Extracting knowledge from images through feature extraction is a topic of paramount importance for the Image Processing and Computer Vision communities. Within this general objective, this thesis focuses on the combination of the intensity and texture information, encoded by means of the local structure tensor (LST), for the segmentation of images. The LST is a well-stablished tool for the representation of oriented textures, and its incorporation to the segmentation process has reported to improve the segmentation performance. However, its combined use with the intensity is a complex issue that must be tackled carefully. This dissertation explores various alternatives to achieve this combination, and besides studies the problem of the balance of both sources of information. Within a level set framework, the segmentation is first performed in the tensor domain based on the definition of novel LST tensor variants that incorporate intensity information. A different approach is also considered based on a common energy minimization framework that allows the usage of both the insensity and the LST respecting their most adequate representation forms and suitable metrics. Besides, an adaptive procedure for the determination of the weighting parameters is proposed that takes into account the respective discriminant power of both features. The segmentation of tensor fields is also addressed in this dissertation. In this direction, an extension to the state-of-the-art approaches for the segmentation of tensor data has been derived which is based on the modeling of tensor data using mixtures of Gaussians. The application of this scheme can be devoted to the combined use of the intensity and texture as introduced before, as well as for the stand-alone segmentation of tensor fields. The methods proposed in this dissertation are applied to three medical image applications. The first two are performed using both the intensity and the LST in a combined approach as proposed in this thesis. Specifically, the segmentation of hand bones from radiographs is first addressed, related to the problem of the automated determination of the skeletal age in children. Next, the endocardium of the left ventricle is extractred from 3D+T cardiac MRI images. The third application is devoted to the segmentation of the corpus callosum from diffusion tensor MRI, and is thus an application of the Gaussian mixtures model for tensor field segmentation.
This book provides basic information about the political values, attitudes and behaviors of Mexican-, Puerto Rican-, and Cuban-origin populations in the United States. It describes the extent to which U.S. citizens of Hispanic origins hold particular views and participate in specific activities.
This title is the first in a series covering all the French military aviation crashes of the post-war era. The book details all the crashes sustained by the French Air Force, French Navy, and all other French governmental agencies, with each crash examined in detail.
As a modern day Sherlock Holmes, Deacon Sherlock Holmes Garcia unlocks the life lessons of the Ten Commandments in Robert Willmann's debut novel, The 10. Through the author's unique writing style, you'll find yourself engaged in the Ten Commandments in ways that are powerful and profound, causing inner reflection through the creative tales told.
Cuban independence arrived formally on May 20, 1902, with the raising of the Cuban flag in Havana - a properly orchestrated and orderly inauguration of the new republic. But something had gone awry. Republican reality fell far short of the separatist ideal. In an unusually powerful book that will appeal to the general reader as well as to the specialist, Louis A. Perez, Jr., recounts the story of the critical years when Cuba won its independence from Spain only to fall in the American orbit.The last quarter of the nineteenth century found Cuba enmeshed in a complicated colonial environment, tied to the declining Spanish empire yet economically dependent on the newly ascendant United States. Rebellion against Spain had involved two generations of Cubans in major but fruitless wars. By careful examination of the social and economic changes occurring in Cuba, and of the political content of the separatist movement, the author argues that the successful insurrection of 1895-98 was not simply the last of the New World rebellions against European colonialism. It was the first of a genre that would become increasingly familiar in the twentieth century: a guerrilla war of national liberation aspiring to the transformation of society.The third player in the drama was the United States. For almost a century, the United States had pursuedthe acquistion of Cuba. Stepping in when Spain was defeated, the Americans occupied Cuba ostensibly to prepare it for independence but instead deliberately created institutions that restored the social hierarchy and guaranteed political and economic dependence. It was not the last time the U.S. intervention would thwart the Cuban revolutionary impulse.
From the Pharaohs to Fanon, Dictionary of African Biography provides a comprehensive overview of the lives of the men and women who shaped Africa's history. Unprecedented in scale, DAB covers the whole continent from Tunisia to South Africa, from Sierra Leone to Somalia. It also encompasses the full scope of history from Queen Hatsheput of Egypt (1490-1468 BC) and Hannibal, the military commander and strategist of Carthage (243-183 BC), to Kwame Nkrumah of Ghana (1909-1972), Miriam Makeba and Nelson Mandela of South Africa (1918 -).
The Americanization of Louis By Louis Gutierrez This memoir chronicles the author’s childhood growing up during the Great Depression and World War II. Louis Gutierrez was born to immigrants from Spain in Tampa, Florida, in 1931. Growing up in the Tampa suburb of Ybor City offered him a unique community of Spanish, Italian, and Cuban immigrants. These families did not try to impose their culture or language on others, and while maintaining their traditions and language, they nevertheless felt it was important to learn English and become part of the melting pot that made all Americans free of labels. The Americanization of Louis answers the question of what it was that his family and others did to assimilate and become Americans, of which some recent arrivals differed and seemed to resist.
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