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Total Variation Applications in Computer Vision

Total Variation Applications in Computer Vision
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Author(s): Vania Vieira Estrela (Universidade Federal Fluminense, Brazil), Hermes Aguiar Magalhães (Universidade Federal de Minas Gerais, Brazil)and Osamu Saotome (InstitutoTecnologico de Aeronautica, Brazil)
Copyright: 2018
Pages: 28
Source title: Computer Vision: Concepts, Methodologies, Tools, and Applications
Source Author(s)/Editor(s): Information Resources Management Association (USA)
DOI: 10.4018/978-1-5225-5204-8.ch021

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Abstract

The objectives of this chapter are: (i) to introduce a concise overview of regularization; (ii) to define and to explain the role of a particular type of regularization called total variation norm (TV-norm) in computer vision tasks; (iii) to set up a brief discussion on the mathematical background of TV methods; and (iv) to establish a relationship between models and a few existing methods to solve problems cast as TV-norm. For the most part, image-processing algorithms blur the edges of the estimated images, however TV regularization preserves the edges with no prior information on the observed and the original images. The regularization scalar parameter λ controls the amount of regularization allowed and it is essential to obtain a high-quality regularized output. A wide-ranging review of several ways to put into practice TV regularization as well as its advantages and limitations are discussed.

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