{"id":21782,"date":"2021-03-12T13:38:41","date_gmt":"2021-03-12T19:38:41","guid":{"rendered":"https:\/\/otech.uaeh.edu.mx\/noti\/?p=21782"},"modified":"2021-03-12T13:39:06","modified_gmt":"2021-03-12T19:39:06","slug":"este-nuevo-algoritmo-detecta-deepfakes-el-94-de-las-veces-fijandose-en-como-la-luz-se-refleja-en-los-ojos","status":"publish","type":"post","link":"https:\/\/otech.uaeh.edu.mx\/noti\/tech\/este-nuevo-algoritmo-detecta-deepfakes-el-94-de-las-veces-fijandose-en-como-la-luz-se-refleja-en-los-ojos\/","title":{"rendered":"Este nuevo algoritmo detecta deepfakes el 94 % de las veces fij\u00e1ndose en c\u00f3mo la luz se refleja en los ojos"},"content":{"rendered":"

Una nueva herramienta de inteligencia artificial proporciona una forma sorprendentemente sencilla de detectar si lo que estamos viendo es un deepfake o se trata de una imagen real: analizar c\u00f3mo la luz se refleja en los ojos.<\/span><\/span><\/span><\/span><\/p>\n

El sistema\u00a0 <\/span><\/span><\/span><\/span>ha sido desarrollado <\/span><\/span><\/span><\/span> \u00a0por investigadores inform\u00e1ticos de la Universidad de Buffalo. <\/span><\/span><\/span>En pruebas con fotos de estilo retrato, la herramienta\u00a0 <\/span><\/span><\/span><\/span>fue 94% efectiva en la detecci\u00f3n de im\u00e1genes Deepfake<\/span><\/span><\/span><\/span><\/strong> .<\/span><\/span><\/span><\/span><\/p>\n

An\u00e1lisis de las c\u00f3rneas<\/span><\/span><\/span><\/span><\/h2>\n

Un\u00a0 <\/span><\/span><\/span><\/span>Deepfake<\/span><\/span><\/span><\/span><\/strong> \u00a0(acr\u00f3nimo del ingl\u00e9s formado por las palabras fake, falsificaci\u00f3n, y deep learning, aprendizaje profundo) es una t\u00e9cnica de inteligencia artificial que permite editar v\u00eddeos falsos de personas que aparentemente son reales, utilizando para ello algoritmos de aprendizaje no supervisados, conocidos en espa\u00f1ol como\u00a0 <\/span><\/span><\/span><\/span>RGAs<\/span><\/span><\/span><\/span><\/strong> \u00a0(Red generativa antag\u00f3nica), y v\u00eddeos o im\u00e1genes ya existentes. <\/span><\/span><\/span>Muchas veces, el ojo humano puede ser enga\u00f1ado, por ello se ha desarrollado este nuevo algoritmo para identificarlos.<\/span><\/span><\/span><\/span><\/p>\n

\n
\"Sin<\/div>\n<\/div>\n

El sistema expone las falsificaciones\u00a0 <\/span><\/span><\/span><\/span>analizando las c\u00f3rneas<\/span><\/span><\/span><\/span><\/strong> , que tienen una superficie similar a un espejo y que genera patrones reflectantes cuando se ilumina con luz.<\/span><\/span><\/span><\/span><\/p>\n

En una foto de un rostro real tomada con una c\u00e1mara, el reflejo de los dos ojos ser\u00e1 similar porque est\u00e1n viendo lo mismo. <\/span><\/span><\/span>Pero las im\u00e1genes Deepfake generalmente no logran capturar con precisi\u00f3n esta semejanza, mostrando diferentes formas geom\u00e9tricas o ubicaciones no coincidentes de los reflejos.<\/span><\/span><\/span><\/span><\/p>\n

\n
\"Sin<\/div>\n<\/div>\n

El sistema de inteligencia artificial busca estas discrepancias\u00a0 <\/span><\/span><\/span><\/span>trazando un rostro y analizando la luz reflejada en cada globo ocular<\/span><\/span><\/span><\/span><\/strong> . <\/span><\/span><\/span>Genera una puntuaci\u00f3n que sirve como m\u00e9trica de similitud. <\/span><\/span><\/span>Cuanto menor sea la puntuaci\u00f3n, m\u00e1s probable es que el rostro sea un Deepfake.<\/span><\/span><\/span><\/span><\/p>\n

Por supuesto, el sistema tiene limitaciones: es eficaz \u00fanicamente en im\u00e1genes de retratos. <\/span><\/span><\/span>Si el rostro de la imagen no est\u00e1 mirando a la c\u00e1mara,\u00a0 <\/span><\/span><\/span><\/span>es probable que el sistema produzca falsos positivos<\/span><\/span><\/span><\/span><\/strong> . <\/span><\/span><\/span>Tambi\u00e9n los deepfakes m\u00e1s sosfisticados, donde hay un trabajo de procesado posterior para evitar discrepancias en los reflejos de los ojos, quedar\u00e1n a salvo del escrutinio de este nuevo algoritmo.<\/span><\/span><\/span><\/span><\/p>\n

Fuente:<\/span><\/span><\/p>\n

Parra, S. (2021b, 12 de marzo). <\/span>Este nuevo algoritmo detecta deepfakes el 94% de las veces fij\u00e1ndose en c\u00f3mo la luz se refleja en los ojos. <\/span>Recuperado 12 de marzo de 2021, de https:\/\/www.xatakaciencia.com\/tecnologia\/este-nuevo-algoritmo-detecta-deepfakes-94-veces-fijandose-como-luz-se-refleja-ojos<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Una nueva herramienta de inteligencia artificial proporciona una forma sorprendentemente sencilla de detectar si lo que estamos viendo es un deepfake o se trata de una imagen real: analizar c\u00f3mo la luz se refleja en los ojos.<\/p>\n","protected":false},"author":1,"featured_media":21783,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[361,3],"tags":[],"class_list":["post-21782","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ia","category-tech"],"yoast_head":"\nEste nuevo algoritmo detecta deepfakes el 94 % de las veces fij\u00e1ndose en c\u00f3mo la luz se refleja en los ojos - Observatorio Tecnol\u00f3gico de Hidalgo<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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