamy, Vishwanathan ICAR IASRI Div Comp Applicat Library Ave New Delhi 110012 India IARI Pusa ICAR IARI Div Plant Physiol New Delhi 110012 India ICAR CIRCOT Mumbai 400019 Maharashtra India

ISBN: (纸本)9789819752119;9789819752126

In recent years, measuring three-dimensional (3d) surface information has gained a great interest in plant phenotyping because it can represent the nature of plant architecture better than conventional 2d images. This paper presents an approach for processing 3d point clouds converted from 2d RGB images in the context of high-throughput plant phenotyping. High-resolution RGB multi-view imagery of a Chickpea plant was collected using a high-end camera. Based on these image sequences, 3d point cloud reconstruction of the canopy was conducted and analyzed. Later sophisticated 3d operations were performed on these images including 3d downsampling and after that clustering was performed on the processed point cloud. The information generated can help in the evaluation of crop traits and provide accurate statistics for the assessment of their growth parameters.

关键词： 3d image processing 2d to 3d image conversion Open3d 3d image processing for plant phenotyping

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A Comparative Study of Rigid Three-dimensional image Registration Methods for Powder Bed Fusion with Laser Beam of Metals Using a Gold Standard Approach

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JOURNAL OF NONdESTRUCTIVE EVALUATION 2025年第1期44卷 1-20页

作者： Chand, Keerthana Fritsch, Tobias Oster, Simon Ulbricht, Alexander Poka, Konstantin Bruno, Giovanni Fed Inst Mat Res & Testing Bundesanstalt Materialforschung & Prufung BAM Unter Eichen 87 D-12205 Berlin Germany Univ Potsdam Inst Phys & Astron Karl Liebknecht Str 24-25 D-14476 Potsdam Germany

In Additive Manufacturing (AM), precise rigid three-dimensional (3d) image registration between X-ray Computed Tomography (XCT) scans and Computer-Aided design (CAd) models is an important step for the quantification of distortions in produced parts. Given the absence of standardized benchmarks for image registration in AM, we introduce a gold standard for 3d image registration, using a reference base plate beneath the build structure. This gold standard is used to quantify the accuracy of rigid registration, with a proof of concept demonstrated in PBF-LB/M. In this study, we conduct a comparative analysis of various rigid 3d registration methods useful for quality assurance of PBF-LB/M parts including feature-based, intensity-based, and point cloud-based approaches. The performance of each registration method is evaluated using measures of alignment accuracy based on the gold standard and computational efficiency. Our results indicate significant differences in the efficacy of these methods, with point cloud based Coherent Point drift (CPd) showing superior performance in both alignment and computational efficiency. The rigidly registered 3d volumes are used to estimate the deformation field of the printed parts relative to the nominal CAd design using digital Volume Correlation (dVC). The quality of the estimated deformation field is assessed using the dice score metric. This study provides insights into methods for enhancing the precision and reliability of AM process.

关键词： 3d image registration 3d image processing X-ray computed tomography Computer-aided design displacement field estimation digital volume correlation

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