Download or read book Segmentation d images bas e sur les statistiques de rangs des niveaux de gris written by Duyan Bi and published by . This book was released on 1997 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans ce mémoire, nous présentons de nouvelles méthodes de segmentation d'images basées sur les statistiques de rangs des niveaux de gris. A travers cette étude, nous avons mis en évidence l'efficacité de la caractérisation des régions à l'aide des statistiques de rangs des niveaux de gris tant pour les régions que pour la discrimination de textures. Dans un premier temps, nous utilisons celles-ci pour la détection de contours. En considérant les contours comme des transitions fortes de niveaux de gris entre régions, on base la détection sur une modélisation du changement des niveaux de gris par rapport à leurs rangs dans une fenêtre. Les contours sont finalement positionnés grâce à une nouvelle méthode de localisation s'appuyant sur une modélisation géométrique locale d'un contour dans une fenêtre de 3 x 3 pixels. Les résultats de la détection sur des images réelles ont montré l'efficacité de notre approche. Dans un deuxième temps, nous avons pris en compte la relation qui lie les positions spatiales et les rangs des niveaux de gris des pixels dans un voisinage. Cela permet de faire ressortir la structure locale de la distribution de niveaux de gris dans l'image. Nous décrivons ensuite la texture en calculant les fréquences d'apparition de ces structures de base dans une région. Cette nouvelle description de texture, permet la mise en oeuvre de la discrimination et la segmentation de textures. La comparaison de cette méthode avec celles des matrices d'occurrences, de l'énergie de texture, et de la transformation de Gabor a montré la supériorité de la méthode proposée.
Download or read book Segmentation d images basee sur les statistiques de rangs des niveaux de gris written by Duyan Bi and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Utilisation des concepts d analyse statistique des donn es et de connexit pour la segmentation des images written by Marie-Claire Douchez and published by . This book was released on 1993 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un moyen efficace pour condenser l'information visuelle contenue dans une scène consiste à segmenter l'image numérisée. Notre travail qui s'inscrit dans cette optique, consiste à classer les points-image entre les classes associées aux différents types de régions homogènes constituant l'image analysée. Cependant, les conditions de réussite d'une telle procédure de segmentation reposent pour une grande part sur l'uniformité spatiale de l'illumination de la scène observée. Ainsi, nous avons développé une nouvelle approche de prétraitement des images. Son principe, basé sur un schéma itératif de modélisation des variations spatiales basses fréquences de la luminance, permet d'obtenir une image représentative des variations d'illumination. Après soustraction de ces variations estimées de l'image originale, l'image résultante peut être segmentée par un seuil global. Dans un contexte non supervisé, nous proposons ensuite une approche statistique de classification des points-image. Avec pour unique hypothèse la normalité de la distribution des niveaux de gris des points associés à chaque classe à identifier, nous utilisons les concepts mathématiques de base de la classification statistique des données afin d'identifier les différentes distributions qui composent la distribution des niveaux de gris des points de l'image. Notre approche a été généralisée dans le cas d'une caractérisation multidimensionnelle des points-image. Cette approche statistique s'avère cependant limitée du fait du manque de la prise en compte des relations spatiales existantes entre les points-images. Pour remédier à cet inconvénient, nous proposons finalement une approche par fusions hiérarchiques des régions qui utilise ces propriétés spatiales pour segmenter les images. Cette étude, validée par des expérimentations sur des images synthétiques, débouche sur des résultats satisfaisants dans le cas d'images réelles.
Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Download or read book Agricultural English written by Georgeta Raţă and published by Cambridge Scholars Publishing. This book was released on 2012-04-25 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural English is a collection of essays on the English of Agriculture. The approach is a linguistic one: the different aspects of the English used in the field of agriculture (agricultural practices, agricultural systems) and in some fields related to agriculture (agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, zoology) are analysed from a morphological (combination, derivation), syntactical (nominal phrases, verbal phrases), lexical and lexicographical, semantic (homonymy, semantic fields, synonymy, terminology), pragmatic (academic discourse, idiom, metaphor), etymological (etymon, Latin heritage), and contrastive (English–Croatian, English–French, English–German, English–Romanian, Romanian–English) points of view. The book will appeal to agriculturists, animal breeders, professors, researchers, students, and translators from Croatian-, English-, French-, German-, and Romanian-speaking countries, active in their own countries or abroad. The types of academic readership it would appeal to include academic teaching staff, researchers and students in the fields of agriculture and related fields – agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, and zoology.
Download or read book Biodiversity and Sustainable Development written by Rabindra Nath Pati and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the First Global Summit on Sustainable Development and Biodiversity, held at Raipur during 7-9 February 2009.
Download or read book CIKM 13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.
Download or read book American Religion written by Mark A. A. Chaves and published by Princeton University Press. This book was released on 2017-08-29 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most authoritative resource on religious trends in America—now fully updated Most Americans say they believe in God, and more than a third say they attend religious services every week. Yet studies show that people do not really go to church as often as they claim, and it is not always clear what they mean when they tell pollsters they believe in God or pray. American Religion presents the best and most up-to-date information about religious trends in the United States, in a succinct and accessible manner. This sourcebook provides essential information about key developments in American religion since 1972, and is the first major resource of its kind to appear in more than two decades. Mark Chaves looks at trends in diversity, belief, involvement, congregational life, leadership, liberal Protestant decline, and polarization. He draws on two important surveys: the General Social Survey, an ongoing survey of Americans' changing attitudes and behaviors, begun in 1972; and the National Congregations Study, a survey of American religious congregations across the religious spectrum. Chaves finds that American religious life has seen much continuity in recent decades, but also much change. He challenges the popular notion that religion is witnessing a resurgence in the United States—in fact, traditional belief and practice is either stable or declining. Chaves examines why the decline in liberal Protestant denominations has been accompanied by the spread of liberal Protestant attitudes about religious and social tolerance, how confidence in religious institutions has declined more than confidence in secular institutions, and a host of other crucial trends. Now with updated data and a new preface by the author, this revised edition provides essential information about key developments in American religion since 1972, plainly showing that religiosity is declining in America.
Download or read book Mekka in the Latter Part of the 19th Century written by C. Snouck Hurgronje and published by BRILL. This book was released on 2006-12-01 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 1884-1885, Christiaan Snouck Hurgronje stayed in Mecca. He became intimately acquainted with the daily life of the Meccans and the thousands of pilgrims from all over the world. This volume deals with social and family life, funeral customs and marriage. It is a unique insight in one the most important places in islamic culture. With a new foreword by Jan Just Witkam
Download or read book Toward Category Level Object Recognition written by Jean Ponce and published by Springer. This book was released on 2007-01-25 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a post-event proceedings volume and contains selected papers based on presentations given, and vivid discussions held, during two workshops held in Taormina in 2003 and 2004. The 30 thoroughly revised papers presented are organized in the following topical sections: recognition of specific objects, recognition of object categories, recognition of object categories with geometric relations, and joint recognition and segmentation.
Download or read book Monitoring soils in the environment with remote sensing and gis written by Richard Escadafal and published by IRD Orstom. This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: ISSS congress remote sensing
Download or read book Congregation Community written by Nancy Tatom Ammerman and published by Rutgers University Press. This book was released on 1997 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why do some religious institutions decline in the face of racial integration whilst others grow? How do congregations deal with economic distress? This study of congregations in the face of community transformation includes stories of over 20 congregations in nine communities across America.
Download or read book Congregations in America written by Mark Chaves and published by Harvard University Press. This book was released on 2009-07-01 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: More Americans belong to religious congregations than to any other kind of voluntary association. What these vast numbers amount to--what people are doing in the over 300,000 churches, synagogues, mosques, and temples in the United States--is a question that resonates through every quarter of American society, particularly in these times of "faith-based initiatives," "moral majorities," and militant fundamentalism. And it is a question answered in depth and in detail in Congregations in America. Drawing on the 1998 National Congregations Study--the first systematic study of its kind--as well as a broad range of quantitative, qualitative, and historical evidence, this book provides a comprehensive overview of the most significant form of collective religious expression in American society: local congregations. Among its more surprising findings, Congregations in America reveals that, despite the media focus on the political and social activities of religious groups, the arts are actually far more central to the workings of congregations. Here we see how, far from emphasizing the pursuit of charity or justice through social services or politics, congregations mainly traffic in ritual, knowledge, and beauty through the cultural activities of worship, religious education, and the arts. Along with clarifying--and debunking--arguments on both sides of the debate over faith-based initiatives, the information presented here comprises a unique and invaluable resource, answering previously unanswerable questions about the size, nature, make-up, finances, activities, and proclivities of these organizations at the very center of American life.
Download or read book Investing in Rural Extension written by Gwyn Evans Jones and published by . This book was released on 1986 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Vision written by Andrew Blake and published by MIT Press (MA). This book was released on 1992 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active Vision explores important themes emerging from the active vision paradigm, which has only recently become an established area of machine vision. In four parts the contributions look in turn at tracking, control of vision heads, geometric and task planning, and architectures and applications, presenting research that marks a turning point for both the tasks and the processes of computer vision. The eighteen chapters in Active Vision draw on traditional work in computer vision over the last two decades, particularly in the use of concepts of geometrical modeling and optical flow; however, they also concentrate on relatively new areas such as control theory, recursive statistical filtering, and dynamical modeling. Active Vision documents a change in emphasis, one that is based on the premise that an observer (human or computer) may be able to understand a visual environment more effectively and efficiently if the sensor interacts with that environment, moving through and around it, culling information selectively, and analyzing visual sensory data purposefully in order to answer specific queries posed by the observer. This method is in marked contrast to the more conventional, passive approach to computer vision where the camera is supposed to take in the whole scene, attempting to make sense of all that it sees. Andrew Blake is Lecturer in Engineering Science at the University of Oxford Alan Yuille is Associate Professor in the Division of Applied Sciences at Harvard University.
Download or read book Alien Tongues written by Elizabeth Klosty Beaujour and published by . This book was released on 1989 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Saints of the Atlas written by Ernest Gellner and published by ACLS History E-Book Project. This book was released on 2008-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
