Invariants And Pictures: Low-dimensional Topology And Combinatorial Group Theory
Invariants And Pictures: Low-dimensional Topology And Combinatorial Group Theory

Author: Vassily Olegovich Manturov

Publisher: World Scientific

Published: 2020-04-22

Total Pages: 387

ISBN-13: 9811220131

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This book contains an in-depth overview of the current state of the recently emerged and rapidly growing theory of Gnk groups, picture-valued invariants, and braids for arbitrary manifolds. Equivalence relations arising in low-dimensional topology and combinatorial group theory inevitably lead to the study of invariants, and good invariants should be strong and apparent. An interesting case of such invariants is picture-valued invariants, whose values are not algebraic objects, but geometrical constructions, like graphs or polyhedra.In 2015, V O Manturov defined a two-parametric family of groups Gnk and formulated the following principle: if dynamical systems describing a motion of n particles possess a nice codimension 1 property governed by exactly k particles then these dynamical systems possess topological invariants valued in Gnk.The book is devoted to various realisations and generalisations of this principle in the broad sense. The groups Gnk have many epimorphisms onto free products of cyclic groups; hence, invariants constructed from them are powerful enough and easy to compare. However, this construction does not work when we try to deal with points on a 2-surface, since there may be infinitely many geodesics passing through two points. That leads to the notion of another family of groups — Γnk, which give rise to braids on arbitrary manifolds yielding invariants of arbitrary manifolds.

Moments and Moment Invariants in Pattern Recognition
Moments and Moment Invariants in Pattern Recognition

Author: Jan Flusser

Publisher: John Wiley & Sons

Published: 2009-11-04

Total Pages: 312

ISBN-13: 9780470684764

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Moments as projections of an image’s intensity onto a proper polynomial basis can be applied to many different aspects of image processing. These include invariant pattern recognition, image normalization, image registration, focus/ defocus measurement, and watermarking. This book presents a survey of both recent and traditional image analysis and pattern recognition methods, based on image moments, and offers new concepts of invariants to linear filtering and implicit invariants. In addition to the theory, attention is paid to efficient algorithms for moment computation in a discrete domain, and to computational aspects of orthogonal moments. The authors also illustrate the theory through practical examples, demonstrating moment invariants in real applications across computer vision, remote sensing and medical imaging. Key features: Presents a systematic review of the basic definitions and properties of moments covering geometric moments and complex moments. Considers invariants to traditional transforms – translation, rotation, scaling, and affine transform - from a new point of view, which offers new possibilities of designing optimal sets of invariants. Reviews and extends a recent field of invariants with respect to convolution/blurring. Introduces implicit moment invariants as a tool for recognizing elastically deformed objects. Compares various classes of orthogonal moments (Legendre, Zernike, Fourier-Mellin, Chebyshev, among others) and demonstrates their application to image reconstruction from moments. Offers comprehensive advice on the construction of various invariants illustrated with practical examples. Includes an accompanying website providing efficient numerical algorithms for moment computation and for constructing invariants of various kinds, with about 250 slides suitable for a graduate university course. Moments and Moment Invariants in Pattern Recognition is ideal for researchers and engineers involved in pattern recognition in medical imaging, remote sensing, robotics and computer vision. Post graduate students in image processing and pattern recognition will also find the book of interest.

Representations and Invariants of the Classical Groups
Representations and Invariants of the Classical Groups

Author: Roe Goodman

Publisher: Cambridge University Press

Published: 2000-01-13

Total Pages: 708

ISBN-13: 9780521663489

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More than half a century has passed since Weyl's 'The Classical Groups' gave a unified picture of invariant theory. This book presents an updated version of this theory together with many of the important recent developments. As a text for those new to the area, this book provides an introduction to the structure and finite-dimensional representation theory of the complex classical groups that requires only an abstract algebra course as a prerequisite. The more advanced reader will find an introduction to the structure and representations of complex reductive algebraic groups and their compact real forms. This book will also serve as a reference for the main results on tensor and polynomial invariants and the finite-dimensional representation theory of the classical groups. It will appeal to researchers in mathematics, statistics, physics and chemistry whose work involves symmetry groups, representation theory, invariant theory and algebraic group theory.

2D and 3D Image Analysis by Moments
2D and 3D Image Analysis by Moments

Author: Jan Flusser

Publisher: John Wiley & Sons

Published: 2016-11-16

Total Pages: 557

ISBN-13: 1119039371

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Presents recent significant and rapid development in the field of 2D and 3D image analysis 2D and 3D Image Analysis by Moments, is a unique compendium of moment-based image analysis which includes traditional methods and also reflects the latest development of the field. The book presents a survey of 2D and 3D moment invariants with respect to similarity and affine spatial transformations and to image blurring and smoothing by various filters. The book comprehensively describes the mathematical background and theorems about the invariants but a large part is also devoted to practical usage of moments. Applications from various fields of computer vision, remote sensing, medical imaging, image retrieval, watermarking, and forensic analysis are demonstrated. Attention is also paid to efficient algorithms of moment computation. Key features: Presents a systematic overview of moment-based features used in 2D and 3D image analysis. Demonstrates invariant properties of moments with respect to various spatial and intensity transformations. Reviews and compares several orthogonal polynomials and respective moments. Describes efficient numerical algorithms for moment computation. It is a "classroom ready" textbook with a self-contained introduction to classifier design. The accompanying website contains around 300 lecture slides, Matlab codes, complete lists of the invariants, test images, and other supplementary material. 2D and 3D Image Analysis by Moments, is ideal for mathematicians, computer scientists, engineers, software developers, and Ph.D students involved in image analysis and recognition. Due to the addition of two introductory chapters on classifier design, the book may also serve as a self-contained textbook for graduate university courses on object recognition.

The Perception of Pictures
The Perception of Pictures

Author: Margaret A. Hagen

Publisher: Academic Press

Published: 2014-05-10

Total Pages: 381

ISBN-13: 1483259560

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Durer's Devices: Beyond the Projective Model of Pictures is a collection of papers that discusses the nature of picture making and perception. One paper presents a perceptual theory of pictorial representation in which cultural and historical options in styles of depiction that appear to be different are actually closely related perceptually. Another paper discusses pictorial functions and perceptual structures including pictorial representation, perceptual theory, flat canvass, and the deep world. One paper suggests that perception can be more a matter of information "make up" than "pick up." Light becomes somewhat informative and the eye, correspondingly, becomes less or more presumptive. Another paper notes that human vision is transformed by our modes of representation, that image formation can be essentially incomplete, false, or misleading (primarily as regards dramatic performance and pictorial representation). One paper makes three claims that: (1) the blind have untapped depiction abilities; (2) haptics, involving the sense of touch, have an intuitive sense of perspective; and (3) depiction is perceptual based on graphic elements and pictorial configurations. The collection is suitable for psychologists, physiologists, psychophysicists, and researchers in human perception or phenomenology.

Moment Maps and Combinatorial Invariants of Hamiltonian Tn-spaces
Moment Maps and Combinatorial Invariants of Hamiltonian Tn-spaces

Author: Victor Guillemin

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 158

ISBN-13: 1461202698

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The action of a compact Lie group, G, on a compact sympletic manifold gives rise to some remarkable combinatorial invariants. The simplest and most interesting of these is the moment polytopes, a convex polyhedron which sits inside the dual of the Lie algebra of G. One of the main goals of this monograph is to describe what kinds of geometric information are encoded in this polytope. This book is addressed to researchers and can be used as a semester text.

Handbook of Image Processing and Computer Vision
Handbook of Image Processing and Computer Vision

Author: Arcangelo Distante

Publisher: Springer Nature

Published: 2020-05-28

Total Pages: 507

ISBN-13: 303038148X

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Across three volumes, the Handbook of Image Processing and Computer Vision presents a comprehensive review of the full range of topics that comprise the field of computer vision, from the acquisition of signals and formation of images, to learning techniques for scene understanding. The authoritative insights presented within cover all aspects of the sensory subsystem required by an intelligent system to perceive the environment and act autonomously. Volume 1 (From Energy to Image) examines the formation, properties, and enhancement of a digital image. Topics and features: • Describes the fundamental processes in the field of artificial vision that enable the formation of digital images from light energy • Covers light propagation, color perception, optical systems, and the analog-to-digital conversion of the signal • Discusses the information recorded in a digital image, and the image processing algorithms that can improve the visual qualities of the image • Reviews boundary extraction algorithms, key linear and geometric transformations, and techniques for image restoration • Presents a selection of different image segmentation algorithms, and of widely-used algorithms for the automatic detection of points of interest • Examines important algorithms for object recognition, texture analysis, 3D reconstruction, motion analysis, and camera calibration • Provides an introduction to four significant types of neural network, namely RBF, SOM, Hopfield, and deep neural networks This all-encompassing survey offers a complete reference for all students, researchers, and practitioners involved in developing intelligent machine vision systems. The work is also an invaluable resource for professionals within the IT/software and electronics industries involved in machine vision, imaging, and artificial intelligence. Dr. Cosimo Distante is a Research Scientist in Computer Vision and Pattern Recognition in the Institute of Applied Sciences and Intelligent Systems (ISAI) at the Italian National Research Council (CNR). Dr. Arcangelo Distante is a researcher and the former Director of the Institute of Intelligent Systems for Automation (ISSIA) at the CNR. His research interests are in the fields of Computer Vision, Pattern Recognition, Machine Learning, and Neural Computation.

Varieties of Realism
Varieties of Realism

Author: Margaret A. Hagen

Publisher: CUP Archive

Published: 1986-05-31

Total Pages: 356

ISBN-13: 9780521313292

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Varieties of Realism argues that it is not possible to represent the layout of objects and surfaces in space outside the dictates of formal visual geometry, the geometry of natural perspective. The book examines most of the world's coherent representational art styles, both in terms of the geometry of their creation and in terms of their perceptual effects on the viewer. A lucid exposition of modern geometrical principles and relations, accessible to the nonmathematical reader, is followed by an analysis of all known styles as variants of natural perspective, as true varieties of realism. Delineating the physical and mechanical constraints that determine the act of visual representation in painting and drawing, the author traces the intimate relations among seemingly distant styles and considers the kind of perceptual information about the world each can carry. Margaret Hagen is a perceptual psychologist with an ecological point of view. Her rigorous but readable presentation of visual theory and research offers provocative new insights into the connections among vision, geometry, and art.