Download or read book Digital Signal Processing Techniques for Optical Coherence Tomography written by Desmond Christopher Adler and published by . This book was released on 2004 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) process for removing speckle noise while maintaining feature sharpness.
Download or read book Real time Digital Signal Processing based Optical Coherence Tomography and Optical Doppler Tomography written by Alexander Werner Schaefer and published by . This book was released on 2001 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Interference Effects and Signal Processing Techniques in Optical Coherence Tomography written by Christopher David Russell and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Coherence Tomography written by Wolfgang Drexler and published by Springer Science & Business Media. This book was released on 2008-12-10 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is the optical analog of ultrasound imaging and is emerging as a powerful imaging technique that enables non-invasive, in vivo, high resolution, cross-sectional imaging in biological tissue. This book introduces OCT technology and applications not only from an optical and technological viewpoint, but also from biomedical and clinical perspectives. The chapters are written by leading research groups, in a style comprehensible to a broad audience.
Download or read book Digital Signal Processing For High speed Optical Communication written by Jianjun Yu and published by World Scientific Publishing Company. This book was released on 2018-03-09 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an increasing tendency to integrate optical communication with wireless communication to satisfy continuously emerging (new) data communication demands. Thus, optical-wireless-integrated access networks and transmission systems, as well as LED-based visible light communication are attracting ever increasing research interest. Digital signal processing (DSP) is one new technology for optical transmission. As such this book is designed to pave the way to the better understanding of the deployment of DSP in optical fiber communication systems.Digital Signal Processing for High-Speed Optical Communication covers a wide area of DSP topics in optical communications, and describes state-of-the-art digital signal processing techniques for high-speed optical communication. In this book, numerous advanced digital signal processing techniques aiming at the promotion of the capacity increase and performance improvement of optical or optical-wireless communication systems and networks are presented and explained. Coverage includes new technologies, optical filter with MLSE, and new pre-coding and pre-equalization applicable to single-carrier and multi-carrier, direct-detection and coherent-detection optical commutation systems and networks.
Download or read book Minimizing the Effects of Distortion and Noise in Fiber optic Communications and Interferometric Imaging Through Digital Signal Processing written by William A. Ling and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation we will study the effects of distortion and noise in fiber-optic communications and interferometric imaging and methods to reduce their impact. In the area of fiber-optic communications, we will explore the two most economically significant applications: intra-data center links and optical access networks. The motivation for this study is the imminent need for optical links to undergo a large-scale upgrade in capacity to meet the needs of exponentially-growing Internet traffic. As these markets are high-volume and low-cost, we favor techniques which emphasize digital signal processing (DSP) over optical signal processing. The ability to transition to heavily DSP-based architectures is now possible due to recent development of commercial CMOS digital-to-analog and analog-to-digital converters with up to 65 Gsample/s conversion rates. However, such ultra-high-speed converters have limitations in resolution, and so we will investigate methods to compensate for this deficiency. In particular, we will introduce a new method of spectral reshaping to greatly increase a transmitter's signal-to-noise ratio when limited by a low-resolution digital-to-analog converter. Next we will discuss a novel architecture which enables electronic dispersion compensation in optical access networks using minimal opto-electronic components. We will present simulation and experimental measurement of record bit rates in a single polarization and wavelength using a receiver based on single-photodiode detection. The third topic within fiber-optic communications relates to intra-data center communications. For this application, chromatic dispersion is minimal and thus direct modulation of distributed feedback lasers is preferred, as it eliminates the need for both a laser and a separate high-speed modulator. However, direct modulation is characterized by significant nonlinearity in the conversion of drive current to optical intensity. We will show how this effect can be mitigated through the use of novel quadrature amplitude modulation constellations in a fully-digital implementation. Finally, we will discuss the impacts of noise and non-ideal detection in an interferometric imaging system based on the concept of phase-sensitive spectral-domain optical coherence tomography. We will analyze the impacts of noise and digital processing on the sensitivity of such a system in measuring sub-nanometer features.
Download or read book High Resolution Imaging in Microscopy and Ophthalmology written by Josef F. Bille and published by Springer. This book was released on 2019-08-13 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book provides a comprehensive overview of the application of the newest laser and microscope/ophthalmoscope technology in the field of high resolution imaging in microscopy and ophthalmology. Starting by describing High-Resolution 3D Light Microscopy with STED and RESOLFT, the book goes on to cover retinal and anterior segment imaging and image-guided treatment and also discusses the development of adaptive optics in vision science and ophthalmology. Using an interdisciplinary approach, the reader will learn about the latest developments and most up to date technology in the field and how these translate to a medical setting. High Resolution Imaging in Microscopy and Ophthalmology – New Frontiers in Biomedical Optics has been written by leading experts in the field and offers insights on engineering, biology, and medicine, thus being a valuable addition for scientists, engineers, and clinicians with technical and medical interest who would like to understand the equipment, the applications and the medical/biological background. Lastly, this book is dedicated to the memory of Dr. Gerhard Zinser, co-founder of Heidelberg Engineering GmbH, a scientist, a husband, a brother, a colleague, and a friend.
Download or read book Optical Coherence Tomography written by Mark E. Brezinski and published by Elsevier. This book was released on 2006-08-25 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Coherence Tomography gives a broad treatment of the subject which will include 1)the optics, science, and physics needed to understand the technology 2) a description of applications with a critical look at how the technology will successfully address actual clinical need, and 3) a discussion of delivery of OCT to the patient, FDA approval and comparisons with available competing technologies. The required mathematical rigor will be present where needed but be presented in such a way that it will not prevent non-scientists and non-engineers from gaining a basic understanding of OCT and the applications as well as the issues of bringing the technology to the market. - Optical Coherence Tomography is a new medical high-resolution imaging technology which offers distinct advantages over current medical imaging technologies and is attracting a large number of researchers. - Provides non-scientists and non-engineers basic understanding of Optical Coherence Tomography applications and issues.
Download or read book Image Processing in Optical Coherence Tomography Using Matlab written by Robert Koprowski and published by Robert Koprowski. This book was released on 2011 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the results of the creation of methods for ophthalmologists support in OCT images automated analysis. These methods, like the application developed on their basis, are used during routine examinations carried out in hospital. The monograph comprises proposals of new and also of known algorithms, modified by authors, for image analysis and processing, presented on the basis of example of Matlab environment with Image Processing tools. The results are not only obtained fully automatically, but also repeatable, providing doctors with quantitative information on the degree of pathology occurring in the patient. In this case the anterior and posterior eye segment is analysed, e.g. the measurement of the filtration angle or individual layers thickness. To introduce the Readers to subtleties related to the implementation of selected fragments of algorithms, the notation of some of them in the Matlab environment has been given. The presented source code is shown only in the form of example of implementable selected algorithm. In no way we impose here the method of resolution on the Reader and we only provide the confirmation of a possibility of its practical implementation.
Download or read book Handbook of Multimedia Information Security Techniques and Applications written by Amit Kumar Singh and published by Springer. This book was released on 2019-07-19 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is organized under three major parts. The first part of this handbook deals with multimedia security for emerging applications. The chapters include basic concepts of multimedia tools and applications, biological and behavioral biometrics, effective multimedia encryption and secure watermarking techniques for emerging applications, an adaptive face identification approach for android mobile devices, and multimedia using chaotic and perceptual hashing function. The second part of this handbook focuses on multimedia processing for various potential applications. The chapter includes a detail survey of image processing based automated glaucoma detection techniques and role of de-noising, recent study of dictionary learning based image reconstruction techniques for analyzing the big medical data, brief introduction of quantum image processing and it applications, a segmentation-less efficient Alzheimer detection approach, object recognition, image enhancements and de-noising techniques for emerging applications, improved performance of image compression approach, and automated detection of eye related diseases using digital image processing. The third part of this handbook introduces multimedia applications. The chapter includes the extensive survey on the role of multimedia in medicine and multimedia forensics classification, a finger based authentication system for e-health security, analysis of recently developed deep learning techniques for emotion and activity recognition. Further, the book introduce a case study on change of ECG according to time for user identification, role of multimedia in big data, cloud computing, the Internet of things (IoT) and blockchain environment in detail for real life applications. This handbook targets researchers, policy makers, programmers and industry professionals in creating new knowledge for developing efficient techniques/framework for multimedia applications. Advanced level students studying computer science, specifically security and multimedia will find this book useful as a reference.
Download or read book Real time Photon noise Limited Optical Coherence Tomography Based on Pixel level Analog Signal Processing written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the development of a CMOS smart imager for real-time optical coherency tomography (OCT). OCT, a measuring technique based on low-coherence interferometry, allows the acquisition of three-dimensional pictures of discontinuities in the refractive index of the sample. Due to the achieved depth resolution in the micrometer range, it has gained a lot of impact not only for many biomedical but also for industrial applications over the last few years. OCT allows the determination of surfaces as well as the acquisition of tomographic images of transparent and turbid objects with an outstanding depth resolution in the sub-micrometer scale over a depth range of up to several millimeters. The goal of this thesis was the realization of a very fast, robust 3D OCT system performing at close to the physical limit. A multi-channel approach has been chosen and a CMOS smart imager has been developed as they key component of the total system that includes an appropriate electrical, optical, and mechanical system. This system proves that by the use of parallel optical coherence tomography (pOCT) in combination with custom designed CMOS image sensors, real-time imaging with compact devices is realizable. For time domain (TD- ) OCT, the reference path length of the interferometer is varied and a simultaneous amplitude demodulation of the optical signal generates the depth image. The cross-sectional or volumetric image of a conventional TD-OCT system is generated by combining many laterally shifted one-dimensional depth scans throughout the object. Therefore, very fast reference path scanners and one or two translation stages are required. This results in a non-negligible mechanical system complexity. In pOCT, the translation scanners are replaced by image-forming optics and a two-dimensional image sensor. This step reduces the depth scan speed greatly and renders 3D image acquisition in some tens of milliseconds possible. On the other hand, the image sensor requiremen.
Download or read book Holoscopy written by Dierck Hillmann and published by Springer. This book was released on 2014-07-08 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holoscopy is a new tomographic imaging modality that combines techniques of digital holography with Fourier-domain optical coherence tomography (FD-OCT). Dierck Hillmann gives a theoretical introduction to the mathematics and physics of holoscopy and develops an efficient numerical reconstruction procedure. Compared to FD-OCT, holoscopy provides unique advantages by enabling tomographic imaging without a limited depth of focus, but results in an increased numerical cost for reconstruction. In further chapters, the author introduces techniques for FD-OCT that are relevant to holoscopy as well. He demonstrates and compares numerical reconstruction methods for FD-OCT and shows how motion and dispersion artifacts in FD-OCT can be numerically compensated.
Download or read book A Real time Optical Coherence Tomography System Utilizing an Acquisition and Signal Processing Architecture Implemented on a Field Programmable Gate Array written by Tyler Stephen Ralston and published by . This book was released on 2004 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Coherence Tomography and Its Non medical Applications written by Michael Wang and published by BoD – Books on Demand. This book was released on 2020-05-27 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is a promising non-invasive non-contact 3D imaging technique that can be used to evaluate and inspect material surfaces, multilayer polymer films, fiber coils, and coatings. OCT can be used for the examination of cultural heritage objects and 3D imaging of microstructures. With subsurface 3D fingerprint imaging capability, OCT could be a valuable tool for enhancing security in biometric applications. OCT can also be used for the evaluation of fastener flushness for improving aerodynamic performance of high-speed aircraft. More and more OCT non-medical applications are emerging. In this book, we present some recent advancements in OCT technology and non-medical applications.
Download or read book Optical Coherence Tomography and Coherence Techniques written by and published by . This book was released on 2007 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Real time Photon noise Limited Optical Coherence Tomography Based on Pixel level Analog Signal Processing written by Stephan Beer and published by . This book was released on 2006 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anterior Posterior Segment OCT Current Technology Future Applications written by Ashok Garg and published by JP Medical Ltd. This book was released on 2014-01-30 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is a non-invasive imaging test that uses light waves to take cross-section pictures of the retina, the light-sensitive tissue lining the back of the eye (geteyesmart.org). Anterior segment OCT covers structures in front of the vitreous humour – iris, cornea, lens and ciliary body. Posterior segment OCT includes the anterior hyaloid membrane and all the structures behind it – vitreous humour, retina, choroid and optic nerve. This book is a comprehensive guide to the use of OCT in anterior and posterior segment surgery. Beginning with an introduction to the technique, the following chapters examine OCT for numerous different procedures including for corneal disorders, glaucoma, diabetic retinopathy, keratoconus and refractive surgery. The accompanying interactive DVD ROM demonstrates intraoperative use of OCT for different surgical procedures. Key points Comprehensive guide to OCT in anterior and posterior segment surgery Covers numerous procedures for different parts of the eye Interactive DVD ROM demonstrates intraoperative use of OCT Includes nearly 270 clinical photographs, diagrams and tables
