Real-Time Obstacle Avoidance Using Central Flow Divergence and Peripheral Flow (Classic Reprint) PDF Download
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Author: David Coombs
Publisher: Forgotten Books
ISBN: 9780265924839
Category : Science
Languages : en
Pages : 26
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Book Description
Excerpt from Real-Time Obstacle Avoidance Using Central Flow Divergence and Peripheral Flow The lure of using motion vision as a fundamental element in the perception of space drives this ejfort to use flow features as the sole cues for robot mobility. Real-time estimates of image flow and flow divergence provide the robot's sense of space. The robot steers down a conceptual corridor; comparing left and right peripheral flows. Large central flow divergence warns the robot of impending col lisions at dead ends. When this occurs, the robot turns around and resumes wandering. Behavior is generated by directly using flow-based information in the 2-d image sequence; no 3-d reconstruction is attempted. Active mechanical gaze stabilization simplifies the visual interpretation problems by reducing camera rota tion. By combining corridor following and dead-end deflection, the robot has wan dered around the lab at 30 cm/s for as long as 20 minutes without collision. The ability to support this behavior in real-time with current equipment promises expanded capabilities as computational power increases in the future. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: David Coombs
Publisher: Forgotten Books
ISBN: 9780265924839
Category : Science
Languages : en
Pages : 26
Get Book Here
Book Description
Excerpt from Real-Time Obstacle Avoidance Using Central Flow Divergence and Peripheral Flow The lure of using motion vision as a fundamental element in the perception of space drives this ejfort to use flow features as the sole cues for robot mobility. Real-time estimates of image flow and flow divergence provide the robot's sense of space. The robot steers down a conceptual corridor; comparing left and right peripheral flows. Large central flow divergence warns the robot of impending col lisions at dead ends. When this occurs, the robot turns around and resumes wandering. Behavior is generated by directly using flow-based information in the 2-d image sequence; no 3-d reconstruction is attempted. Active mechanical gaze stabilization simplifies the visual interpretation problems by reducing camera rota tion. By combining corridor following and dead-end deflection, the robot has wan dered around the lab at 30 cm/s for as long as 20 minutes without collision. The ability to support this behavior in real-time with current equipment promises expanded capabilities as computational power increases in the future. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: David Coombs
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Phillip A. Laplante
Publisher: Wiley-IEEE Press
ISBN:
Category : Computers
Languages : en
Pages : 392
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Book Description
"IEEE Press is pleased to bring you this Second Edition of Phillip A. Laplante's best-selling and widely-acclaimed practical guide to building real-time systems. This book is essential for improved system designs, faster computation, better insights, and ultimate cost savings. Unlike any other book in the field, REAL-TIME SYSTEMS DESIGN AND ANALYSIS provides a holistic, systems-based approach that is devised to help engineers write problem-solving software. Laplante's no-nonsense guide to real-time system design features practical coverage of: Related technologies and their histories Time-saving tips * Hands-on instructions Pascal code Insights into decreasing ramp-up times and more!"
Author: Kevin Lynch
Publisher: MIT Press
ISBN: 9780262620017
Category : Architecture
Languages : en
Pages : 212
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Book Description
The classic work on the evaluation of city form. What does the city's form actually mean to the people who live there? What can the city planner do to make the city's image more vivid and memorable to the city dweller? To answer these questions, Mr. Lynch, supported by studies of Los Angeles, Boston, and Jersey City, formulates a new criterion—imageability—and shows its potential value as a guide for the building and rebuilding of cities. The wide scope of this study leads to an original and vital method for the evaluation of city form. The architect, the planner, and certainly the city dweller will all want to read this book.
Author: Peter Watts
Publisher: Macmillan
ISBN: 1429955198
Category : Fiction
Languages : en
Pages : 388
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Book Description
Hugo and Shirley Jackson award-winning Peter Watts stands on the cutting edge of hard SF with his acclaimed novel, Blindsight Two months since the stars fell... Two months of silence, while a world held its breath. Now some half-derelict space probe, sparking fitfully past Neptune's orbit, hears a whisper from the edge of the solar system: a faint signal sweeping the cosmos like a lighthouse beam. Whatever's out there isn't talking to us. It's talking to some distant star, perhaps. Or perhaps to something closer, something en route. So who do you send to force introductions with unknown and unknowable alien intellect that doesn't wish to be met? You send a linguist with multiple personalities, her brain surgically partitioned into separate, sentient processing cores. You send a biologist so radically interfaced with machinery that he sees x-rays and tastes ultrasound. You send a pacifist warrior in the faint hope she won't be needed. You send a monster to command them all, an extinct hominid predator once called vampire, recalled from the grave with the voodoo of recombinant genetics and the blood of sociopaths. And you send a synthesist—an informational topologist with half his mind gone—as an interface between here and there. Pray they can be trusted with the fate of a world. They may be more alien than the thing they've been sent to find. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.
Author: Anol Bhattacherjee
Publisher: CreateSpace
ISBN: 9781475146127
Category : Science
Languages : en
Pages : 156
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Book Description
This book is designed to introduce doctoral and graduate students to the process of conducting scientific research in the social sciences, business, education, public health, and related disciplines. It is a one-stop, comprehensive, and compact source for foundational concepts in behavioral research, and can serve as a stand-alone text or as a supplement to research readings in any doctoral seminar or research methods class. This book is currently used as a research text at universities on six continents and will shortly be available in nine different languages.
Author: Mihaly Csikszentmihalyi
Publisher: Springer
ISBN: 9401790884
Category : Psychology
Languages : en
Pages : 313
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Book Description
The second volume in the collected works of Mihaly Csikszentmihalyi covers about thirty years of Csikszentmihalyi‘s work on three main and interconnected areas of study: attention, flow and positive psychology. Describing attention as psychic energy and in the footsteps of William James, Csikszentmihalyi explores the allocation of attention, the when and where and the amount of attention humans pay to tasks and the role of attention in creating ‘experiences’, or ordered patterns of information. Taking into account information processing theories and attempts at quantifying people’s investment, the chapters deal with such topics as time budgets and the development and use of the Experience Sampling Method of collecting data on attention in everyday life. Following the chapters on attention and reflecting Csikszentmihalyi’s branching out into sociology and anthropology, there are chapters on the topic of adult play and leisure and connected to that, on flow, a concept formulated and developed by Csikszentmihalyi. Flow has become a popular concept in business and management around the world and research on the concept continues to flourish. Finally, this volume contains articles that stem from Csikszentmihalyi’s connection with Martin Seligman; they deal with concepts and theories, as well as with the development and short history, of the field and the “movement” of positive psychology.
Author: Babin, Marcel
Publisher: UNESCO
ISBN: 9231040421
Category : Nature
Languages : en
Pages : 880
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Book Description
The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Author: Johnny Saldana
Publisher: SAGE
ISBN: 1446200124
Category : Reference
Languages : en
Pages : 282
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Book Description
The Coding Manual for Qualitative Researchers is unique in providing, in one volume, an in-depth guide to each of the multiple approaches available for coding qualitative data. In total, 29 different approaches to coding are covered, ranging in complexity from beginner to advanced level and covering the full range of types of qualitative data from interview transcripts to field notes. For each approach profiled, Johnny Saldaña discusses the method’s origins in the professional literature, a description of the method, recommendations for practical applications, and a clearly illustrated example.
Author: General Giulio Douhet
Publisher: Pickle Partners Publishing
ISBN: 1782898522
Category : History
Languages : en
Pages : 620
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Book Description
In the pantheon of air power spokesmen, Giulio Douhet holds center stage. His writings, more often cited than perhaps actually read, appear as excerpts and aphorisms in the writings of numerous other air power spokesmen, advocates-and critics. Though a highly controversial figure, the very controversy that surrounds him offers to us a testimonial of the value and depth of his work, and the need for airmen today to become familiar with his thought. The progressive development of air power to the point where, today, it is more correct to refer to aerospace power has not outdated the notions of Douhet in the slightest In fact, in many ways, the kinds of technological capabilities that we enjoy as a global air power provider attest to the breadth of his vision. Douhet, together with Hugh “Boom” Trenchard of Great Britain and William “Billy” Mitchell of the United States, is justly recognized as one of the three great spokesmen of the early air power era. This reprint is offered in the spirit of continuing the dialogue that Douhet himself so perceptively began with the first edition of this book, published in 1921. Readers may well find much that they disagree with in this book, but also much that is of enduring value. The vital necessity of Douhet’s central vision-that command of the air is all important in modern warfare-has been proven throughout the history of wars in this century, from the fighting over the Somme to the air war over Kuwait and Iraq.
