{"id":13642,"date":"2024-07-31T09:28:08","date_gmt":"2024-07-31T09:28:08","guid":{"rendered":"https:\/\/dailyai.com\/?p=13642"},"modified":"2024-07-31T17:50:03","modified_gmt":"2024-07-31T17:50:03","slug":"metas-sam-2-model-enables-accurate-video-segmentation-in-seconds","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2024\/07\/metas-sam-2-model-enables-accurate-video-segmentation-in-seconds\/","title":{"rendered":"O modelo SAM 2 da Meta permite uma segmenta\u00e7\u00e3o precisa do v\u00eddeo em segundos"},"content":{"rendered":"<p><b>A divis\u00e3o de investiga\u00e7\u00e3o da Meta apresentou o SAM 2 (Segment Anything Model 2), um sistema de IA que representa um enorme avan\u00e7o na an\u00e1lise de v\u00eddeo.<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Este novo modelo expande as capacidades de segmenta\u00e7\u00e3o de imagem do seu antecessor SAM, aventurando-se no dom\u00ednio mais complexo do v\u00eddeo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A segmenta\u00e7\u00e3o de v\u00eddeo - a capacidade de identificar e seguir objectos espec\u00edficos numa cena em movimento - \u00e9 h\u00e1 muito um desafio para a IA.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Enquanto os seres humanos conseguem seguir sem esfor\u00e7o um carro que se desloca no tr\u00e2nsito ou uma pessoa que caminha no meio de uma multid\u00e3o, os sistemas de IA tendem a ter dificuldades.\u00a0<\/span>Este \u00e9 um enorme problema para <a href=\"https:\/\/dailyai.com\/pt\/2024\/07\/is-fear-the-key-the-building-more-adaptable-resilient-and-natural-ai-systems\/\">autom\u00f3veis sem condutor<\/a> e outros ve\u00edculos aut\u00f3nomos (AVs), que necessitam de seguir objectos 3D em movimento nos seus ambientes.<\/p>\n<p><a href=\"https:\/\/ai.meta.com\/research\/publications\/sam-2-segment-anything-in-images-and-videos\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">SAM 2<\/span><\/a><span style=\"font-weight: 400;\"> tem como objetivo colmatar esta lacuna, aproximando a compreens\u00e3o que a IA tem do v\u00eddeo da perce\u00e7\u00e3o ao n\u00edvel humano.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O sistema pode identificar e seguir praticamente qualquer objeto ao longo de um v\u00eddeo com o m\u00ednimo de interven\u00e7\u00e3o do utilizador - por vezes, apenas com um clique. <\/span><span style=\"font-weight: 400;\">Isto abre um mundo de possibilidades em dom\u00ednios que v\u00e3o desde a edi\u00e7\u00e3o de filmes \u00e0 investiga\u00e7\u00e3o cient\u00edfica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Eis como a Meta criou e testou o SAM 2:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A equipa criou uma t\u00e9cnica designada por Segmenta\u00e7\u00e3o Visual Promptable (PVS), que permite aos utilizadores guiar a IA com pistas simples em qualquer fotograma de v\u00eddeo. Isto significa que o sistema pode adaptar-se a uma vasta gama de cen\u00e1rios, desde localizar uma pessoa espec\u00edfica numa multid\u00e3o at\u00e9 seguir o movimento da asa de um p\u00e1ssaro em voo.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Constru\u00edram uma arquitetura de modelo que inclu\u00eda componentes para processar fotogramas individuais, armazenar informa\u00e7\u00f5es sobre objectos ao longo do tempo e gerar segmenta\u00e7\u00f5es precisas. <\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Um elemento chave \u00e9 o m\u00f3dulo de mem\u00f3ria, que permite ao SAM 2 manter um seguimento consistente mesmo quando os objectos desaparecem temporariamente da vista.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Foi criado um novo conjunto de dados maci\u00e7o, contendo mais de 50 000 v\u00eddeos e 35 milh\u00f5es de fotogramas marcados, superando os conjuntos de dados de segmenta\u00e7\u00e3o de v\u00eddeo anteriores. T<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Este conjunto de dados, denominado SA-V, abrange um vasto espetro de tipos de objectos, tamanhos e cen\u00e1rios, aumentando a capacidade do modelo para se generalizar a novas situa\u00e7\u00f5es.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">O modelo foi submetido a treinos e testes exaustivos em 17 conjuntos de dados de v\u00eddeo diferentes, desde imagens de c\u00e2maras de autom\u00f3veis a imagens m\u00e9dicas. <\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">O SAM 2 superou os m\u00e9todos existentes do estado da arte em tarefas de segmenta\u00e7\u00e3o semi-supervisionada de objectos de v\u00eddeo, alcan\u00e7ando uma melhoria m\u00e9dia de 7,5% nas pontua\u00e7\u00f5es J&amp;F (uma m\u00e9trica padr\u00e3o para a qualidade da segmenta\u00e7\u00e3o).<\/span><\/li>\n<\/ol>\n<div style=\"width: 1024px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-13642-1\" width=\"1024\" height=\"1024\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/07\/An9rqhh8jLAD81wdPLApEcu-1Z2NzXx4_528PrvelbMmWVgTvtk8DgdwDHRYohgxxotkX_WENwyB-eegqi3EQXlQ.mp4?_=1\" \/><a href=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/07\/An9rqhh8jLAD81wdPLApEcu-1Z2NzXx4_528PrvelbMmWVgTvtk8DgdwDHRYohgxxotkX_WENwyB-eegqi3EQXlQ.mp4\">https:\/\/dailyai.com\/wp-content\/uploads\/2024\/07\/An9rqhh8jLAD81wdPLApEcu-1Z2NzXx4_528PrvelbMmWVgTvtk8DgdwDHRYohgxxotkX_WENwyB-eegqi3EQXlQ.mp4<\/a><\/video><\/div>\n<p><strong>Acima<\/strong>: A segmenta\u00e7\u00e3o de imagens para clips de v\u00eddeo complexos separa diferentes formas em segundos.<\/p>\n<ul>\n<li class=\"whitespace-normal break-words\">Na produ\u00e7\u00e3o cinematogr\u00e1fica, o SAM 2 poder\u00e1 simplificar o trabalho de efeitos visuais, poupando tempo na p\u00f3s-produ\u00e7\u00e3o<\/li>\n<li class=\"whitespace-normal break-words\">Os cientistas podem seguir c\u00e9lulas em imagens de microscopia ou monitorizar altera\u00e7\u00f5es ambientais em imagens de sat\u00e9lite<\/li>\n<li class=\"whitespace-normal break-words\">Para os AV, incluindo os ve\u00edculos sem condutor, o SAM 2 poder\u00e1 melhorar a dete\u00e7\u00e3o de objectos em cen\u00e1rios de tr\u00e1fego complexos<\/li>\n<li class=\"whitespace-normal break-words\">Os conservacionistas da vida selvagem poderiam utilizar o SAM 2 para monitorizar as popula\u00e7\u00f5es animais em vastas \u00e1reas<\/li>\n<li class=\"whitespace-normal break-words\">Em AR\/VR, pode permitir interac\u00e7\u00f5es mais precisas com objectos virtuais em v\u00eddeo em direto<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Fiel ao compromisso da Meta com a investiga\u00e7\u00e3o aberta, o SAM 2 est\u00e1 a ser lan\u00e7ado como software de c\u00f3digo aberto.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Isto inclui n\u00e3o s\u00f3 o modelo, mas tamb\u00e9m o conjunto de dados utilizado para o treinar.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os investigadores j\u00e1 est\u00e3o a explorar formas de lidar com v\u00eddeos mais longos, melhorar o desempenho em detalhes finos e reduzir a pot\u00eancia computacional necess\u00e1ria para executar o modelo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00c0 medida que a tecnologia de segmenta\u00e7\u00e3o de imagens amadurece, ir\u00e1 certamente transformar a forma como interagimos e analisamos o conte\u00fado de v\u00eddeo. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Desde tornar mais acess\u00edveis tarefas de edi\u00e7\u00e3o complexas at\u00e9 permitir novas formas de an\u00e1lise visual, o SAM 2 ultrapassa os limites da manipula\u00e7\u00e3o visual.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>A divis\u00e3o de investiga\u00e7\u00e3o da Meta apresentou o SAM 2 (Segment Anything Model 2), um sistema de IA que marca um enorme avan\u00e7o na an\u00e1lise de v\u00eddeo. Este novo modelo expande as capacidades de segmenta\u00e7\u00e3o de imagem do seu antecessor SAM, aventurando-se no dom\u00ednio mais complexo do v\u00eddeo. A segmenta\u00e7\u00e3o de v\u00eddeo - a capacidade de identificar e seguir objectos espec\u00edficos numa cena em movimento - h\u00e1 muito que \u00e9 um desafio para a IA.  Enquanto os seres humanos conseguem seguir sem esfor\u00e7o um carro que se desloca no tr\u00e2nsito ou uma pessoa que caminha no meio de uma multid\u00e3o, os sistemas de IA tendem a ter dificuldades. Este \u00e9 um grande problema para os autom\u00f3veis sem condutor e outros ve\u00edculos aut\u00f3nomos (AV),<\/p>","protected":false},"author":2,"featured_media":13644,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[105,131],"class_list":["post-13642","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-machine-learning","tag-meta"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Meta&#039;s SAM 2 model enables accurate video segmentation in seconds | DailyAI<\/title>\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\/07\/metas-sam-2-model-enables-accurate-video-segmentation-in-seconds\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Meta&#039;s SAM 2 model enables accurate video segmentation in seconds | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Meta&#8217;s research division has introduced SAM 2 (Segment Anything Model 2), an AI system that marks a huge advancement in video analysis. This new model expands on its predecessor SAM\u2019s image segmentation skills, venturing into the more complex domain of video. Video segmentation &#8211; the ability to identify and track specific objects in a moving scene &#8211; has long been a challenge for AI.\u00a0 While humans can effortlessly follow a car as it moves through traffic or a person walking through a crowd, AI systems tend to struggle.\u00a0This is a massive problem for driverless cars and other autonomous vehicles (AVs),\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dailyai.com\/pt\/2024\/07\/metas-sam-2-model-enables-accurate-video-segmentation-in-seconds\/\" \/>\n<meta property=\"og:site_name\" content=\"DailyAI\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-31T09:28:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-31T17:50:03+00:00\" \/>\n<meta property=\"og:image\" 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