[PDF] Physics And Algorithms In Time Of Flight Based Computational Imaging eBook

Author : Venkata Subhash Chandra Sadhu
Publisher :
Page : 0 pages
File Size : 35,5 MB
Release : 2021
Category :
ISBN :

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Imaging systems work on an interplay of physics, electronics, and algorithms. Designing imaging systems by exploiting all these layers of abstraction can give rise to novel applications and interesting solutions to existing problems. In this thesis, I will explore this design philosophy in 2 problems; automatic calibration of cameras that can see around corners, high resolution optical measurement of ultrasound. I will utilize advanced electronics hardware like femtosecond lasers, and Single Photon Avalanche Photodiode(SPAD) detectors for the automatic calibration project and software tools meant for machine learning in Python. For optical ultrasound measurement, I will use relatively simple hardware like solid state lasers, bench top optics, Field Programmable Gate Arrays (FPGA), and a synchronised global shutter CMOS camera. Both projects are aimed at solving practical problems in their respective areas. Automatic calibration aims to improve the fidelity of images by algorithmically fixing calibration errors after taking measurements in cameras which can see around the corners. The optical ultrasound project aims to take medical ultrasound images at a very low cost and high resolution by using ideas from optics, laser vibrometry, and signal processing.

Author : Ayush Bhandari
Publisher : MIT Press
Page : 482 pages
File Size : 24,59 MB
Release : 2022-10-25
Category : Technology & Engineering
ISBN : 0262368374

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A comprehensive and up-to-date textbook and reference for computational imaging, which combines vision, graphics, signal processing, and optics. Computational imaging involves the joint design of imaging hardware and computer algorithms to create novel imaging systems with unprecedented capabilities. In recent years such capabilities include cameras that operate at a trillion frames per second, microscopes that can see small viruses long thought to be optically irresolvable, and telescopes that capture images of black holes. This text offers a comprehensive and up-to-date introduction to this rapidly growing field, a convergence of vision, graphics, signal processing, and optics. It can be used as an instructional resource for computer imaging courses and as a reference for professionals. It covers the fundamentals of the field, current research and applications, and light transport techniques. The text first presents an imaging toolkit, including optics, image sensors, and illumination, and a computational toolkit, introducing modeling, mathematical tools, model-based inversion, data-driven inversion techniques, and hybrid inversion techniques. It then examines different modalities of light, focusing on the plenoptic function, which describes degrees of freedom of a light ray. Finally, the text outlines light transport techniques, describing imaging systems that obtain micron-scale 3D shape or optimize for noise-free imaging, optical computing, and non-line-of-sight imaging. Throughout, it discusses the use of computational imaging methods in a range of application areas, including smart phone photography, autonomous driving, and medical imaging. End-of-chapter exercises help put the material in context.

Author : Mukesh D Patil
Publisher : CRC Press
Page : 361 pages
File Size : 46,27 MB
Release : 2023-02-15
Category : Computers
ISBN : 1000832430

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Computational Intelligence in Image and Video Processing presents introduction, state-of-the-art and adaptations of computational intelligence techniques and their usefulness in image and video enhancement, classification, retrieval, forensics and captioning. It covers an amalgamation of such techniques in diverse applications of image and video processing. Features: A systematic overview of state-of-the-art technology in computational intelligence techniques for image and video processing Advanced evolutionary and nature-inspired approaches to solve optimization problems in the image and video processing domain Outcomes of recent research and some pointers to future advancements in image and video processing and intelligent solutions using computational intelligence techniques Code snippets of the computational intelligence algorithm/techniques used in image and video processing This book is primarily aimed at advanced undergraduates, graduates and researchers in computer science and information technology. Engineers and industry professionals will also find this book useful.

Author : Miles Hansard
Publisher : Springer Science & Business Media
Page : 102 pages
File Size : 13,53 MB
Release : 2012-11-06
Category : Computers
ISBN : 1447146581

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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.

Author : Sanjeev Arora
Publisher : Cambridge University Press
Page : 609 pages
File Size : 17,97 MB
Release : 2009-04-20
Category : Computers
ISBN : 0521424267

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New and classical results in computational complexity, including interactive proofs, PCP, derandomization, and quantum computation. Ideal for graduate students.

Author : Ayush Bhandari
Publisher : MIT Press
Page : 482 pages
File Size : 11,69 MB
Release : 2022-10-25
Category : Technology & Engineering
ISBN : 0262046474

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A comprehensive and up-to-date textbook and reference for computational imaging, which combines vision, graphics, signal processing, and optics. Computational imaging involves the joint design of imaging hardware and computer algorithms to create novel imaging systems with unprecedented capabilities. In recent years such capabilities include cameras that operate at a trillion frames per second, microscopes that can see small viruses long thought to be optically irresolvable, and telescopes that capture images of black holes. This text offers a comprehensive and up-to-date introduction to this rapidly growing field, a convergence of vision, graphics, signal processing, and optics. It can be used as an instructional resource for computer imaging courses and as a reference for professionals. It covers the fundamentals of the field, current research and applications, and light transport techniques. The text first presents an imaging toolkit, including optics, image sensors, and illumination, and a computational toolkit, introducing modeling, mathematical tools, model-based inversion, data-driven inversion techniques, and hybrid inversion techniques. It then examines different modalities of light, focusing on the plenoptic function, which describes degrees of freedom of a light ray. Finally, the text outlines light transport techniques, describing imaging systems that obtain micron-scale 3D shape or optimize for noise-free imaging, optical computing, and non-line-of-sight imaging. Throughout, it discusses the use of computational imaging methods in a range of application areas, including smart phone photography, autonomous driving, and medical imaging. End-of-chapter exercises help put the material in context.

Author : Bastian Leibe
Publisher : Springer
Page : 909 pages
File Size : 36,65 MB
Release : 2016-09-16
Category : Computers
ISBN : 3319464876

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The eight-volume set comprising LNCS volumes 9905-9912 constitutes the refereed proceedings of the 14th European Conference on Computer Vision, ECCV 2016, held in Amsterdam, The Netherlands, in October 2016. The 415 revised papers presented were carefully reviewed and selected from 1480 submissions. The papers cover all aspects of computer vision and pattern recognition such as 3D computer vision; computational photography, sensing and display; face and gesture; low-level vision and image processing; motion and tracking; optimization methods; physics-based vision, photometry and shape-from-X; recognition: detection, categorization, indexing, matching; segmentation, grouping and shape representation; statistical methods and learning; video: events, activities and surveillance; applications. They are organized in topical sections on detection, recognition and retrieval; scene understanding; optimization; image and video processing; learning; action activity and tracking; 3D; and 9 poster sessions.

Author : Paul Suetens
Publisher : Cambridge University Press
Page : 265 pages
File Size : 11,10 MB
Release : 2009-08-06
Category : Medical
ISBN : 1139479881

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Fundamentals of Medical Imaging, second edition, is an invaluable technical introduction to each imaging modality, explaining the mathematical and physical principles and giving a clear understanding of how images are obtained and interpreted. Individual chapters cover each imaging modality – radiography, CT, MRI, nuclear medicine and ultrasound – reviewing the physics of the signal and its interaction with tissue, the image formation or reconstruction process, a discussion of image quality and equipment, clinical applications and biological effects and safety issues. Subsequent chapters review image analysis and visualization for diagnosis, treatment and surgery. New to this edition: • Appendix of questions and answers • New chapter on 3D image visualization • Advanced mathematical formulae in separate text boxes • Ancillary website containing 3D animations: www.cambridge.org/suetens • Full colour illustrations throughout Engineers, clinicians, mathematicians and physicists will find this an invaluable aid in understanding the physical principles of imaging and their clinical applications.

Author : National Research Council
Publisher : National Academies Press
Page : 60 pages
File Size : 18,38 MB
Release : 2011-04-19
Category : Political Science
ISBN : 0309215072

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The Department of Defense, through the Assembled Chemical Weapons Alternatives program, is currently in the process of constructing two full-scale pilot plants at the Pueblo Chemical Depot in Colorado and the Blue Grass Army Depot in Kentucky to destroy the last two remaining inventories of chemical weapons in the U.S. stockpile. These two storage sites together account for about 10 percent of the original U.S. chemical agent stockpile that is in the process of being destroyed in accordance with the international Chemical Weapons Convention treaty. Unlike their predecessors, these facilities will use neutralization technologies to destroy agents contained within rockets, projectiles, and mortar rounds, requiring the use of specially designed equipment. As part of its focus on safe operation of the planned facilities, the Program Manager for Assembled Chemical Weapons Alternatives asked the National Research Council (NRC) to conduct a study to offer guidance on the application of process safety metrics at the Pueblo Chemical Depot and Blue Grass Army Depot. Process safety is a disciplined framework for managing the integrity of operating systems, processes and personnel handling hazardous substances, and operations by applying good design principles, engineering, and operating practices. Process Safety Metrics at the Blue Grass and Pueblo Chemical Agent Destruction Pilot Plants discusses the use of leading and lagging process safety metrics that could provide feedback on the effectiveness of controls to mitigate risks and minimize consequences of potential incidents. The book makes several recommendations that will facilitate the development and application of process safety metrics at both sites.