{"id":9446,"date":"2024-01-24T09:26:57","date_gmt":"2024-01-24T09:26:57","guid":{"rendered":"https:\/\/dailyai.com\/?p=9446"},"modified":"2024-01-24T12:56:28","modified_gmt":"2024-01-24T12:56:28","slug":"google-unveils-lumiere-a-text-to-video-diffusion-model","status":"publish","type":"post","link":"https:\/\/dailyai.com\/fr\/2024\/01\/google-unveils-lumiere-a-text-to-video-diffusion-model\/","title":{"rendered":"Google d\u00e9voile Lumiere, un mod\u00e8le de diffusion de texte en vid\u00e9o"},"content":{"rendered":"<p><strong>Google Research a d\u00e9voil\u00e9 Lumiere, un mod\u00e8le de diffusion texte-vid\u00e9o qui cr\u00e9e des vid\u00e9os remarquablement r\u00e9alistes \u00e0 partir de textes ou d'images.<\/strong><\/p>\n<p>Les images fixes g\u00e9n\u00e9r\u00e9es par des outils tels que <a href=\"https:\/\/dailyai.com\/fr\/2023\/12\/midjourney-v6-released-with-big-improvements-and-image-text\/\">Voyage \u00e0 mi-parcours<\/a> ou DALL-E sont incroyables, mais la conversion de texte en vid\u00e9o (TTV) est logiquement \u00e0 la tra\u00eene et a \u00e9t\u00e9 beaucoup moins impressionnante jusqu'\u00e0 pr\u00e9sent.<\/p>\n<p>Les mod\u00e8les TTV tels que ceux de Pika Labs ou de Stable Video Diffusion ont beaucoup \u00e9volu\u00e9 au cours des 12 derniers mois, mais le r\u00e9alisme et la continuit\u00e9 du mouvement sont encore un peu maladroits.<\/p>\n<p>Lumiere repr\u00e9sente un grand pas en avant dans le domaine de la TTV gr\u00e2ce \u00e0 une nouvelle approche de la g\u00e9n\u00e9ration de vid\u00e9os coh\u00e9rentes dans l'espace et dans le temps. En d'autres termes, l'objectif est que les sc\u00e8nes de chaque image restent visuellement coh\u00e9rentes et que les mouvements soient fluides.<\/p>\n<h2>Que peut faire Lumiere ?<\/h2>\n<p>Lumiere dispose d'une gamme de fonctionnalit\u00e9s de g\u00e9n\u00e9ration de vid\u00e9o, dont les suivantes :<\/p>\n<ul>\n<li><strong>Du texte \u00e0 la vid\u00e9o<\/strong> - Saisissez un texte et Lumiere g\u00e9n\u00e8re un clip vid\u00e9o de 5 secondes compos\u00e9 de 80 images \u00e0 16 images par seconde.<\/li>\n<li><strong>De l'image \u00e0 la vid\u00e9o<\/strong> - Lumiere prend une image comme point de d\u00e9part et la transforme en vid\u00e9o.<\/li>\n<li><strong>G\u00e9n\u00e9ration stylis\u00e9e<\/strong> - Une image peut \u00eatre utilis\u00e9e comme r\u00e9f\u00e9rence de style. Lumiere utilise une invite de texte pour g\u00e9n\u00e9rer une vid\u00e9o dans le style de l'image de r\u00e9f\u00e9rence.<\/li>\n<li><strong>Stylisation vid\u00e9o<\/strong> - Lumiere peut \u00e9diter une vid\u00e9o source pour qu'elle corresponde \u00e0 un texte stylistique.<\/li>\n<li><strong>Cin\u00e9magraphes<\/strong> - S\u00e9lectionnez une zone dans une image fixe et Lumiere animera cette partie de l'image.<\/li>\n<li><strong>Inpeinture vid\u00e9o<\/strong> - Lumiere peut prendre une sc\u00e8ne vid\u00e9o masqu\u00e9e et la peindre pour compl\u00e9ter la vid\u00e9o. Il peut \u00e9galement \u00e9diter une vid\u00e9o source en supprimant ou en rempla\u00e7ant des \u00e9l\u00e9ments de la sc\u00e8ne.<\/li>\n<\/ul>\n<p>La vid\u00e9o ci-dessous montre quelques-unes des vid\u00e9os impressionnantes que Lumiere peut g\u00e9n\u00e9rer.<\/p>\n<p><iframe loading=\"lazy\" title=\"Lumi\u00e8re\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/wxLr02Dz2Sc?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<h2>Comment fait Lumiere ?<\/h2>\n<p>Les mod\u00e8les TTV existants adoptent une conception en cascade dans laquelle un mod\u00e8le de base g\u00e9n\u00e8re un sous-ensemble d'images cl\u00e9s et utilise ensuite un mod\u00e8le de super-r\u00e9solution temporelle (TSR) pour g\u00e9n\u00e9rer des donn\u00e9es afin de combler les lacunes entre les images.<\/p>\n<p>Cette approche est efficace en termes de m\u00e9moire, mais la tentative de combler les lacunes entre un ensemble sous-\u00e9chantillonn\u00e9 d'images cl\u00e9s aboutit \u00e0 une vid\u00e9o pr\u00e9sentant des incoh\u00e9rences temporelles ou des mouvements parasites. Les images \u00e0 faible r\u00e9solution sont ensuite mises \u00e0 l'\u00e9chelle \u00e0 l'aide d'un mod\u00e8le de super-r\u00e9solution spatiale (SSR) sur des fen\u00eatres qui ne se chevauchent pas.<\/p>\n<p>Lumiere adopte une approche diff\u00e9rente. Il utilise une architecture Space-Time U-Net (STUNet) qui apprend \u00e0 sous-\u00e9chantillonner le signal \u00e0 la fois dans l'espace et dans le temps et traite toutes les images en m\u00eame temps.<\/p>\n<p>Parce qu'il ne se contente pas de transmettre un sous-ensemble d'images cl\u00e9s \u00e0 un TSR, Lumiere permet d'obtenir un mouvement globalement coh\u00e9rent. Pour obtenir la vid\u00e9o haute r\u00e9solution, Lumiere applique un mod\u00e8le SSR sur des fen\u00eatres qui se chevauchent et utilise la MultiDiffusion pour combiner les pr\u00e9dictions en un r\u00e9sultat coh\u00e9rent.<\/p>\n<p>Google Research a r\u00e9alis\u00e9 une \u00e9tude aupr\u00e8s des utilisateurs qui a montr\u00e9 qu'ils pr\u00e9f\u00e9raient largement les vid\u00e9os Lumiere aux autres mod\u00e8les de TTV.<\/p>\n<figure id=\"attachment_9448\" aria-describedby=\"caption-attachment-9448\" style=\"width: 986px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9448 size-full\" src=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models.png\" alt=\"\" width=\"986\" height=\"1080\" srcset=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models.png 986w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-274x300.png 274w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-935x1024.png 935w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-768x841.png 768w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-370x405.png 370w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-800x876.png 800w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-740x811.png 740w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-20x22.png 20w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/01\/Lumiere-compared-to-other-TTV-models-44x48.png 44w\" sizes=\"auto, (max-width: 986px) 100vw, 986px\" \/><figcaption id=\"caption-attachment-9448\" class=\"wp-caption-text\">Pr\u00e9f\u00e9rences des utilisateurs concernant la qualit\u00e9 du texte par rapport \u00e0 la vid\u00e9o, l'alignement de la vid\u00e9o sur le texte et la qualit\u00e9 de l'image par rapport \u00e0 la vid\u00e9o. Source : Google Research<\/figcaption><\/figure>\n<p>Le r\u00e9sultat final n'est peut-\u00eatre qu'un clip de 5 secondes, mais le r\u00e9alisme et la coh\u00e9rence des images et des mouvements sont sup\u00e9rieurs \u00e0 tout ce qui est actuellement disponible. La plupart des autres solutions TTV ne g\u00e9n\u00e8rent pour l'instant que des clips de 3 secondes.<\/p>\n<p>Lumiere ne g\u00e8re pas les transitions de sc\u00e8nes ou les sc\u00e8nes vid\u00e9o \u00e0 prises de vue multiples, mais une fonctionnalit\u00e9 multi-sc\u00e8ne plus longue est certainement en cours de d\u00e9veloppement.<\/p>\n<p>Dans le cadre de la <a href=\"https:\/\/arxiv.org\/pdf\/2401.12945.pdf\">Document de recherche sur la lumi\u00e8re<\/a>Google a indiqu\u00e9 qu'\"il existe un risque d'utilisation abusive de notre technologie pour la cr\u00e9ation de contenus falsifi\u00e9s ou nuisibles\".<\/p>\n<p>J'esp\u00e8re qu'ils trouveront un moyen de filigraner efficacement leurs vid\u00e9os et d'\u00e9viter les probl\u00e8mes de droits d'auteur, afin qu'ils puissent publier Lumiere pour que nous puissions le mettre \u00e0 l'\u00e9preuve.<\/p>","protected":false},"excerpt":{"rendered":"<p>Google Research a d\u00e9voil\u00e9 Lumiere, un mod\u00e8le de diffusion texte-vid\u00e9o qui cr\u00e9e des vid\u00e9os remarquablement r\u00e9alistes \u00e0 partir de textes ou d'images. Les images fixes g\u00e9n\u00e9r\u00e9es par des outils tels que Midjourney ou DALL-E sont incroyables, mais la conversion de texte en vid\u00e9o (TTV) a logiquement pris du retard et s'est av\u00e9r\u00e9e beaucoup moins impressionnante jusqu'\u00e0 pr\u00e9sent. Les mod\u00e8les de TTV tels que ceux de Pika Labs ou de Stable Video Diffusion ont beaucoup progress\u00e9 au cours des 12 derniers mois, mais le r\u00e9alisme et la continuit\u00e9 du mouvement sont encore un peu maladroits. Lumiere repr\u00e9sente un grand pas en avant en mati\u00e8re de TTV gr\u00e2ce \u00e0 une nouvelle approche de la g\u00e9n\u00e9ration de vid\u00e9os coh\u00e9rentes dans l'espace et dans le temps.<\/p>","protected":false},"author":6,"featured_media":9451,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[107,102],"class_list":["post-9446","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product","tag-generative-ai","tag-google"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Google unveils Lumiere, a text-to-video diffusion model | 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\/fr\/2024\/01\/google-unveils-lumiere-a-text-to-video-diffusion-model\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Google unveils Lumiere, a text-to-video diffusion model | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Google Research unveiled Lumiere, a text-to-video diffusion model that creates remarkably realistic videos from text or image prompts. The still images generated by tools like Midjourney or DALL-E are incredible, but text-to-video (TTV) has understandably lagged behind and has been a lot less impressive so far. TTV models like those from Pika Labs or Stable Video Diffusion have come a long way in the last 12 months but the realism and continuity of motion are still a little clunky. 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