Optical Synchronization Of Time Of Flight Cameras
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Optical Synchronization Of Time Of Flight Cameras
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Author : Felix Wermke
language : en
Publisher:
Release Date : 2023*
Optical Synchronization Of Time Of Flight Cameras written by Felix Wermke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023* with categories.
Englische Version: Time-of-Flight (ToF) cameras produce depth images (three-dimensional images) by measuring the time between the emission of infrared light and the reception of its reflection. A setup of multiple ToF cameras may be used to overcome their comparatively low resolution, increase the field of view, and reduce occlusion. However, the simultaneous operation of multiple ToF cameras introduces the possibility of interference resulting in erroneous depth measurements. The problem of interference is not only related to a collaborative multicamera setup but also to multiple ToF cameras operating independently. In this work, a new optical synchronization for ToF cameras is presented, requiring no additional hardware or infrastructure to utilize a time-division multiple access (TDMA) scheme to mitigate interference. It effectively enables a camera to sense the acquisition process of other ToF cameras and rapidly synchronizes its acquisition times to operate without interference. Instead of requiring cables to synchronize, only the existing hardware is utilized to enable an optical synchronization. To achieve this, the camera's firmware is extended with the synchronization procedure. The optical synchronization has been conceptualized, implemented, and verified with an experimental setup deploying three ToF cameras. The measurements show the efficacy of the proposed optical synchronization. During the experiments, the frame rate was reduced by only about 1% due to the synchronization procedure.
Time Of Flight Cameras
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Author : Miles Hansard
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-11-06
Time Of Flight Cameras written by Miles Hansard and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-06 with Computers categories.
Time-of-flight (TOF) cameras provide a depth value at each pixel, from which the 3D structure of the scene can be estimated. This new type of active sensor makes it possible to go beyond traditional 2D image processing, directly to depth-based and 3D scene processing. Many computer vision and graphics applications can benefit from TOF data, including 3D reconstruction, activity and gesture recognition, motion capture and face detection. It is already possible to use multiple TOF cameras, in order to increase the scene coverage, and to combine the depth data with images from several colour cameras. Mixed TOF and colour systems can be used for computational photography, including full 3D scene modelling, as well as for illumination and depth-of-field manipulations. This work is a technical introduction to TOF sensors, from architectural and design issues, to selected image processing and computer vision methods.
Camera Time Synchronization System
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Author : Ammar Chinoy
language : en
Publisher:
Release Date : 2020-12-20
Camera Time Synchronization System written by Ammar Chinoy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-20 with categories.
Systems involving a plurality of cameras with clocks may not remain time synchronized during operation. Described in this disclosure are techniques for synchronizing one or more of the clocks of a plurality of cameras or the images produced by the plurality of cameras. In one implementation, a timestamp projector produces an optical timestamp encoding data indicative of timing. One or more cameras may acquire images of a scene that include the optical timestamp. The images may be processed to recover the data indicative of timing. This data may be used to set the clock of the camera, set timestamps associated with the images for subsequent use, and so forth.
Tof Range Imaging Cameras
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Author : Fabio Remondino
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-09
Tof Range Imaging Cameras written by Fabio Remondino and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-09 with Technology & Engineering categories.
Today the cost of solid-state two-dimensional imagers has dramatically dropped, introducing low cost systems on the market suitable for a variety of applications, including both industrial and consumer products. However, these systems can capture only a two-dimensional projection (2D), or intensity map, of the scene under observation, losing a variable of paramount importance, i.e., the arrival time of the impinging photons. Time-Of-Flight (TOF) Range-Imaging (TOF) is an emerging sensor technology able to deliver, at the same time, depth and intensity maps of the scene under observation. Featuring different sensor resolutions, RIM cameras serve a wide community with a lot of applications like monitoring, architecture, life sciences, robotics, etc. This book will bring together experts from the sensor and metrology side in order to collect the state-of-art researchers in these fields working with RIM cameras. All the aspects in the acquisition and processing chain will be addressed, from recent updates concerning the photo-detectors, to the analysis of the calibration techniques, giving also a perspective onto new applications domains.
Machine Vision Algorithms And Applications
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Author : Carsten Steger
language : en
Publisher: John Wiley & Sons
Release Date : 2018-03-12
Machine Vision Algorithms And Applications written by Carsten Steger and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-12 with Science categories.
The second edition of this successful machine vision textbook is completely updated, revised and expanded by 35% to reflect the developments of recent years in the fields of image acquisition, machine vision algorithms and applications. The new content includes, but is not limited to, a discussion of new camera and image acquisition interfaces, 3D sensors and technologies, 3D reconstruction, 3D object recognition and state-of-the-art classification algorithms. The authors retain their balanced approach with sufficient coverage of the theory and a strong focus on applications. All examples are based on the latest version of the machine vision software HALCON 13.
Solutions For Cyber Physical Systems Ubiquity
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Author : Druml, Norbert
language : en
Publisher: IGI Global
Release Date : 2017-07-20
Solutions For Cyber Physical Systems Ubiquity written by Druml, Norbert and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-20 with Computers categories.
Cyber-physical systems play a crucial role in connecting aspects of online life to physical life. By studying emerging trends in these systems, programming techniques can be optimized and strengthened to create a higher level of effectiveness. Solutions for Cyber-Physical Systems Ubiquity is a critical reference source that discusses the issues and challenges facing the implementation, usage, and challenges of cyber-physical systems. Highlighting relevant topics such as the Internet of Things, smart-card security, multi-core environments, and wireless sensor nodes, this scholarly publication is ideal for engineers, academicians, computer science students, and researchers that would like to stay abreast of current methodologies and trends involving cyber-physical system progression.
Quantitative Biomedical Optics
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Author : Irving J. Bigio
language : en
Publisher: Cambridge University Press
Release Date : 2016-01-07
Quantitative Biomedical Optics written by Irving J. Bigio and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-01-07 with Medical categories.
Based on physical science principles, Quantitative Biomedical Optics covers theory, instrumentation, methods and applications, with practical exercises and problem sets.
Computer Vision Metrics
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Author : Scott Krig
language : en
Publisher: Springer
Release Date : 2016-09-16
Computer Vision Metrics written by Scott Krig and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-16 with Computers categories.
Based on the successful 2014 book published by Apress, this textbook edition is expanded to provide a comprehensive history and state-of-the-art survey for fundamental computer vision methods and deep learning. With over 800 essential references, as well as chapter-by-chapter learning assignments, both students and researchers can dig deeper into core computer vision topics and deep learning architectures. The survey covers everything from feature descriptors, regional and global feature metrics, feature learning architectures, deep learning, neuroscience of vision, neural networks, and detailed example architectures to illustrate computer vision hardware and software optimization methods. To complement the survey, the textbook includes useful analyses which provide insight into the goals of various methods, why they work, and how they may be optimized. The text delivers an essential survey and a valuable taxonomy, thus providing a key learning tool for students, researchers and engineers, to supplement the many effective hands-on resources and open source projects, such as OpenCV and other imaging and deep learning tools.
Information Technology In Biomedicine
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Author : Ewa Pietka
language : en
Publisher: Springer
Release Date : 2018-06-05
Information Technology In Biomedicine written by Ewa Pietka and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-05 with Technology & Engineering categories.
ITiB’2018 is the 6th Conference on Information Technology in Biomedicine, hosted every two years by the Department of Informatics & Medical Devices, Faculty of Biomedical Engineering, Silesian University of Technology. The Conference is organized under the auspices of the Committee on Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences. The meeting has become an established event that helps to address the demand for fast and reliable technologies capable of processing data and delivering results in a user-friendly, timely and mobile manner. Many of these areas are recognized as research and development frontiers in employing new technology in the clinical setting. Technological assistance can be found in prevention, diagnosis, treatment, and rehabilitation alike. Homecare support for any type of disability may improve standard of living and make people’s lives safer and more comfortable. The book includes the following sections: Ø Image Processing Ø Multimodal Imaging and Computer-aided Surgery Ø Computer-aided Diagnosis Ø Signal Processing and Medical Devices Ø Bioinformatics Ø Modelling & Simulation Ø Analytics in Action on the SAS Platform Ø Assistive Technologies and Affective Computing (ATAC)
Computer Vision Metrics
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Author : Scott Krig
language : en
Publisher: Apress
Release Date : 2014-06-14
Computer Vision Metrics written by Scott Krig and has been published by Apress this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-14 with Computers categories.
Computer Vision Metrics provides an extensive survey and analysis of over 100 current and historical feature description and machine vision methods, with a detailed taxonomy for local, regional and global features. This book provides necessary background to develop intuition about why interest point detectors and feature descriptors actually work, how they are designed, with observations about tuning the methods for achieving robustness and invariance targets for specific applications. The survey is broader than it is deep, with over 540 references provided to dig deeper. The taxonomy includes search methods, spectra components, descriptor representation, shape, distance functions, accuracy, efficiency, robustness and invariance attributes, and more. Rather than providing ‘how-to’ source code examples and shortcuts, this book provides a counterpoint discussion to the many fine opencv community source code resources available for hands-on practitioners.