{"id":9706,"date":"2024-02-02T20:21:45","date_gmt":"2024-02-02T20:21:45","guid":{"rendered":"https:\/\/dailyai.com\/?p=9706"},"modified":"2024-02-07T14:54:58","modified_gmt":"2024-02-07T14:54:58","slug":"new-york-university-researchers-build-ai-that-sees-through-a-childs-eyes","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2024\/02\/new-york-university-researchers-build-ai-that-sees-through-a-childs-eyes\/","title":{"rendered":"Investigadores da Universidade de Nova Iorque criam uma IA que v\u00ea atrav\u00e9s dos olhos de uma crian\u00e7a"},"content":{"rendered":"<p><b>Os investigadores da Universidade de Nova Iorque inspiraram-se nos processos de aprendizagem das crian\u00e7as para treinar um sistema de IA.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">O m\u00e9todo, descrito em pormenor no <\/span><a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.adi1374\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">revista Science<\/span><\/a><span style=\"font-weight: 400;\">permite \u00e0 IA aprender com o seu ambiente sem depender fortemente de dados rotulados, o que \u00e9 fundamental para a conce\u00e7\u00e3o do estudo. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00c9 um reflexo da forma como as crian\u00e7as aprendem, absorvendo grandes quantidades de informa\u00e7\u00e3o do que as rodeia, dando gradualmente sentido ao mundo que as rodeia.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A equipa criou um conjunto de dados de 60 horas de grava\u00e7\u00f5es de v\u00eddeo na primeira pessoa a partir de uma c\u00e2mara montada na cabe\u00e7a usada por crian\u00e7as com idades compreendidas entre os seis meses e os dois anos para reproduzir a perspetiva de uma crian\u00e7a no seu modelo de IA.\u00a0<\/span><\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">1\/ Hoje na Science, treinamos uma rede neural de raiz atrav\u00e9s dos olhos e ouvidos de uma crian\u00e7a. O modelo aprende a mapear palavras para referentes visuais, mostrando como a aprendizagem de l\u00ednguas com base na perspetiva de apenas uma crian\u00e7a \u00e9 poss\u00edvel com as ferramentas de IA actuais. <a href=\"https:\/\/t.co\/hPZiiQt6Vv\">https:\/\/t.co\/hPZiiQt6Vv<\/a> <a href=\"https:\/\/t.co\/wa8jfn9b5Z\">pic.twitter.com\/wa8jfn9b5Z<\/a><\/p>\n<p>- Wai Keen Vong (@wkvong) <a href=\"https:\/\/twitter.com\/wkvong\/status\/1753132293491708027?ref_src=twsrc%5Etfw\">1 de fevereiro de 2024<\/a><\/p><\/blockquote>\n<p><script src=\"https:\/\/platform.twitter.com\/widgets.js\" async=\"\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">Em seguida, os investigadores treinaram um modelo de IA de aprendizagem auto-supervisionada (SSL) utilizando o conjunto de dados de v\u00eddeo para ver se a IA conseguia apreender o conceito de ac\u00e7\u00f5es e mudan\u00e7as atrav\u00e9s da an\u00e1lise de informa\u00e7\u00f5es temporais ou relacionadas com o tempo nos v\u00eddeos, tal como fazem as crian\u00e7as. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">As abordagens SSL permitem que os modelos de IA aprendam padr\u00f5es e estruturas nos dados sem r\u00f3tulos expl\u00edcitos.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O autor do estudo, Emri Orhan, <\/span><a href=\"https:\/\/sites.google.com\/view\/eminorhan\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">escrevendo no seu blogue de investiga\u00e7\u00e3o<\/span><\/a><span style=\"font-weight: 400;\">O Comiss\u00e1rio da UE para a Intelig\u00eancia Artificial, Dr. Giuseppe, j\u00e1 tinha defendido anteriormente uma maior aten\u00e7\u00e3o \u00e0 SSL na investiga\u00e7\u00e3o sobre IA, que considera fundamental para compreender processos de aprendizagem complexos.\u00a0<\/span><\/p>\n<p>Orhan escreveu: \"Diz-se frequentemente que as crian\u00e7as aprendem o significado das palavras de forma muito eficiente. Por exemplo, no segundo ano de vida, diz-se que as crian\u00e7as est\u00e3o a aprender, em m\u00e9dia, algumas palavras por dia. Isto sugere que s\u00e3o provavelmente capazes de aprender a maior parte das suas palavras a partir de apenas algumas exposi\u00e7\u00f5es (talvez muitas vezes a partir de uma \u00fanica exposi\u00e7\u00e3o), um fen\u00f3meno tamb\u00e9m conhecido como mapeamento r\u00e1pido\".<\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">4\/ Para testar isto, nada melhor do que treinar uma rede neuronal, n\u00e3o com enormes quantidades de dados da Web, mas apenas com o input que uma \u00fanica crian\u00e7a recebe? O que \u00e9 que ela aprenderia nessa altura, se \u00e9 que aprenderia alguma coisa? <a href=\"https:\/\/t.co\/bQ9aVbXUlB\">pic.twitter.com\/bQ9aVbXUlB<\/a><\/p>\n<p>- Wai Keen Vong (@wkvong) <a href=\"https:\/\/twitter.com\/wkvong\/status\/1753132300802445542?ref_src=twsrc%5Etfw\">1 de fevereiro de 2024<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">O estudo tamb\u00e9m teve como objetivo determinar se a IA precisa de preconceitos ou \"atalhos\" incorporados para aprender eficazmente ou se pode desenvolver uma compreens\u00e3o do mundo atrav\u00e9s de algoritmos de aprendizagem gerais, tal como acontece com uma crian\u00e7a.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os resultados foram intrigantes. Apesar de o v\u00eddeo cobrir apenas cerca de 1% das horas de vig\u00edlia da crian\u00e7a, o sistema de IA conseguiu aprender in\u00fameras palavras e conceitos, demonstrando a efici\u00eancia da aprendizagem a partir de dados limitados mas direccionados.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os resultados incluem:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Desempenho do reconhecimento de ac\u00e7\u00f5es<\/b><span style=\"font-weight: 400;\">: Os modelos de IA treinados no conjunto de dados SAYCam foram altamente eficazes no reconhecimento de ac\u00e7\u00f5es a partir de v\u00eddeos. Quando testados em tarefas de reconhecimento de ac\u00e7\u00f5es de precis\u00e3o, como o Kinetics-700 e o Something-Something-V2 (SSV2), os modelos revelaram um desempenho impressionante, mesmo com apenas um pequeno n\u00famero de exemplos rotulados para treino.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Compara\u00e7\u00e3o com o conjunto de dados Kinetics-700<\/b><span style=\"font-weight: 400;\">: Os modelos treinados pela SAYCam foram comparados com modelos treinados no Kinetics-700, um conjunto de dados diversificado de pequenos clips do YouTube. Notavelmente, os modelos SAYCam tiveram um desempenho competitivo, o que sugere que os dados de v\u00eddeo realistas em termos de desenvolvimento e centrados nas crian\u00e7as proporcionaram um ambiente de aprendizagem rico para a IA, semelhante ou mesmo melhor do que o conte\u00fado variado encontrado no YouTube.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Capacidade de interpola\u00e7\u00e3o de v\u00eddeo<\/b><span style=\"font-weight: 400;\">: Um resultado interessante foi a capacidade dos modelos para efetuar a interpola\u00e7\u00e3o de v\u00eddeo - prevendo segmentos em falta numa sequ\u00eancia de v\u00eddeo. Isto demonstrou uma compreens\u00e3o da din\u00e2mica temporal e da continuidade em cenas visuais, espelhando a forma como os humanos percepcionam e prev\u00eaem ac\u00e7\u00f5es.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Representa\u00e7\u00f5es robustas de objectos<\/b><span style=\"font-weight: 400;\">: O estudo tamb\u00e9m revelou que os modelos treinados em v\u00eddeo desenvolveram representa\u00e7\u00f5es de objectos mais robustas do que os modelos treinados em imagens est\u00e1ticas. Este facto foi evidente em tarefas que exigiam o reconhecimento de objectos em v\u00e1rias condi\u00e7\u00f5es, salientando o valor da informa\u00e7\u00e3o temporal na aprendizagem de modelos mais resistentes e vers\u00e1teis.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Escalonamento de dados e desempenho do modelo<\/b><span style=\"font-weight: 400;\">: A investiga\u00e7\u00e3o explorou a forma como o desempenho dos modelos melhorou com o aumento dos dados de v\u00eddeo do conjunto de dados SAYCam. Isto sugere que o acesso a dados mais extensos e realistas aumentar\u00e1 o desempenho dos modelos.<\/span><\/li>\n<\/ul>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">6\/ Resultados: Mesmo com dados limitados, descobrimos que o modelo pode adquirir mapeamentos palavra-refer\u00eancia a partir de meras dezenas a centenas de exemplos, generalizar a zero para novos conjuntos de dados visuais e conseguir um alinhamento multimodal. Mais uma vez, a aprendizagem genu\u00edna de l\u00ednguas \u00e9 poss\u00edvel a partir de... <a href=\"https:\/\/t.co\/FCHfZCqftr\">pic.twitter.com\/FCHfZCqftr<\/a><\/p>\n<p>- Wai Keen Vong (@wkvong) <a href=\"https:\/\/twitter.com\/wkvong\/status\/1753132306682753462?ref_src=twsrc%5Etfw\">1 de fevereiro de 2024<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">Wai Keen Vong, cientista investigador do Centro de Ci\u00eancia de Dados da NYU, <\/span><a href=\"https:\/\/www.nyu.edu\/about\/news-publications\/news\/2024\/february\/ai-learns-through-the-eyes-and-ears-of-a-child.html\"><span style=\"font-weight: 400;\">discutiu a novidade desta abordagem<\/span><\/a><span style=\"font-weight: 400;\">, afirmando: \"Mostramos, pela primeira vez, que uma rede neuronal treinada com base nesta informa\u00e7\u00e3o realista do ponto de vista do desenvolvimento de uma \u00fanica crian\u00e7a pode aprender a associar palavras \u00e0s suas contrapartes visuais\".\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ao abordar as quest\u00f5es com que se confrontam os modelos modernos de IA generativa, Vong afirmou: \"Os actuais sistemas de IA de \u00faltima gera\u00e7\u00e3o s\u00e3o treinados utilizando quantidades astron\u00f3micas de dados (frequentemente milhares de milh\u00f5es\/trili\u00f5es de palavras) e, no entanto, os seres humanos conseguem aprender e utilizar a linguagem com muito menos dados (centenas de milh\u00f5es de palavras), pelo que a liga\u00e7\u00e3o entre estes avan\u00e7os na aprendizagem autom\u00e1tica e a aquisi\u00e7\u00e3o da linguagem humana n\u00e3o \u00e9 clara\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O interesse por m\u00e9todos novos e \"leves\" de aprendizagem autom\u00e1tica est\u00e1 a aumentar. Por um lado, modelos monol\u00edticos colossais como o GPT-3 e o GPT-4 <\/span><a href=\"https:\/\/dailyai.com\/pt\/2024\/02\/data-center-energy-demands-soar-because-of-ai-how-do-we-sustain-it\/\"><span style=\"font-weight: 400;\">t\u00eam imensas exig\u00eancias de poder<\/span><\/a><span style=\"font-weight: 400;\"> que n\u00e3o s\u00e3o f\u00e1ceis de satisfazer.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Em segundo lugar, a cria\u00e7\u00e3o de <\/span><a href=\"https:\/\/dailyai.com\/pt\/2023\/08\/the-evolution-of-bio-inspired-ai-developments-and-future-direction\/\"><span style=\"font-weight: 400;\">sistemas de IA bio-inspirados<\/span><\/a><span style=\"font-weight: 400;\"> \u00e9 fundamental para conceber modelos ou rob\u00f4s que \"pensem\" e \"se comportem\" autenticamente como n\u00f3s.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Vong tamb\u00e9m reconheceu as limita\u00e7\u00f5es do estudo, observando: \"Uma ressalva \u00e9 que a entrada de linguagem para o modelo \u00e9 texto, n\u00e3o o sinal de fala subjacente que as crian\u00e7as recebem\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Este estudo desafiou os modelos tradicionais de forma\u00e7\u00e3o em IA e contribuiu para o debate em curso sobre as formas mais eficazes de imitar a aprendizagem biol\u00f3gica. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">O interesse por este tema vai aumentar \u00e0 medida que os modelos colossais de IA come\u00e7arem a mostrar limita\u00e7\u00f5es para o futuro.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Os investigadores da Universidade de Nova Iorque inspiraram-se nos processos de aprendizagem das crian\u00e7as para treinar um sistema de IA.  O m\u00e9todo, descrito em pormenor na revista Science, permite que a IA aprenda com o seu ambiente sem depender fortemente de dados rotulados, o que \u00e9 fundamental para a conce\u00e7\u00e3o do estudo. O m\u00e9todo reflecte a forma como as crian\u00e7as aprendem, absorvendo grandes quantidades de informa\u00e7\u00e3o do que as rodeia, dando gradualmente sentido ao mundo que as rodeia. A equipa criou um conjunto de dados de 60 horas de grava\u00e7\u00f5es de v\u00eddeo na primeira pessoa a partir de uma c\u00e2mara montada na cabe\u00e7a usada por crian\u00e7as com idades compreendidas entre os seis meses e os dois anos para reproduzir a perspetiva de uma crian\u00e7a no seu modelo de IA.  1\/<\/p>","protected":false},"author":2,"featured_media":9707,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[350,105,510,331],"class_list":["post-9706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-bio-inspired-ai","tag-machine-learning","tag-neuromorphic-computing","tag-neuroscience"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>New York University researchers build AI that sees through a child&#039;s eyes | 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