{"id":9116,"date":"2024-01-11T18:43:03","date_gmt":"2024-01-11T18:43:03","guid":{"rendered":"https:\/\/dailyai.com\/?p=9116"},"modified":"2024-01-11T22:07:13","modified_gmt":"2024-01-11T22:07:13","slug":"researchers-from-columbia-university-challenge-fingerprint-assumptions","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2024\/01\/researchers-from-columbia-university-challenge-fingerprint-assumptions\/","title":{"rendered":"Investigadores da Universidade de Columbia desafiam os pressupostos das impress\u00f5es digitais"},"content":{"rendered":"<p><b>Os investigadores da Universidade de Columbia utilizaram uma ferramenta de IA para desafiar a cren\u00e7a de longa data de que cada impress\u00e3o digital \u00e9 \u00fanica para a m\u00e3o de um indiv\u00edduo.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Este <\/span><a href=\"https:\/\/www.engineering.columbia.edu\/news\/ai-discovers-not-every-fingerprint-unique\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">estudo<\/span><\/a><span style=\"font-weight: 400;\">O estudo da Comiss\u00e3o Europeia, que envolveu a an\u00e1lise de 60.000 impress\u00f5es digitais, sugere que as impress\u00f5es de diferentes dedos da mesma pessoa podem n\u00e3o ser t\u00e3o distintas como se pensava anteriormente.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As impress\u00f5es digitais s\u00e3o um componente bastante elusivo do corpo humano e, embora tenhamos suposi\u00e7\u00f5es de longa data sobre elas - como o facto de n\u00e3o haver duas pessoas com impress\u00f5es digitais iguais - elas n\u00e3o est\u00e3o, em grande parte, comprovadas.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Graham Williams, professor de ci\u00eancia forense na Universidade de Hull, observou que a singularidade das impress\u00f5es digitais nunca foi definitivamente provada. \"De facto, n\u00e3o sabemos se as impress\u00f5es digitais s\u00e3o \u00fanicas\", afirmou.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Tudo o que podemos dizer \u00e9 que, tanto quanto sabemos, ainda n\u00e3o h\u00e1 duas pessoas que demonstrem as mesmas impress\u00f5es digitais\". Mas h\u00e1 at\u00e9 quem refute isso, ou pelo menos admita a falta de provas em grande escala.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A ferramenta de IA, treinada pela equipa de engenharia da Columbia, conseguiu identificar com uma precis\u00e3o de 75 a 90% se as impress\u00f5es digitais de dedos diferentes pertenciam \u00e0 mesma pessoa.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Isto levanta possibilidades intrigantes tanto para a biometria como para a ci\u00eancia forense. Por exemplo, se forem encontradas impress\u00f5es digitais n\u00e3o identificadas de dedos diferentes em cenas de crime separadas, esta ferramenta de IA poderia potencialmente lig\u00e1-las ao mesmo indiv\u00edduo, uma capacidade que atualmente ultrapassa os m\u00e9todos forenses tradicionais.<\/span><\/p>\n<p><iframe loading=\"lazy\" title=\"A IA aprende a correlacionar as impress\u00f5es digitais \u00fanicas de uma pessoa\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/s5esfRbBc18?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"font-weight: 400;\">O Professor Hod Lipson, um roboticista da Universidade de Columbia que supervisionou o estudo, admitiu que a equipa ainda n\u00e3o compreendeu totalmente os m\u00e9todos da IA, afirmando: \"N\u00e3o sabemos ao certo como a IA o faz\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Embora possa parecer bizarro, este facto indica a sempre presente <a href=\"https:\/\/dailyai.com\/pt\/2024\/01\/researchers-aim-to-determine-how-black-box-drug-discovery-models-work\/\" target=\"_blank\" rel=\"noopener\">Problema da \"caixa negra\" na IA<\/a> - \u00e9 mais f\u00e1cil compreender as entradas e sa\u00eddas do que o que est\u00e1 a acontecer em redes neuronais dispersas.\u00a0<\/span><\/p>\n<h2>Mist\u00e9rios das impress\u00f5es digitais<\/h2>\n<p><span style=\"font-weight: 400;\">A IA parece analisar as impress\u00f5es digitais de forma diferente, concentrando-se na orienta\u00e7\u00e3o das cristas no centro de uma impress\u00e3o digital, em oposi\u00e7\u00e3o ao m\u00e9todo tradicional de examinar a forma como as cristas individuais terminam e se bifurcam - uma carater\u00edstica conhecida como min\u00facias.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"\u00c9 evidente que n\u00e3o est\u00e1 a usar os marcadores tradicionais que os forenses usam h\u00e1 d\u00e9cadas\", explica Lipson. \"Parece que est\u00e1 a usar algo como a curvatura e o \u00e2ngulo dos redemoinhos no centro.\"<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As implica\u00e7\u00f5es deste estudo s\u00e3o significativas para a ci\u00eancia forense e a seguran\u00e7a biom\u00e9trica. Por exemplo, numa investiga\u00e7\u00e3o criminal, se uma impress\u00e3o digital n\u00e3o identificada do polegar for descoberta numa cena de crime e uma impress\u00e3o digital do indicador n\u00e3o identificada noutra, esta ferramenta de IA pode potencialmente ligar estas impress\u00f5es \u00e0 mesma pessoa.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">No entanto, a equipa de Columbia, que n\u00e3o tem forma\u00e7\u00e3o forense, reconheceu a necessidade de mais investiga\u00e7\u00e3o.\u00a0<\/span><\/p>\n<p>Lipson falou da capacidade da IA para quebrar os silos tradicionais de compet\u00eancias acad\u00e9micas, explicando: \"Muitas pessoas pensam que a IA n\u00e3o pode realmente fazer novas descobertas - que se limita a regurgitar conhecimentos\".<\/p>\n<p>\"Mas esta investiga\u00e7\u00e3o \u00e9 um exemplo de como mesmo uma IA bastante simples, com um conjunto de dados bastante simples que a comunidade de investiga\u00e7\u00e3o tem h\u00e1 anos, pode fornecer informa\u00e7\u00f5es que iludiram os especialistas durante d\u00e9cadas\".<\/p>\n<p><span style=\"font-weight: 400;\">Para aperfei\u00e7oar a tecnologia, seriam necess\u00e1rias muitas mais impress\u00f5es digitais de um conjunto de dados mais diversificado. A equipa tamb\u00e9m observou que o seu modelo foi desenvolvido utilizando impress\u00f5es completas e de alta qualidade, enquanto os cen\u00e1rios do mundo real envolvem frequentemente impress\u00f5es parciais ou de baixa qualidade.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gabe Guo, finalista da licenciatura em Engenharia da Columbia, salientou as actuais limita\u00e7\u00f5es da sua ferramenta, explicando: \"A nossa ferramenta n\u00e3o \u00e9 suficientemente boa para decidir sobre provas em processos judiciais, mas \u00e9 boa para gerar pistas em investiga\u00e7\u00f5es forenses\".<\/span><\/p>\n<p>\u00c9 prov\u00e1vel que a equipa tamb\u00e9m tenha de provar como \u00e9 que a IA obt\u00e9m os seus resultados se quiser ter alguma utilidade no mundo real.<\/p>\n<p><span style=\"font-weight: 400;\">O estudo, revisto por pares e que dever\u00e1 ser publicado na revista Science Advances (ainda n\u00e3o publicado no momento em que este artigo foi escrito), representa um passo no sentido de desafiar os pressupostos de longa data na an\u00e1lise de impress\u00f5es digitais, mas tamb\u00e9m real\u00e7a as complexidades inerentes \u00e0 investiga\u00e7\u00e3o baseada em IA.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Investigadores da Universidade de Columbia utilizaram uma ferramenta de IA para desafiar a cren\u00e7a de longa data de que cada impress\u00e3o digital \u00e9 \u00fanica para a m\u00e3o de um indiv\u00edduo.  Este estudo, que envolveu a an\u00e1lise de 60.000 impress\u00f5es digitais, sugere que as impress\u00f5es de diferentes dedos da mesma pessoa podem n\u00e3o ser t\u00e3o distintas como se pensava anteriormente. As impress\u00f5es digitais s\u00e3o um componente bastante elusivo do corpo humano e, embora tenhamos suposi\u00e7\u00f5es de longa data sobre elas - como o facto de n\u00e3o existirem duas impress\u00f5es digitais iguais -, estas n\u00e3o est\u00e3o, em grande parte, comprovadas.  Graham Williams, professor de ci\u00eancia forense na Universidade de Hull, observou que a singularidade das impress\u00f5es digitais nunca foi definitivamente provada. \"N\u00f3s<\/p>","protected":false},"author":2,"featured_media":9117,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[519,105],"class_list":["post-9116","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethics","tag-forensics","tag-machine-learning"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Researchers from Columbia University challenge fingerprint assumptions | DailyAI<\/title>\n<meta name=\"description\" content=\"Researchers from Columbia University used an AI tool to challenge the long-standing belief that each fingerprint is unique to an individual&#039;s hand.\u00a0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dailyai.com\/pt\/2024\/01\/researchers-from-columbia-university-challenge-fingerprint-assumptions\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Researchers from Columbia University challenge fingerprint assumptions | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Researchers from Columbia University used an AI tool to challenge the long-standing belief that each fingerprint is unique to an individual&#039;s hand.\u00a0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dailyai.com\/pt\/2024\/01\/researchers-from-columbia-university-challenge-fingerprint-assumptions\/\" \/>\n<meta property=\"og:site_name\" content=\"DailyAI\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-11T18:43:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-11T22:07:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/shutterstock_2123875418.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"667\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Sam Jeans\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DailyAIOfficial\" \/>\n<meta name=\"twitter:site\" content=\"@DailyAIOfficial\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sam Jeans\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/dailyai.com\\\/2024\\\/01\\\/researchers-from-columbia-university-challenge-fingerprint-assumptions\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/dailyai.com\\\/2024\\\/01\\\/researchers-from-columbia-university-challenge-fingerprint-assumptions\\\/\"},\"author\":{\"name\":\"Sam Jeans\",\"@id\":\"https:\\\/\\\/dailyai.com\\\/#\\\/schema\\\/person\\\/711e81f945549438e8bbc579efdeb3c9\"},\"headline\":\"Researchers from Columbia University challenge fingerprint assumptions\",\"datePublished\":\"2024-01-11T18:43:03+00:00\",\"dateModified\":\"2024-01-11T22:07:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/dailyai.com\\\/2024\\\/01\\\/researchers-from-columbia-university-challenge-fingerprint-assumptions\\\/\"},\"wordCount\":640,\"publisher\":{\"@id\":\"https:\\\/\\\/dailyai.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/dailyai.com\\\/2024\\\/01\\\/researchers-from-columbia-university-challenge-fingerprint-assumptions\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/dailyai.com\\\/wp-content\\\/uploads\\\/2024\\\/01\\\/shutterstock_2123875418.jpg\",\"keywords\":[\"Forensics\",\"machine learning\"],\"articleSection\":[\"Ethics &amp; 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