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Author: Frédéric Cao
Publisher: Springer Science & Business Media
ISBN: 9783540004028
Category : Mathematics
Languages : en
Pages : 204
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Book Description
In image processing, "motions by curvature" provide an efficient way to smooth curves representing the boundaries of objects. In such a motion, each point of the curve moves, at any instant, with a normal velocity equal to a function of the curvature at this point. This book is a rigorous and self-contained exposition of the techniques of "motion by curvature". The approach is axiomatic and formulated in terms of geometric invariance with respect to the position of the observer. This is translated into mathematical terms, and the author develops the approach of Olver, Sapiro and Tannenbaum, which classifies all curve evolution equations. He then draws a complete parallel with another axiomatic approach using level-set methods: this leads to generalized curvature motions. Finally, novel, and very accurate, numerical schemes are proposed allowing one to compute the solution of highly degenerate evolution equations in a completely invariant way. The convergence of this scheme is also proved.
Author: Frédéric Cao
Publisher: Springer Science & Business Media
ISBN: 9783540004028
Category : Mathematics
Languages : en
Pages : 204
Get Book Here
Book Description
In image processing, "motions by curvature" provide an efficient way to smooth curves representing the boundaries of objects. In such a motion, each point of the curve moves, at any instant, with a normal velocity equal to a function of the curvature at this point. This book is a rigorous and self-contained exposition of the techniques of "motion by curvature". The approach is axiomatic and formulated in terms of geometric invariance with respect to the position of the observer. This is translated into mathematical terms, and the author develops the approach of Olver, Sapiro and Tannenbaum, which classifies all curve evolution equations. He then draws a complete parallel with another axiomatic approach using level-set methods: this leads to generalized curvature motions. Finally, novel, and very accurate, numerical schemes are proposed allowing one to compute the solution of highly degenerate evolution equations in a completely invariant way. The convergence of this scheme is also proved.
Author: Marco Bohr
Publisher: Routledge
ISBN: 9781138216037
Category : Art
Languages : en
Pages : 154
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Book Description
This volume addresses the evolution of the visual in digital communities, offering a multidisciplinary discussion of the ways in which images are circulated in digital communities, the meanings that are attached to them and the implications they have for notions of identity, memory, gender, cultural belonging and political action. Contributors focus on the political efficacy of the image in digital communities, as well as the representation of the digital self in order to offer a fresh perspective on the role of digital images in the creation and promotion of new forms of resistance, agency and identity within visual cultures.
Author: Yves Meyer
Publisher: American Mathematical Soc.
ISBN: 9780821829202
Category : Computers
Languages : en
Pages : 138
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Book Description
Image compression, the Navier-Stokes equations, and detection of gravitational waves are three seemingly unrelated scientific problems that, remarkably, can be studied from one perspective. The notion that unifies the three problems is that of ``oscillating patterns'', which are present in many natural images, help to explain nonlinear equations, and are pivotal in studying chirps and frequency-modulated signals. The first chapter of this book considers image processing, moreprecisely algorithms of image compression and denoising. This research is motivated in particular by the new standard for compression of still images known as JPEG-2000. The second chapter has new results on the Navier-Stokes and other nonlinear evolution equations. Frequency-modulated signals and theiruse in the detection of gravitational waves are covered in the final chapter. In the book, the author describes both what the oscillating patterns are and the mathematics necessary for their analysis. It turns out that this mathematics involves new properties of various Besov-type function spaces and leads to many deep results, including new generalizations of famous Gagliardo-Nirenberg and Poincare inequalities. This book is based on the ``Dean Jacqueline B. Lewis Memorial Lectures'' given bythe author at Rutgers University. It can be used either as a textbook in studying applications of wavelets to image processing or as a supplementary resource for studying nonlinear evolution equations or frequency-modulated signals. Most of the material in the book did not appear previously inmonograph literature.
Author: Anne Baring
Publisher: Penguin UK
ISBN: 0141941405
Category : Social Science
Languages : en
Pages : 798
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Book Description
A comprehensive, scholarly accessible study, in which the authors draw upon poetry and mythology, art and literature, archaeology and psychology to show how the myth of the goddess has been lost from our formal Judeo-Christian images of the divine. They explain what happened to the goddess, when, and how she was excluded from western culture, and the implications of this loss.
Author: Nick Hopwood
Publisher: University of Chicago Press
ISBN: 022604694X
Category : Art
Languages : en
Pages : 397
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Book Description
Emphasizing the changes worked by circulation and copying, interpretation and debate, this book uses the case to explore how pictures succeed and fail, gain acceptance and spark controversy. It reveals how embryonic development was made a process that we can see, compare, and discuss, and how copying - usually dismissed as unoriginal
Author: Charissa N. Terranova
Publisher: Bloomsbury Publishing
ISBN: 0857728075
Category : Art
Languages : en
Pages : 336
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Book Description
In this groundbreaking book, Charissa Terranova unearths a forgotten narrative of modernism, which charts the influence that biology, General Systems Theory and cybernetics had on art in the twentieth century. From kinetic and interactive art to early computer art and installations spanning an entire city, she shows that the digital image was a rich and expansive artistic medium of modernism. This book links the emergence of the digital image to the dispersion of biocentric aesthetic philosophies developed by Bauhaus pedagogue Laszlo Moholy-Nagy, from 1920s Berlin to the Massachusetts Institute of Technology in the 1970s. It uncovers seminal but overlooked references to biology, the organism, feedback loops, emotions and the Gestalt, along with an intricate genealogy of related thinkers across disciplines. Terranova interprets anew major art movements such as the Bauhaus, Op Art and Experiments in Art and Technology (E.A.T.), by referencing contemporary insights from architects, embryologists, electrical engineers and computer scientists, among others.This book reveals the complex connections between visual culture, science and technology that comprise the deep history of twentieth-century art.
Author: Julia Voss
Publisher: Yale University Press
ISBN: 030016310X
Category : Science
Languages : en
Pages : 351
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Book Description
"Not only does Voss weave about these images a story on the development and presentation of Darwin's theory, she also addresses the history of Victorian illustration, the role of images in science, the technologies of production, and the relationship between specimen, words, and images."--Jacket.
Author: Catherine Barr
Publisher: Frances Lincoln Children's Books
ISBN: 9781786033420
Category :
Languages : en
Pages : 40
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Book Description
At first, nothing lived on Earth. It was a noisy, hot, scary place. Choking gas exploded from volcanoes and oceans of lava bubbled around the globe... Then in the deep, dark ocean, something amazing happened. This is an exciting and dramatic story about how life began and developed on Planet Earth, written especially for younger children. The authors explain how the first living cell was created, and how the cells multiply and create jellyfish and worms, and then fish with bendy necks, which drag themselves out of the water into swampy forests. They tell the story of the biggest creatures that have ever walked on land - the dinosaurs. Long after that, hairy creatures who have babies, not eggs, take over, stand on two legs and spread around the world, some of them living through cataclysmic events such as ice ages and volcanic eruptions. Everyone living today is related to these survivors. With delightful illustrations including lots of detail and humour, all carefully researched and checked, this book shows the development of life on Earth in a truly accessible and simple way. CLICK HERE to download Teachers' Notes specially written by the authors, Catherine Barr and Steve Williams, to assist teachers and librarians in the promotion and teaching of The Story of Lifein schools and to help foster a love of good books, literature and reading in children.
Author: Jonathan Emmett
Publisher:
ISBN: 9781910959664
Category : Evolution (Biology)
Languages : en
Pages : 32
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Book Description
View more details of this book at www.walkerbooks.com.au
Author: Cara A. Finnegan
Publisher: University of Illinois Press
ISBN: 0252052692
Category : Photography
Languages : en
Pages : 378
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Book Description
Defining the Chief Executive via flash powder and selfie sticks Lincoln’s somber portraits. Lyndon Johnson’s swearing in. George W. Bush’s reaction to learning about the 9/11 attacks. Photography plays an indelible role in how we remember and define American presidents. Throughout history, presidents have actively participated in all aspects of photography, not only by sitting for photos but by taking and consuming them. Cara A. Finnegan ventures from a newly-discovered daguerreotype of John Quincy Adams to Barack Obama’s selfies to tell the stories of how presidents have participated in the medium’s transformative moments. As she shows, technological developments not only changed photography, but introduced new visual values that influence how we judge an image. At the same time, presidential photographs—as representations of leaders who symbolized the nation—sparked public debate on these values and their implications. An original journey through political history, Photographic Presidents reveals the intertwined evolution of an American institution and a medium that continues to define it.
