{"id":518,"date":"2022-12-01T09:00:00","date_gmt":"2022-12-01T09:00:00","guid":{"rendered":"https:\/\/makewise.pt\/pt\/?p=518"},"modified":"2024-02-28T09:00:32","modified_gmt":"2024-02-28T09:00:32","slug":"como-detectamos-objetos-em-videos-atraves-de-ai","status":"publish","type":"post","link":"https:\/\/makewise.pt\/pt\/como-detectamos-objetos-em-videos-atraves-de-ai\/","title":{"rendered":"Como detectamos objetos em v\u00eddeos (atrav\u00e9s de AI)?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Uma parte importante da utiliza\u00e7\u00e3o de sistemas de intelig\u00eancia artificial (IA), \u00e9 permitir que as empresas sejam mais eficientes enquanto os sistemas trabalham de forma independente. Uma das partes mais reconhecidas de tais sistemas \u00e9 o reconhecimento de imagem de IA. Isto permite que a m\u00e1quina localize, identifique e classifique objetos.<\/p>\n\n\n\n<!--more-->\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O que \u00e9 a dete\u00e7\u00e3o de objetos em v\u00eddeo?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A dete\u00e7\u00e3o de objetos \u00e9 tamb\u00e9m conhecida como dete\u00e7\u00e3o de imagem, reconhecimento de objetos ou identifica\u00e7\u00e3o de objetos. O seu objetivo \u00e9 responder \u00e0 pergunta &#8220;Que objetos est\u00e3o no v\u00eddeo, e onde est\u00e3o eles?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A dete\u00e7\u00e3o de objetos de v\u00eddeo imita a vis\u00e3o humana, permitindo \u00e0s m\u00e1quinas analisar cada fotograma de um v\u00eddeo e identificar os objetos presentes no seu interior. Este tipo de ferramenta visa localizar e identificar objetos vistos numa entrada de v\u00eddeo.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Como \u00e9 que a dete\u00e7\u00e3o de objetos em v\u00eddeo funciona?<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-6 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"520\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1-1024x1024.jpg\" alt=\"\" class=\"wp-image-520\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig1.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"521\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2-1024x1024.jpg\" alt=\"\" class=\"wp-image-521\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig2.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"522\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3-1024x1024.jpg\" alt=\"\" class=\"wp-image-522\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig3.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"523\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4-1024x1024.jpg\" alt=\"\" class=\"wp-image-523\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig4.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"524\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5-1024x1024.jpg\" alt=\"\" class=\"wp-image-524\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig5.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"525\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6-1024x1024.jpg\" alt=\"\" class=\"wp-image-525\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6-1024x1024.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6-300x300.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6-150x150.jpg 150w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6-768x768.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/12\/ig6.jpg 1080w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A dete\u00e7\u00e3o de objetos de v\u00eddeo classifica inst\u00e2ncias de objetos visuais, tais como humanos, ve\u00edculos, edif\u00edcios, animais, etc. Como em qualquer outra solu\u00e7\u00e3o de IA, o sistema precisa de ser &#8220;ensinado&#8221; ou &#8220;treinado&#8221; para detectar objetos num v\u00eddeo. Para isso, h\u00e1 alguns passos que precisam de ser seguidos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Recolha de dados &#8211; <\/strong>O primeiro passo \u00e9 a cria\u00e7\u00e3o de uma biblioteca de v\u00eddeo, de prefer\u00eancia que corresponda ao caso de utiliza\u00e7\u00e3o real. Quando todos os dados s\u00e3o recolhidos, s\u00e3o criadas diretrizes para a etiquetagem de objetos de interesse.<\/li>\n\n\n\n<li><strong>Etiquetagem de dados &#8211; <\/strong>Nesta fase, s\u00e3o desenhadas caixas de delimita\u00e7\u00e3o nas entidades que queremos que a IA identifique, com o objetivo de ensinar a m\u00e1quina a reconhecer esse tipo de objetos. Esta etapa e a anterior s\u00e3o extremamente importantes para opera\u00e7\u00f5es corretas.<\/li>\n\n\n\n<li><strong>Treino &#8211; <\/strong>O algoritmo \u00e9 depois treinado com esses dados, para garantir a sua precis\u00e3o. Ap\u00f3s o treino inicial, o desempenho \u00e9 avaliado em dados que n\u00e3o foram inclu\u00eddos no conjunto de dados inicial.<\/li>\n\n\n\n<li><strong>Testes &#8211;<\/strong> Na etapa final, a m\u00e1quina passa por testes reais, para determinar a exatid\u00e3o dos resultados e o acesso, caso seja necess\u00e1ria mais forma\u00e7\u00e3o. S\u00e3o realizadas m\u00faltiplas experi\u00eancias, e s\u00e3o feitas melhorias com base no feedback.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Casos de utiliza\u00e7\u00e3o para dete\u00e7\u00e3o de objetos em v\u00eddeo<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Existem numerosos casos de utiliza\u00e7\u00e3o para a dete\u00e7\u00e3o de objetos de v\u00eddeo, como por exemplo:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Video Vigil\u00e2ncia<\/strong> &#8211; A seguran\u00e7a pode ser melhorada utilizando a dete\u00e7\u00e3o de objetos de v\u00eddeo. Os retalhistas podem ter as suas lojas e armaz\u00e9ns equipados com o sistema para alertar a seguran\u00e7a em casos de roubo. Tamb\u00e9m pode ser utilizado para monitorizar a seguran\u00e7a e o desempenho dos funcion\u00e1rios.<\/li>\n\n\n\n<li><strong>An\u00e1lise de tr\u00e1fego<\/strong> &#8211; Ao contar os ve\u00edculos nas estradas e parques de estacionamento, \u00e9 poss\u00edvel evitar engarrafamentos, e as solu\u00e7\u00f5es de estacionamento podem ser otimizadas. Estes dados podem tamb\u00e9m ser utilizados para a constru\u00e7\u00e3o, manuten\u00e7\u00e3o e melhoramento de estradas.<\/li>\n\n\n\n<li><strong>Dete\u00e7\u00e3o de texto<\/strong> &#8211; O reconhecimento de matr\u00edculas pode ser utilizado para dar acesso a ve\u00edculos autorizados, localiza\u00e7\u00e3o de ve\u00edculos e rastreio.<\/li>\n\n\n\n<li><strong>Dete\u00e7\u00e3o facial<\/strong> &#8211; J\u00e1 existem v\u00e1rias utiliza\u00e7\u00f5es para este sistema, mesmo na vida quotidiana, com, por exemplo filtros de rede sociais que seguem rostos, e sistemas de seguran\u00e7a automatizados que bloqueiam ou desbloqueiam acessos usando o reconhecimento facial.<strong><\/strong><\/li>\n<\/ul>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>AID.VISION &#8211; Dete\u00e7\u00e3o autom\u00e1tica de incidentes em estradas<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/makewise.pt\/pt\/aid-vision-2\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-1024x576.jpg\" alt=\"AID.VISION - Sistema de dete\u00e7\u00e3o autom\u00e1tica de incidentes em estradas pela MakeWise\" class=\"wp-image-246\" srcset=\"https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-1024x576.jpg 1024w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-300x169.jpg 300w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-768x432.jpg 768w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-1536x864.jpg 1536w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3-1200x675.jpg 1200w, https:\/\/makewise.pt\/pt\/wp-content\/uploads\/sites\/2\/2022\/03\/detecao-automatica-de-incidentes-em-estradas-3.jpg 1920w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A AID.VISION \u00e9 uma solu\u00e7\u00e3o alimentada por sistemas de Intelig\u00eancia Artificial, que detecta automaticamente v\u00e1rios tipos de incidentes e desencadeia alertas em tempo real para um centro de opera\u00e7\u00f5es.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/makewise.pt\/pt\/aid-vision-2\/\">Marque aqui a sua demo.<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Confirme aqui todas as solu\u00e7\u00f5es da MakeWise, e inicie o processo de transforma\u00e7\u00e3o digital da sua empresa.<a href=\"https:\/\/makewise.pt\/contacts\/\"> Contacte-nos<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uma das partes mais reconhecidas de tais sistemas \u00e9 o reconhecimento de imagem de IA. Isto permite que a m\u00e1quina localize, identifique e classifique objetos.<\/p>\n","protected":false},"author":1,"featured_media":519,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[19,13,6,17],"class_list":["post-518","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-makewise","tag-avi-vision","tag-inteligencia-artificial","tag-makewise","tag-visao-por-computador"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Como detectamos objetos em v\u00eddeos (atrav\u00e9s de AI)? - MakeWise<\/title>\n<meta name=\"description\" content=\"Uma das partes mais reconhecidas de tais sistemas \u00e9 o reconhecimento de imagem de IA. 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