Xem 1-20 trên 25 kết quả Electromagnetic imaging
  • Colour image processing is divided into two main areas: full colour and pseudo-colour processing. In the former group, the images are normally acquired with a full colour sensor such as a CCTV camera. In the second group, a colour is assigned to a specific monochrome intensity or combination of intensities. People perceive colours that actually correspond to the nature of the light reflected from the object. The electromagnetic spectrum of the chromatic light falls in the range of 400-700 nm.

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  • In the recent decades, there has been a growing interest in micro- and nanotechnology. The advances in nanotechnology give rise to new applications and new types of materials with unique electromagnetic and mechanical properties. This book is devoted to the modern methods in electrodynamics and acoustics, which have been developed to describe wave propagation in these modern materials and nanodevices.

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  • Lecture Engineering electromagnetics: Current and conductors include all of the following content: Current and current density, metallic conductors, conductor properties & boundary conditions, the method of images, semiconductors.

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  • One of the most important inventions for the development of radars was made by Christian Huelsmeyer in 1904. The German scientist demonstrated the possibility of detecting metallic objects at a distance of a few kilometres. While many basic principles of radar, namely using electromagnetic waves to measure the range, altitude, direction or speed of objects are remained up to now practically unchanged, the user requirements and technologies to realise modern radar systems are highly elaborated....

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  • This edition of Optical Metrology contains a new chapter about computerized optical processes, including digital holography and digital speckle photography. Chapter 2, on Gaussian optics, and Chapter 5, on light sources and detectors, are greatly expanded to include descriptions of standard imaging systems, light-emitting diodes and solid-state detectors. Separate new sections on optical coherence tomography, speckle correlation, the Fast Fourier Transform, temporal phase unwrapping and fibre Bragg sensors are included. Finally, a new appendix about Fourier series is given.

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  • In this book, a wide range of different topics related to analytical as well as numerical solutions of problems related to scattering, propagation, radiation, and emission in different medium are discussed. Design of several devices and their measurements aspects are introduced. Topics related to microwave region as well as Terahertz and quasi-optical region are considered. Bi-isotropic metamaterial in optical region is investigated.

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  • Since the advent of magnetic resonance (MR) imaging, systems with amagnetic field intensity of 1.5 tesla (T) have been deemed the gold standard for different clinical applications in all body areas. Ongoing advances in hardware and software have made theseMRsystems increasingly compact, powerful and versatile, leading to the development of higher magnetic field strength MRsystems (3.0 T) for use in clinical practice and for research purposes. As usually occurs with a new technology, 3.0 T MR imaging units will probably follow the same development trends in the years to come....

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  • According to classical physics the particle cannot be a wave, and the wave cannot be a particle. However, Einstein, while explaining the photoelectric effect (PEE), postulated that electromagnetic radiation has a dual wave-particle nature. He used the term photon to refer to the particle of electromagnetic radiation. He proposed a simple equation to relate the energy of the photon E to the frequency n and wavelength l of electromagnetic wave.

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  • Swiss producers of high-quality consumer products will have to be aware of the risks inherent to selling products through the multiple layers of the traditional retail sector with its small stores and the many wholesalers/distributors between producer and customer: Control over the product is easily lost, and a producer must make sure that the quality (and brand image) of his products are not compromised by inadequate handling, storage, delays in delivery etc.

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  • The second essay follows the path of the relation between saturation and emptiness by making an inventory of saturated motifs: the sky, the explosion as well as different forms of vacuum: the wandering, neutralization of the place, anonymity of the subject, emptiness of the space, inform, anguish, breakdown, instability, boredom, indifference… Bonfand shows that in Antonioni’s cinema the vacuum works as an autonomous and omnipresent force which disintegrates the system of representation of the films until saturating the image in return.

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  • Workman’s background as a trailer-maker convinced him that “you could capture the essence of a memorable film in as little as a single shot—if you chose the shot carefully enough.” (Birchard, 91) His assemblage of these “essences” places images together for broad generic or thematic reasons, as well as on the basis of simple physical resemblance (similar shots of darting eyes, people popping bubble-gum) or gag value (one clip finishing a sentence from another).

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  • Our planet is nowadays continuously monitored by powerful remote sensors operating in wide portions of the electromagnetic spectrum. Our capability of acquiring detailed information on the environment has been revolutionized by revealing its inner structure, morphology and dynamical changes. The way we now observe and study the evolution of the Earth’s status has even radically influenced our perception and conception of the world we live in.

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  • In the early theoretical models, the level of stress of caregivers was seen as a risk factor that linked elder abuse with care of an elderly relative (36, 37). While the popular image of abuse depicts a dependent victim and an overstressed caregiver, there is growing evidence that neither of these factors properly accounts for cases of abuse. Although researchers do not deny the component of stress, they tend now to look at it in a wider context in which the quality of the overall relationship is a causal factor (30, 34, 38).

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  • Customer loyalty is of utmost importance to apparel and footwear manufacturers, who would do almost anything to attract new customers while trying to keep existing customers. “In a market that bombards consumers with advertising campaigns and lifestyle and fashion messages, a brand name is a powerful weapon in these efforts” (Wagle). Brand names are becoming increasingly important to consumers as disposable income and the amount of time consumers are able to shop around is slowly diminishing.

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  • MRI at a Glance is one of a series of books that presents complex information on medical subjects in an easily accessible format. The aim is to have all information on a particular topic summarized on two facing pages of the book so that the reader has essential points at their fingertips. When the publishers approached me about including MRI in this format, I was rather sceptical.

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  • Our planet is nowadays continuously monitored by powerful remote sensors operating in wide portions of the electromagnetic spectrum. Our capability of acquiring detailed information on the environment has been revolutionized by revealing its inner structure, morphology and dynamical changes. The way we now observe and study the evolution of the Earth’s status has even radically influenced our perception and conception of the world we live in.

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  • Digitizing is the process of converting a continuos signal (such as sound or video) into distinct units that the compute or other electronic equipment can process. There are many ways to digitize things. there is the microphone, which digitizes sound. The scanner can digitize photos and other images. A digital camera is able to bring video into the computer. You can also digitize 3D objects. For that you use a 3D digitizer. These come in many different shapes and sizes. They usually use lasers to map out the 3D points and create a mesh.

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  • The Advanced Signal Processing Handbook: Theory and Implementation for Radar, Sonar, and Medical Imaging Real-Time Systems Stergios Stergiopoulos The Transform and Data Compression Handbook K.R. Rao and P.C.

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  • The purpose of The Electrical Engineering Handbook, 3rd Edition is to provide a ready reference for the practicing engineer in industry, government, and academia, as well as aid students of engineering.

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  • Medical imaging has its roots in the accidental discovery of a new class of electromagnetic radiation, X rays, by Wilhelm Conrad Roentgen in 1895. The first X-ray radiograph ever taken was of his wife’s hand, revealing a picture of the living skeleton [1]. In the subsequent decades, physicians refined the art of X-ray radiography to image the structural and physiological state of internal organs such as the stomach, intestines, lungs, heart, and brain.

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