{"id":19127,"date":"2018-03-09T09:08:00","date_gmt":"2018-03-09T09:08:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/algoritmos-de-compresion-basados-en-transformada-wavelet-aplicacion-en-mamografa%c2%ada-digital\/"},"modified":"2018-03-09T09:08:00","modified_gmt":"2018-03-09T09:08:00","slug":"algoritmos-de-compresion-basados-en-transformada-wavelet-aplicacion-en-mamografa%c2%ada-digital","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/algoritmos-de-compresion-basados-en-transformada-wavelet-aplicacion-en-mamografa%c2%ada-digital\/","title":{"rendered":"Algoritmos de compresi\u00f3n basados en transformada wavelet: aplicaci\u00f3n en mamograf\u00edadigital"},"content":{"rendered":"<h2>Tesis doctoral de <strong> M\u00f3nica Penedo Ojea <\/strong><\/h2>\n<p>Introducci\u00f3n  en ciertas modalidades de imagen m\u00e9dica, como es el caso de la mamograf\u00eda, son esenciales una buena resoluci\u00f3n espacial y de contraste para no perder estructuras de peque\u00f1o tama\u00f1o o poco contrastadas, como las microcalcificaciones o las masas. El elevado coste asociado al almacenamiento y transmisi\u00f3n de estas im\u00e1genes de gran formato provoca un retardo en la total implantaci\u00f3n de la tecnolog\u00eda digital en mamograf\u00eda. La transformada wavelet surge como una t\u00e9cnica eficaz para el desarrollo de m\u00e9todos de comprensi\u00f3n de im\u00e1genes que aporten una posible soluci\u00f3n a esta situaci\u00f3n. Con la aparici\u00f3n de las t\u00e9cnicas de comprensi\u00f3n en regiones, existe la posibilidad de comprimir la regi\u00f3n mamaria en una mamograf\u00eda, despreciando la informaci\u00f3n asociada al fondo mamogr\u00e1fico, carente de inter\u00e9s diagn\u00f3stico.  objetivo  desarrollar un m\u00e9todo de comprensi\u00f3n irreversible para mamograf\u00edas digitales utilizando transformada wavelet que comprima \u00fanicamente la regi\u00f3n mamaria, y evaluar la detecci\u00f3n de c\u00famulos de microcalcificaciones y masas en mamograf\u00edas comprimidas con dicho m\u00e9todo. Evaluar el nuevo est\u00e1ndar de comprensi\u00f3n de im\u00e1genes digitales, jpeg 2000, en la compresi\u00f3n con p\u00e9rdidas de mamograf\u00edas digitales y compararlo con los resultados obtenidos con el m\u00e9todo desarrollado.  m\u00e9todos  mediante un m\u00e9todo de segmentaci\u00f3n de la mama, se ha podido determinar un contorno cerrado que delimite pefectamente la regi\u00f3n a comprimir. En los p\u00edxeles pertenecientes a la mama se ha aplicado la transformada wavelet discreta en regiones (twdr) 2-d. Realizando las extensiones correctas en los extremos de los segmentos 1-d dentro de la mama y el submuestreo apropiado tras el filtrado, es posible mantener la propiedad de reconstrucci\u00f3n perfecta y preservar la correlaci\u00f3n espacial entre coeficientes dentro de la mama. para la codificaci\u00f3n de los coeficientes se ha realizado una extensi\u00f3n de los algoritmos<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Algoritmos de compresi\u00f3n basados en transformada wavelet: aplicaci\u00f3n en mamograf\u00edadigital<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Algoritmos de compresi\u00f3n basados en transformada wavelet: aplicaci\u00f3n en mamograf\u00edadigital <\/li>\n<li><strong>Autor:<\/strong>\u00a0 M\u00f3nica Penedo Ojea <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/09\/2002<\/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>Pablo Garc\u00eda Tahoces<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Hern\u00e1ndez sande <\/li>\n<li>Manuel P\u00e9rez cota (vocal)<\/li>\n<li>julio Esclarin monreal (vocal)<\/li>\n<li> Lado touri\u00f1o m. Jos\u00e9 (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de M\u00f3nica Penedo Ojea Introducci\u00f3n en ciertas modalidades de imagen m\u00e9dica, como es el caso de la mamograf\u00eda, [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[1191,8036,1890,155,35,9,16880,346,8159,13880,126,977],"tags":[3060,58911,58912,46465,58909,58910],"class_list":["post-19127","post","type-post","status-publish","format-standard","hentry","category-analisis-numerico","category-biofisica","category-ciencia-de-los-ordenadores","category-ciencias-clinicas","category-ciencias-de-la-vida","category-ciencias-medicas","category-construccion-de-algoritmos","category-diagnostico-por-imagen","category-fisica-medica","category-informatica","category-matematicas","category-santiago-de-compostela","tag-carlos-hernandez-sande","tag-julio-esclarin-monreal","tag-lado-tourino-m-jose","tag-manuel-perez-cota","tag-monica-penedo-ojea","tag-pablo-garcia-tahoces"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/19127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=19127"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/19127\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=19127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=19127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=19127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}