{"id":2317,"date":"2020-04-07T06:27:33","date_gmt":"2020-04-07T13:27:33","guid":{"rendered":"https:\/\/melindaozel.com\/?p=2317"},"modified":"2025-02-25T14:38:09","modified_gmt":"2025-02-25T19:38:09","slug":"bypassing-vr-headset-occlusion-in-face-tracking","status":"publish","type":"post","link":"https:\/\/melindaozel.com\/nl\/bypassing-vr-headset-occlusion-in-face-tracking\/","title":{"rendered":"Occlusie van VR-headset omzeilen bij gezichtstracering"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2317\" class=\"elementor elementor-2317\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6da80560 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6da80560\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2724d854\" data-id=\"2724d854\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7d11bd1c elementor-widget elementor-widget-text-editor\" data-id=\"7d11bd1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2><span style=\"font-weight: 500;\">Volgen wat je niet kunt zien<\/span><\/h2><p><div id='gallery-1' class='gallery galleryid-2317 gallery-columns-4 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/melindaozel.com\/nl\/bypassing-vr-headset-occlusion-in-face-tracking\/f3890bc6-9e9d-4b37-9b06-22ad9a97eaaf\/#main'><img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/F3890BC6-9E9D-4B37-9B06-22AD9A97EAAF.jpg?resize=150%2C150&amp;ssl=1\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/F3890BC6-9E9D-4B37-9B06-22AD9A97EAAF.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/F3890BC6-9E9D-4B37-9B06-22AD9A97EAAF.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/F3890BC6-9E9D-4B37-9B06-22AD9A97EAAF.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/melindaozel.com\/nl\/bypassing-vr-headset-occlusion-in-face-tracking\/da7a6e86-16c6-4b5e-b4ad-89b9ef84dd12\/#main'><img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/DA7A6E86-16C6-4B5E-B4AD-89B9EF84DD12.jpg?resize=150%2C150&amp;ssl=1\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/DA7A6E86-16C6-4B5E-B4AD-89B9EF84DD12.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/DA7A6E86-16C6-4B5E-B4AD-89B9EF84DD12.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/DA7A6E86-16C6-4B5E-B4AD-89B9EF84DD12.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/melindaozel.com\/nl\/bypassing-vr-headset-occlusion-in-face-tracking\/efd31615-cbfa-48e4-b548-439f0983198b\/#main'><img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/EFD31615-CBFA-48E4-B548-439F0983198B.jpg?resize=150%2C150&amp;ssl=1\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/EFD31615-CBFA-48E4-B548-439F0983198B.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/EFD31615-CBFA-48E4-B548-439F0983198B.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/EFD31615-CBFA-48E4-B548-439F0983198B.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/melindaozel.com\/nl\/bypassing-vr-headset-occlusion-in-face-tracking\/8a0ec850-7579-4cfb-a2a9-af86bb491395\/#main'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/8A0EC850-7579-4CFB-A2A9-AF86BB491395.jpg?resize=150%2C150&amp;ssl=1\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/8A0EC850-7579-4CFB-A2A9-AF86BB491395.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/8A0EC850-7579-4CFB-A2A9-AF86BB491395.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2020\/04\/8A0EC850-7579-4CFB-A2A9-AF86BB491395.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n<\/p><p><span style=\"font-weight: 300;\">Gedurende de jaren dat ik met gezichtsherkenning bezig ben geweest, heb ik onder ingenieurs en onderzoekers het bijgeloof opgemerkt dat je gezichtsherkenningspunten (zoals wenkbrauwen, ogen en mond) niet kunt volgen als ze buiten het camerabeeld vallen. Dit geloof is niet helemaal waar. Je hoeft een wenkbrauw niet te zien om te weten of hij omhoog of omhoog gaat, en je hoeft de neus niet te zien om te weten of hij rimpelt.<\/span><\/p><p><span style=\"font-weight: 300;\">Onze gezichten bollen op, rekken uit en rimpelen uniek bij elke gezichtsactie. Ik heb deze veranderingen gebruikt om labelaars te trainen om discrete uitdrukkingen te herkennen en nauwkeurig te classificeren op basis van alleen huidbewegingen. Met goed gerichte documentatie, een uitgebreide set voorbeelden en een hoogwaardige camera kun je grenzen aan informatie extrapoleren met een beperkte FOV.<\/span><\/p><p><span style=\"font-weight: 300;\">De minimale FOV die nodig is voor eye-tracking is vaak genoeg om een handvol acties te volgen. Beeld A (in de afbeelding hieronder) is het meest representatief voor hoe een blikgebaseerde tracker eruit kan zien. Hoewel het hoofddoel van eyetrackingcamera's is om net genoeg van het oog te bedekken om veranderingen in de blik te observeren, is het potentieel veel groter. Zelfs met deze geconcentreerde weergave kun je nog steeds het volgende detecteren <\/span><i><span style=\"font-weight: 300;\">bovenste dekselverhoger <\/span><\/i><span style=\"font-weight: 300;\">(AU5), <\/span><i><span style=\"font-weight: 300;\">wangverhoger <\/span><\/i><span style=\"font-weight: 300;\">(AU6) en <\/span><i><span style=\"font-weight: 300;\">dekselspanner<\/span><\/i><span style=\"font-weight: 300;\"> (AU7) met een relatief hoge mate van zekerheid. Deze acties zijn nuttig voor hun toepassingen in het meten van aandacht, reacties en betrokkenheid; het zijn ook cruciale signalen in communicatie.<\/span><\/p><p><span style=\"font-weight: 300;\">Veel mensen raken geblokkeerd door namen van actie-eenheden zoals <\/span><i><span style=\"font-weight: 300;\">wangverhoger <\/span><\/i><span style=\"font-weight: 300;\">en veronderstellen, \"We kunnen niet volgen <\/span><i><span style=\"font-weight: 300;\">wangverhoger <\/span><\/i><span style=\"font-weight: 300;\">omdat onze FOV het wanggebied niet dekt.\" Maar <\/span><i><span style=\"font-weight: 300;\">wangverhoger <\/span><\/i><span style=\"font-weight: 300;\">is meer dan de naam doet vermoeden; het is een actie die wordt veroorzaakt door het samentrekken van de orbicularis oculi, een spier die de oogcontour omgeeft. Hoewel bewegingen van de orbicularis oculi invloed hebben op de wangen, vinden veel veranderingen plaats in het gebied rond de oogkas. Zolang je een marginaal zicht hebt op de ooghoeken of een stukje huid onder het onderste ooglid, kun je bepalen of <\/span><i><span style=\"font-weight: 300;\">wangverhoger<\/span><\/i><span style=\"font-weight: 300;\"> plaatsvindt. Soortgelijke concepten zijn van toepassing op de andere acties die ik in de afbeeldingen hieronder heb opgesomd.\u00a0<\/span><\/p><h2><span style=\"font-weight: 500;\">Mogelijkheden met verschillende FOV's<\/span><\/h2><p><span style=\"font-weight: 400;\">Deze grafiek laat zien welke actie-eenheden (AU's) kunnen worden gedetecteerd met verschillende gezichtsvelden. <\/span><span style=\"font-weight: 300;\">Houd er rekening mee dat dit een beknopte uitsplitsing is van wat wel of niet mogelijk is met verschillende FOV's. (Als je meer wilt weten over voorspellingen voor lagere gezichts- en combinatievormen, <span style=\"color: #7b5182;\"><a style=\"color: #7b5182;\" href=\"https:\/\/melindaozel.com\/services\/\">Ik ben beschikbaar voor overleg<\/a>.<\/span>) De omstandigheden zullen veranderen op basis van extra factoren zoals de camerahoek en hoe de headset op het gezicht rust. (Is de headset zwaar? Welk effect hebben het gewicht en de druk op verschillende delen van het gezicht?)\u00a0<\/span><\/p><p><span style=\"font-weight: 300;\">Als je werkt aan in-headset face-tracking, laat je dan niet beperken door aannames. Het gezicht is ingewikkeld en zit vol aanwijzingen. Je hoeft alleen maar de juiste aanwijzingen te vinden en je kunt met weinig veel bereiken.\u00a0<\/span><b style=\"color: #000000; font-family: 'Helvetica Neue'; font-size: 20px; background-color: var(--base-3);\"><div class=\"mepr_error\"><p>De resterende inhoud is voor <a href=\"https:\/\/melindaozel.com\/subscription-options\/\" target=\"_blank\" rel=\"noopener\">Premium leden<\/a> alleen. Als je lid bent, <a href=\"https:\/\/melindaozel.com\/login\/\" target=\"_blank\" rel=\"noopener\">aanmelden<\/a> en ga terug naar deze pagina :)!<\/p>\n<\/div><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Het vermogen van VR om aanwezigheid op afstand te verbeteren is nu misschien wel belangrijker dan ooit, gezien de nieuwe sociale beperkingen als gevolg van onze huidige pandemie.<\/p>","protected":false},"author":60486633,"featured_media":2329,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[676756913,676756994,676757036,676757039,676757037,676756915,676757009,676756993],"tags":[],"class_list":["post-2317","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-action-units","category-ar-vr","category-au6","category-au7","category-cheek-raiser","category-facial-expressions","category-paid","category-tech","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Bypassing VR Headset Occlusion in Face Tracking - Face the FACS | Facial Expressions in Animation, AI, &amp; 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