{"id":20945,"date":"2022-11-12T09:03:34","date_gmt":"2022-11-12T09:03:34","guid":{"rendered":"https:\/\/vr-room.ch\/?p=20945"},"modified":"2022-11-07T09:14:29","modified_gmt":"2022-11-07T09:14:29","slug":"nerf-player-streamt-dynamische-volumetrische-szenen-auch-fuer-vr","status":"publish","type":"post","link":"https:\/\/vr-room.ch\/it\/2022\/11\/12\/nerf-player-streamt-dynamische-volumetrische-szenen-auch-fuer-vr\/","title":{"rendered":"Il lettore NeRF trasmette scene volumetriche dinamiche, anche per la VR"},"content":{"rendered":"<h3 id=\"nerfs-repraesentieren-3d-szenen-in-einem-neuronalen-netz-eine-neue-arbeit-eines-internationalen-teams-zu-dem-auch-die-eth-zuerich-gehoert-oeffnet-die-ki-technologie-fuer-dynamische-szenen\">Le NeRF rappresentano scene 3D in una rete neurale. Un nuovo lavoro di un team internazionale che include il Politecnico di Zurigo apre la tecnologia AI alle scene dinamiche.<\/h3>\n<p>Nell'estate 2020, i ricercatori di Google hanno presentato <a href=\"https:\/\/the-decoder.de\/die-welt-digital-in-3d-googles-neue-ki-versteht-das-licht\">Campi di irradiazione neurale <\/a>(NERF) ha in programma il lancio di un <a href=\"https:\/\/the-decoder.de\/kuenstliche-intelligenz-begriffe-erklaerung\">AI<\/a>-processo in grado di estrarre dati di profondit\u00e0 3D da immagini 2D come le foto. Il NERF pu\u00f2 quindi creare un modello 3D strutturato da pi\u00f9 foto scattate da angolazioni diverse. I Neural Radiance Fields (NeRF) possono cos\u00ec renderizzare scene 3D da angolazioni inedite. Questo permette, ad esempio, di fare un giro a 360 gradi con la telecamera intorno a un oggetto, un giro con un drone o un volo all'interno di un ristorante. La tecnologia pu\u00f2 quindi essere utilizzata per generare oggetti 3D foto-realistici.<\/p>\n<p>Nella quasi totalit\u00e0 dei casi, tuttavia, si tratta di scene o oggetti statici, poich\u00e9 i movimenti introducono una dimensione temporale nel processo di addestramento che finora \u00e8 stato difficile risolvere.<\/p>\n<h3 id=\"nerfs-fuer-dynamische-szenen\">NeRF per scene dinamiche<\/h3>\n<p>In un nuovo documento di ricerca, un team dell'Universit\u00e0 di Buffalo, del Politecnico di Zurigo, di InnoPeak Technology e dell'Universit\u00e0 di Tubinga mostra ora come i NeRF possano rappresentare scene dinamiche e quindi apprendere una rappresentazione 4D.<\/p>\n<p>Come input vengono utilizzate immagini RGB provenienti da diverse telecamere o da una singola telecamera in movimento. Le immagini mostrano persone in movimento o qualcuno che versa del caff\u00e8 in un bicchiere.<\/p>\n<div id=\"attachment_9655\" class=\"wp-caption alignnone\"><a href=\"https:\/\/the-decoder.de\/wp-content\/uploads\/2022\/11\/NeRFPlayer-decomposition.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9655 size-medium entered litespeed-loaded\" src=\"https:\/\/the-decoder.de\/wp-content\/uploads\/2022\/11\/NeRFPlayer-decomposition-770x582.jpg\" alt=\"\" width=\"770\" height=\"582\" data-lazyloaded=\"1\" aria-describedby=\"caption-attachment-9655\" data-src=\"https:\/\/the-decoder.de\/wp-content\/uploads\/2022\/11\/NeRFPlayer-decomposition-770x582.jpg\" data-ll-status=\"loaded\" \/><\/a>Affinch\u00e9 i NeRF imparino le scene dinamiche, un cosiddetto campo di decomposizione divide la scena in diverse aree e poi il team divide le scene dinamiche in tre modelli temporali: aree statiche, deformanti e nuove.<\/p>\n<\/div>\n<p>Nel caso del caff\u00e8, ad esempio, la tavola di legno su cui poggia il bicchiere rimane statica. Il contenuto del bicchiere appare di nuovo e la mano visibile si deforma. Un campo di decomposizione si occupa della divisione della scena nelle tre categorie. Ogni area \u00e8 rappresentata da un proprio campo neurale. Nel loro approccio, i ricercatori disaccoppiano anche le dimensioni temporali e spaziali per migliorare la rappresentazione.<\/p>\n<h3 id=\"virtual-reality-als-vision\">\u00a0La realt\u00e0 virtuale come visione<\/h3>\n<p>La rappresentazione scomposta della scena dinamica riduce significativamente gli artefatti visivi rispetto ad altri approcci. Il team ha anche dimostrato con NeRFPlayer un modo per trasmettere in streaming le rappresentazioni apprese in tempo reale con velocit\u00e0 di trasmissione limitate.<\/p>\n<p>Attraverso il framework di Nvidia <a href=\"https:\/\/the-decoder.de\/nvidia-instant-ngp-ki-grafik-ist-weiter-auf-dem-vormarsch\/\" target=\"_blank\" rel=\"noopener\">InstantNGP<\/a>Il metodo presentato \u00e8 altrettanto veloce, in quanto consente a una rete neurale di apprendere in pochi secondi rappresentazioni di immagini gigapixel, oggetti 3D e NeRF.<\/p>\n<p>Nel lavoro, il team descrive l'esplorazione visiva di un vero ambiente spazio-temporale 4D per la realt\u00e0 virtuale come una visione e vede il proprio lavoro come un contributo a questo obiettivo.<\/p>\n<p>\"L'esplorazione visiva di uno spazio reale 4D liberamente in VR \u00e8 un compito di lunga data. Questo compito \u00e8 particolarmente interessante quando per catturare la scena dinamica si utilizzano poche o addirittura una sola telecamera RGB\", si legge nel documento.<\/p>\n<div class=\"video-block responsive-container\"><\/div>\n<p>Le dimostrazioni NeRF hanno origine da un documento di ricerca di Google del 2020 sui video di campi luminosi ripresi spazialmente.<\/p>\n<div id=\"content-end\"><\/div>\n<div class=\"article-source\">Fonte: Misto \/ il decoder<\/div>","protected":false},"excerpt":{"rendered":"Le NeRF rappresentano scene 3D in una rete neurale. Un nuovo lavoro di un team internazionale, tra cui l'ETH...","protected":false},"author":12,"featured_media":20946,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NeRF-Player streamt dynamische volumetrische Szenen \u2013 auch f\u00fcr VR - Schweizer Virtual Reality News<\/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:\/\/vr-room.ch\/it\/2022\/11\/12\/nerf-player-streamt-dynamische-volumetrische-szenen-auch-fuer-vr\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NeRF-Player streamt dynamische volumetrische Szenen \u2013 auch f\u00fcr VR - Schweizer Virtual Reality News\" \/>\n<meta property=\"og:description\" content=\"NeRFs repr\u00e4sentieren 3D-Szenen in einem neuronalen Netz. 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