Author: Lingwen Zeng
Publisher:
ISBN: 1838805990
Category :
Languages : en
Pages : 119

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Author:
Publisher: National Academies Press
ISBN:
Category : Color vision
Languages : en
Pages : 128

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Author: Asit Kumar Datta
Publisher: CRC Press
ISBN: 148222657X
Category : Computers
Languages : en
Pages : 353

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Face detection and recognition are the nonintrusive biometrics of choice in many security applications. Examples of their use include border control, driver's license issuance, law enforcement investigations, and physical access control.Face Detection and Recognition: Theory and Practice elaborates on and explains the theory and practice of face de

Author: Rein-Lien Hsu
Publisher:
ISBN:
Category : Biometry
Languages : en
Pages : 400

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Face recognition has received substantial attention from researchers in biometrics, computer vision, pattern recognition, and cognitive psychology communities because of the increased attention being devoted to security, man-machine communication, content-based image retrieval, and image/video coding. We have proposed two automated recognition paradigms to advance face recognition technology. Three major tasks involved in face recognition systems are: (i) face detection, (ii) face modeling, and (iii) face matching. We have developed a face detection algorithm for color images in the presence of various lighting conditions as well as complex backgrounds. Our detection method first corrects the color bias by a lighting compensation technique that automatically estimates the parameters of reference white for color correction. We overcame the difficulty of detecting the low-luma and high-luma skin tones by applying a nonlinear transformation to the Y CbCr color space. Our method generates face candidates based on the spatial arrangement of detected skin patches. We constructed eye, mouth, and face boundary maps to verify each face candidate. Experimental results demonstrate successful detection of faces with different sizes, color, position, scale, orientation, 3D pose, and expression in several photo collections. 3D human face models augment the appearance-based face recognition approaches to assist face recognition under the illumination and head pose variations. For the two proposed recognition paradigms, we have designed two methods for modeling human faces based on (i) a generic 3D face model and an individual's facial measurements of shape and texture captured in the frontal view, and (ii) alignment of a semantic face graph, derived from a generic 3D face model, onto a frontal face image.

Author: M. Henini
Publisher: Elsevier
ISBN: 9781856173889
Category : Science
Languages : en
Pages : 536

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Introduction -- Comparison of Photon and Thermal Detectors Performance -- GaAs/AIGaAs Based Quantum Well Intra-red Photodetector Focal Plane Arrays -- GaInAs(P) Based Qwips on GaAs, InP and Si Substrates for Focal Plane Arrays -- InAs/(Galn)Sb Superlattices: A Promising Material System for Infra-red Detection -- GaSb/InAs Superlattices for Infra-red FPAs -- MCT Properties, Growth Methods and Characterization -- HgCdTe 2D Arrays -- Technology and Performance Limits -- Status of HgCdTe MBE Technology -- Silicon Infra-red Focal Plane Arrays -- PolySiGe Uncooled Microbolometers for Thermal Infra-red Detection -- Infra-red Silicon/Germanium Detectors -- Fundamentals of Spin Filtering in Ferromagnetic Metals with Application to Spin Sensors.

Author: Bhuvan Unhelkar
Publisher: Springer Nature
ISBN: 9819959748
Category : Technology & Engineering
Languages : en
Pages : 782

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This volume comprises the select peer-reviewed proceedings of the International Conference on Advances and Applications of Artificial Intelligence and Machine Learning 2022 (ICAAAIML 2022). It aims to provide a comprehensive and broad-spectrum picture of state-of-the-art research and development in the areas of artificial intelligence, machine learning, deep learning, and their advanced applications in computer vision and blockchain. It also covers research in core concepts of computers, intelligent system design and deployment, real-time systems, WSN, sensors and sensor nodes, software engineering, image processing, and cloud computing. This volume will provide a valuable resource for those in academia and industry.

Author: Miroslov Vecera
Publisher: Springer Science & Business Media
ISBN: 1468418335
Category : Science
Languages : en
Pages : 417

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The American edition of our monograph is not a mere translation of the Czech edition, which appeared some five years ago. We have had to respect the fact that even such a short period has sufficed for progress in this field, and that the field of application of methods of organic analysis has widened. We have therefore revised a number of chapters in Part 1, the general part of the monograph-mainly those devoted to chromatographic methods, which have been extended and complemented by methods of thin-layer chromatography and electrophoresis. The chapters on the theory of color reactions and on analytical literature have also been extended; the chapter on spectral methods has been extended by including the use of proton magnetic resonance in organic analysis, and the list of references has been enlarged by adding books of importance for organic analysis. In Part 2, the part dealing specifically with various elements and chemical groups, we have extended the chapters on solubility and on acids and bases. The methods for the detection and identification of given classes of compounds have also been supplemented by references to recent papers.

Author: Albert Ernest Leach
Publisher:
ISBN:
Category : Food
Languages : en
Pages : 1202

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Author: Б. Зено
Publisher: Litres
ISBN: 5041072949
Category : Technology & Engineering
Languages : en
Pages :

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В реальных изображениях лиц большие визуальные вариации, такие как различия в выражении лица, его позиции, разный масштаб и освещение, наличие преград перед лицами и другие, вызывают трудности при отличии лица от фона изображения. В результате возникают области изображений, которые неправильно распознаются как лица (ошибки первого рода), тогда как эффективность алгоритмов распознавания лиц характеризуется низким числом таких ошибок, высокой скоростью обнаружения лиц и высокой скоростью обработки изображений. Таким образом, чтобы уменьшить число описанных областей, вместо того, чтобы разрабатывать точный алгоритм обнаружения лиц, который требует больших временных затрат на работу, после первичного обнаружения лиц будет добавлен этап их валидации. В настоящей статье предлагается новый быстрый метод валидации лиц. Он состоит из двух этапов: первый – определение кожи с использованием метода анализа значений YCbCr-цвета; второй шаг – обнаружение глаз и рта с использованием каскадного подхода. На втором этапе область лица-кандидата делится на две перекрывающиеся области, одна для модели обнаружения глаз, а другая для модели обнаружения рта. Алгоритм обнаружения лиц, основанный на методе опорных векторов, использовался для сравнения с предлагаемым решением. Результаты экспериментов на наборе данных FDDB показали лучшую производительность предлагаемого метода (время валидации 2 мс по сравнению с 500 мс у алгоритма, основанного на методе опорных векторов) при схожем числе ошибок первого рода.

Author: Miguel Sales Dias
Publisher: Springer Science & Business Media
ISBN: 3540928642
Category : Computers
Languages : en
Pages : 294

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This book constitutes the thoroughly refereed post-proceedings of the 7th International Workshop on Gesture-Based Human-Computer Interaction and Simulation, GW 2007, held in Lisbon, Portugal, in May 2007. The 31 revised papers presented were carefully selected from 53 submissions. The papers are organized in topical sections on analysis and synthesis of gesture; theoretical aspects of gestural communication and interaction; vision-based gesture recognition; sign language processing; gesturing with tangible interfaces and in virtual and augmented reality; gesture for music and performing arts; gesture for therapy and rehabilitation; and gesture in Mobile computing and usability studies.