{"id":53606,"date":"2018-03-09T22:41:20","date_gmt":"2018-03-09T22:41:20","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/optimization-and-generalization-of-lifting-schemes-application-to-lossless-image-compression\/"},"modified":"2018-03-09T22:41:20","modified_gmt":"2018-03-09T22:41:20","slug":"optimization-and-generalization-of-lifting-schemes-application-to-lossless-image-compression","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/tecnologia-de-las-telecomunicaciones\/optimization-and-generalization-of-lifting-schemes-application-to-lossless-image-compression\/","title":{"rendered":"Optimization and generalization of lifting schemes: application to lossless image compression"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Joel Sole Rojals <\/strong><\/h2>\n<p>Esta tesis aborda el problema de la descomposici\u00f3n multi-resoluci\u00f3n, tema clave en procesado del se\u00f1al que ha llevado estos \u00faltimos a\u00f1os a la creaci\u00f3n del sobresaliente est\u00e1ndar jpeg2000 de compresi\u00f3n de im\u00e1genes. Jpeg2000 incorpora una serie de funcionalidades muy interesantes debido b\u00e1sicamente a la transformada wavelet discreta y al codificador entr\u00f3pico ebcot.  la transformada wavelet realiza una descomposici\u00f3n multi-resoluci\u00f3n que decorrela la se\u00f1al separando la informaci\u00f3n en un conjunto de bandas frecuenciales \u00fatiles para la posterior codificaci\u00f3n. En jpeg2000, la descomposici\u00f3n se calcula mediante el esquema lifting, tambi\u00e9n llamado wavelet de segunda generaci\u00f3n. La integraci\u00f3n del esquema lifting en el est\u00e1ndar ha centrado el inter\u00e9s de muchos investigadores en esta herramienta. Recientemente, han aparecido numerosos trabajos proponiendo modificaciones y mejoras del lifting, as\u00ed como su inclusi\u00f3n en nuevos algoritmos de codificaci\u00f3n de im\u00e1genes.  la tesis doctoral sigue esta l\u00ednea de investigaci\u00f3n. Se estudia el lifting, se hacen propuestas dentro del esquema y sus posibilidades se exploran. Se ha fijado la compresi\u00f3n de im\u00e1genes como el principal objetivo para la creaci\u00f3n de nuevas transformadas wavelet, que se eval\u00faan en su mayor parte mediante la codificaci\u00f3n de la se\u00f1al transformada con ebcot o spiht. Dentro de este contexto, el trabajo diverge en dos caminos distintos, el lineal y el no lineal.  la construcci\u00f3n de filtros lifting lineales se basa en la idea de interpolaci\u00f3n cuadr\u00e1tica y la restricci\u00f3n lineal subyacente de los coeficientes wavelet. El resultado es un marco de trabajo flexible que permite la creaci\u00f3n de transformadas con distintos criterios y adaptables a la estad\u00edstica de la imagen.  la parte no lineal tiene sus fundamentos en el esquema lifting adaptativo, del cu\u00e1l se ofrece un extenso an\u00e1lisis y como consecuencia se propone una generalizaci\u00f3n del lifting. Su versi\u00f3n discreta se desa<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Optimization and generalization of lifting schemes: application to lossless image compression<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Optimization and generalization of lifting schemes: application to lossless image compression <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Joel Sole Rojals <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 29\/06\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Philippe Salembier Clairon<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ferran Marques acosta <\/li>\n<li>Luis Salgado \u00e1lvarez de sotomayor (vocal)<\/li>\n<li>joan Serra sagrista (vocal)<\/li>\n<li>gemma Piella fenoy (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Joel Sole Rojals Esta tesis aborda el problema de la descomposici\u00f3n multi-resoluci\u00f3n, tema clave en procesado del [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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