{"id":2678,"date":"2020-06-01T23:36:32","date_gmt":"2020-06-02T03:36:32","guid":{"rendered":"https:\/\/melindaozel.com\/?p=2678"},"modified":"2025-03-18T12:03:56","modified_gmt":"2025-03-18T16:03:56","slug":"arkit-other-face-tracking-mistakes","status":"publish","type":"post","link":"https:\/\/melindaozel.com\/vi\/arkit-other-face-tracking-mistakes\/","title":{"rendered":"ARKit v\u00e0 c\u00e1c l\u1ed7i theo d\u00f5i khu\u00f4n m\u1eb7t kh\u00e1c"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2678\" class=\"elementor elementor-2678\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1eb70452 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1eb70452\" 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-42ddc1c4\" data-id=\"42ddc1c4\" 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-27f6f858 elementor-widget elementor-widget-text-editor\" data-id=\"27f6f858\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><em>T\u1ea1i sao nhi\u1ec1u c\u00f4ng c\u1ee5 theo d\u00f5i khu\u00f4n m\u1eb7t v\u00e0 avatar l\u1ea1i g\u1eb7p ph\u1ea3i v\u1ea5n \u0111\u1ec1 nh\u1ea7m l\u1eabn khi ph\u00e1t hi\u1ec7n n\u1ebfp nh\u0103n tr\u00ean tr\u00e1n? B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch tr\u01b0\u1eddng h\u1ee3p c\u1ee7a Apple's ARKit, b\u00e0i ph\u00e2n t\u00edch n\u00e0y \u0111i s\u00e2u v\u00e0o nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a v\u1ea5n \u0111\u1ec1 v\u00e0 ti\u1ebft l\u1ed9 m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn b\u1ea5t ng\u1edd \u1edf ph\u1ea7n k\u1ebft.\u00a0<\/em><\/p><h2>Avatar &amp; Bi\u1ec3u t\u01b0\u1ee3ng c\u1ea3m x\u00fac: Phi\u00ean b\u1ea3n Memoji<\/h2><p>Sai s\u00f3t \"gi\u1ea3m tr\u00e1n gi\u1ea3\" l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn trong c\u00f4ng ngh\u1ec7 theo d\u00f5i khu\u00f4n m\u1eb7t v\u00e0 ho\u1ea1t h\u00ecnh avatar. M\u1eb7c d\u00f9 kh\u00e1 tinh t\u1ebf, nh\u1eefng l\u1ed7i n\u00e0y c\u00f3 th\u1ec3 l\u00e0m bi\u1ebfn d\u1ea1ng bi\u1ec3u c\u1ea3m c\u1ee7a avatar, g\u00e2y ra c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng mong mu\u1ed1n nh\u01b0 bu\u1ed3n b\u00e3, gi\u1eadn d\u1eef ho\u1eb7c lo l\u1eafng. Trong video d\u01b0\u1edbi \u0111\u00e2y, t\u00f4i \u0111\u00e3 th\u1eed nghi\u1ec7m t\u00ednh n\u0103ng Memoji c\u1ee7a Apple \u0111\u1ec3 minh h\u1ecda v\u1ea5n \u0111\u1ec1 n\u00e0y trong th\u1ef1c t\u1ebf.<\/p><p>\u00a0<span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe class=\"youtube-player\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/3LjvYjHRADc?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=vi&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p><p>Trong \u0111o\u1ea1n video tr\u00ean, h\u00e3y quan s\u00e1t c\u00e1ch Memoji c\u1ee7a t\u00f4i \"ph\u1ea3n chi\u1ebfu\" n\u1ee5 c\u01b0\u1eddi c\u1ee7a t\u00f4i. B\u1ea1n c\u00f3 nh\u1eadn th\u1ea5y \u0111i\u1ec1u g\u00ec k\u1ef3 l\u1ea1 ho\u1eb7c kh\u00f4ng tho\u1ea3i m\u00e1i kh\u00f4ng? G\u00f3c trong c\u1ee7a l\u00f4ng m\u00e0y t\u00f4i b\u1ecb h\u1ea1 xu\u1ed1ng m\u1ed9t c\u00e1ch sai l\u1ec7ch. Vi\u1ec7c h\u1ea1 l\u00f4ng m\u00e0y m\u1ed9t c\u00e1ch sai l\u1ec7ch n\u00e0y v\u1eabn t\u1ed3n t\u1ea1i trong c\u00e1c lo\u1ea1i n\u1ee5 c\u01b0\u1eddi kh\u00e1c nhau. N\u00f3 c\u0169ng xu\u1ea5t hi\u1ec7n \u1edf ng\u01b0\u1eddi d\u00f9ng kh\u00e1c.<\/p><p>L\u00f4ng m\u00e0y trong h\u1ea1 th\u1ea5p k\u1ebft h\u1ee3p v\u1edbi m\u00f4i tr\u00ean nh\u00f4 l\u00ean (do) <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i <\/em>ho\u1eb7c <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em>) th\u01b0\u1eddng \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nh\u1eefng c\u1ea3m x\u00fac ti\u00eau c\u1ef1c. \u0110\u1ea7u l\u00f4ng m\u00e0y h\u1ea1 xu\u1ed1ng c\u0169ng c\u00f3 m\u1ed1i t\u01b0\u01a1ng quan ngh\u1ecbch v\u1edbi n\u1ee5 c\u01b0\u1eddi. Nh\u1eefng l\u1ed7i theo d\u00f5i c\u00f3 \u00fd ngh\u0129a ng\u1eef ngh\u0129a n\u00e0y c\u00f3 th\u1ec3 v\u00f4 t\u00ecnh g\u1ee3i \u00fd c\u1ea3m x\u00fac ti\u00eau c\u1ef1c.<\/p><h2>Nh\u1eefng sai l\u1ea7m n\u00e0y x\u1ea3y ra nh\u01b0 th\u1ebf n\u00e0o?<\/h2><p>K\u1ebft qu\u1ea3 d\u01b0\u01a1ng t\u00ednh gi\u1ea3 trong vi\u1ec7c h\u1ea1 l\u00f4ng m\u00e0y th\u01b0\u1eddng xu\u1ea5t ph\u00e1t t\u1eeb c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u, l\u1ed7i ghi nh\u00e3n v\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn ngh\u1ec7 thu\u1eadt. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y v\u1eabn t\u1ed3n t\u1ea1i:<\/p><ol><li>Kh\u00f4ng c\u00f3 \u0111\u1ee7 s\u1ef1 ch\u00fa tr\u1ecdng v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u.<\/li><li>Kh\u00f4ng c\u00f3 \u0111\u1ee7 s\u1ef1 ch\u00fa tr\u1ecdng v\u00e0o ngh\u1ec7 thu\u1eadt.<\/li><\/ol><p>\u1ede m\u1ecdi n\u01a1i t\u00f4i \u0111\u00e3 l\u00e0m vi\u1ec7c, lu\u00f4n c\u00f3 r\u1ea5t nhi\u1ec1u lo ng\u1ea1i v\u1ec1 vi\u1ec7c tuy\u1ec3n d\u1ee5ng k\u1ef9 s\u01b0 c\u00f3 n\u1ec1n t\u1ea3ng chuy\u00ean m\u00f4n c\u1ee5 th\u1ec3. <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/melindaozel.com\/big-techs-homogeneous-hiring-habits-are-harming-our-data\/\" target=\"_blank\" rel=\"noopener noreferrer\">S\u1ed1 l\u01b0\u1ee3ng nh\u00e2n vi\u00ean \u0111\u01b0\u1ee3c \u0111i\u1ec1u chuy\u1ec3n kh\u1ecfi c\u00e1c v\u1ecb tr\u00ed quan tr\u1ecdng kh\u00e1c.<\/a><\/span><\/p><p>Nhi\u1ec1u nh\u00e0 l\u00e3nh \u0111\u1ea1o k\u1ef9 thu\u1eadt cho r\u1eb1ng n\u1ebfu h\u1ecd thu th\u1eadp \u0111\u1ee7 d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u00e0o t\u1ea1o m\u00f4 h\u00ecnh, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft. Wow! Ph\u00e9p m\u00e0u. Gi\u1ea3 \u0111\u1ecbnh n\u00e0y th\u01b0\u1eddng d\u1ef1a tr\u00ean m\u1ed9t ni\u1ec1m tin sai l\u1ea7m kh\u00e1c r\u1eb1ng ch\u1ec9 c\u00f3 m\u1ed9t t\u1ef7 l\u1ec7 r\u1ea5t nh\u1ecf d\u1eef li\u1ec7u kh\u00f4ng s\u1ea1ch.<\/p><p>T\u00f4i \u0111\u00e3 d\u00e0nh nhi\u1ec1u th\u1eddi gian nghi\u00ean c\u1ee9u s\u00e2u v\u1ec1 d\u1eef li\u1ec7u v\u00e0 \u0111\u00e3 tr\u1ea3i qua h\u1ea7u h\u1ebft c\u00e1c v\u1ecb tr\u00ed kh\u00f4ng li\u00ean quan \u0111\u1ebfn k\u1ef9 thu\u1eadt trong l\u0129nh v\u1ef1c theo d\u00f5i khu\u00f4n m\u1eb7t:<\/p><ul><li><strong>L\u1eadp k\u1ebf ho\u1ea1ch d\u1eef li\u1ec7u<\/strong> \u2013 X\u00e1c \u0111\u1ecbnh lo\u1ea1i d\u1eef li\u1ec7u bi\u1ec3u hi\u1ec7n c\u1ea7n thu th\u1eadp v\u00e0 ph\u01b0\u01a1ng ph\u00e1p thu th\u1eadp.<\/li><li><strong>Thu th\u1eadp d\u1eef li\u1ec7u<\/strong> \u2013 Th\u1ef1c s\u1ef1 l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c tham gia vi\u00ean v\u00e0 \u0111\u00e0o t\u1ea1o h\u1ecd \u0111\u1ec3 t\u1ea1o ra c\u00e1c t\u01b0 th\u1ebf bi\u1ec3u c\u1ea3m ch\u00ednh x\u00e1c.<\/li><li><strong>Ghi ch\u00fa d\u1eef li\u1ec7u<\/strong> \u2013 X\u00e1c \u0111\u1ecbnh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u00e1nh d\u1ea5u c\u00e1c \u0111i\u1ec3m tham chi\u1ebfu.<\/li><li><strong>Ph\u00e2n lo\u1ea1i d\u1eef li\u1ec7u<\/strong> \u2013 T\u01b0 v\u1ea5n cho b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt v\u1ec1 c\u00e1c l\u1edbp (class) c\u1ea7n t\u1ed3n t\u1ea1i, c\u00e1c th\u00f4ng s\u1ed1 (parameter) c\u1ee7a ch\u00fang v\u00e0 c\u00e1ch x\u1eed l\u00fd c\u00e1c tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7 (edge cases) kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi.<\/li><li><strong>M\u1edf r\u1ed9ng quy m\u00f4<\/strong> \u2013 \u0110\u1ea3m b\u1ea3o c\u00e1c quy t\u1eafc v\u1ec1 ch\u00fa th\u00edch v\u00e0 ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a v\u00e0 d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ch\u00fa th\u00edch quy m\u00f4 l\u1edbn.<\/li><li><strong>theo d\u00f5i v\u00e0 gi\u00e1m s\u00e1t<\/strong> \u2013 So s\u00e1nh k\u1ebft qu\u1ea3 th\u1ef1c t\u1ebf v\u1edbi k\u1ebft qu\u1ea3 theo d\u00f5i<\/li><li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c l\u0129nh v\u1ef1c c\u1ea7n c\u1ea3i thi\u1ec7n<\/strong> \u2013 X\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 hi\u1ec7n c\u00f3 v\u00e0 c\u00e1ch c\u1ea3i thi\u1ec7n ch\u00fang th\u00f4ng qua l\u1eadp k\u1ebf ho\u1ea1ch, thu th\u1eadp, ch\u00fa th\u00edch v\u00e0\/ho\u1eb7c ph\u00e2n lo\u1ea1i.<\/li><li><strong>Ph\u00e1t tri\u1ec3n avatar<\/strong> \u2013 X\u00e1c \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c \u01b0u ti\u00ean c\u00e1c h\u00ecnh d\u1ea1ng d\u1ef1a tr\u00ean s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 \u2013<ul><li>N\u01a1i tr\u00ecnh theo d\u00f5i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/li><li>C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng cu\u1ed1i c\u00f9ng c\u1ee7a s\u1ea3n ph\u1ea9m l\u00e0 g\u00ec?<\/li><li>\u0110i\u1ec1u g\u00ec s\u1ebd mang l\u1ea1i v\u1ebb \u0111\u1eb9p th\u1ea9m m\u1ef9 nh\u1ea5t?<\/li><li>\u0110i\u1ec1u g\u00ec l\u00e0 quan tr\u1ecdng nh\u1ea5t v\u1ec1 m\u1eb7t ng\u1eef ngh\u0129a?<\/li><\/ul><\/li><\/ul><p>V\u1edbi n\u1ec1n t\u1ea3ng ki\u1ebfn th\u1ee9c v\u1ec1 khoa h\u1ecdc bi\u1ec3u c\u1ea3m, gi\u1ea3i ph\u1eabu khu\u00f4n m\u1eb7t v\u00e0 kinh nghi\u1ec7m l\u00e0m vi\u1ec7c s\u00e2u r\u1ed9ng v\u1edbi d\u1eef li\u1ec7u khu\u00f4n m\u1eb7t, t\u00f4i c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng d\u1eef li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng trong c\u00f4ng ngh\u1ec7 theo d\u00f5i khu\u00f4n m\u1eb7t, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 nh\u1ecf. N\u00f3i t\u00f3m l\u1ea1i, ngay c\u1ea3 khi thu\u1eadt to\u00e1n ho\u00e0n h\u1ea3o, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1eabn ph\u00e1t sinh t\u1eeb:<\/p><p><strong>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea1o ra kh\u00f4ng ch\u00ednh x\u00e1c<\/strong><\/p><ul><li>Khi thu th\u1eadp d\u1eef li\u1ec7u bi\u1ec3u c\u1ea3m \u0111\u01b0\u1ee3c t\u1ea1o d\u00e1ng t\u1eeb ng\u01b0\u1eddi tham gia, d\u1eef li\u1ec7u lu\u00f4n b\u1ecb nhi\u1ec5m. \u0110\u1ea3m b\u1ea3o.<\/li><li>H\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n ch\u00ednh x\u00e1c m\u1ecdi bi\u1ec3u c\u1ea3m m\u1ee5c ti\u00eau. R\u1ea5t hi\u1ebfm khi t\u00ecm th\u1ea5y d\u1eef li\u1ec7u bi\u1ec3u c\u1ea3m khu\u00f4n m\u1eb7t thu\u1ea7n t\u00fay. Khi ng\u01b0\u1eddi tham gia th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec3u c\u1ea3m kh\u00f4ng thu\u1ea7n t\u00fay, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 do h\u1ecd \u0111ang th\u1ec3 hi\u1ec7n sai bi\u1ec3u c\u1ea3m khu\u00f4n m\u1eb7t ho\u1eb7c do h\u1ecd kh\u00f4ng th\u1ec3 t\u00e1ch bi\u1ec7t bi\u1ec3u c\u1ea3m m\u1ee5c ti\u00eau m\u00e0 kh\u00f4ng s\u1eed d\u1ee5ng c\u00e1c c\u01a1 m\u1eb7t kh\u00f4ng li\u00ean quan \u0111\u1ebfn m\u1ee5c ti\u00eau.<\/li><li>\u0110\u1ec3 t\u00f3m l\u1ea1i, c\u00e1c chuy\u00ean vi\u00ean thu th\u1eadp d\u1eef li\u1ec7u th\u01b0\u1eddng kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh li\u1ec7u ng\u01b0\u1eddi tham gia c\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n m\u1ee5c ti\u00eau hay kh\u00f4ng. S\u1ef1 thi\u1ebfu h\u1ee5t ki\u1ebfn th\u1ee9c n\u00e0y kh\u00f4ng ph\u1ea3i l\u1ed7i c\u1ee7a c\u00e1c chuy\u00ean vi\u00ean thu th\u1eadp d\u1eef li\u1ec7u, m\u00e0 l\u00e0 do \u01b0u ti\u00ean sai l\u1ea7m v\u00e0 s\u1ef1 thi\u1ebfu quan t\u00e2m c\u1ee7a C\u00f4ng ty X trong vi\u1ec7c tuy\u1ec3n d\u1ee5ng ho\u1eb7c gi\u1eef ch\u00e2n nh\u00e2n t\u00e0i ph\u00f9 h\u1ee3p.<\/li><\/ul><p><strong>G\u00e1n nh\u00e3n d\u1eef li\u1ec7u sai<\/strong><\/p><ul><li>Do s\u1ef1 t\u1eadp trung qu\u00e1 m\u1ee9c v\u00e0o nh\u00e2n t\u00e0i k\u1ef9 thu\u1eadt, c\u00e1c c\u00f4ng ty th\u01b0\u1eddng b\u1ecf qua vi\u1ec7c \u01b0u ti\u00ean c\u00e1c v\u1ecb tr\u00ed li\u00ean quan \u0111\u1ebfn vi\u1ec7c g\u1eafn nh\u00e3n d\u1eef li\u1ec7u. Thay v\u00e0o \u0111\u00f3, c\u00f4ng vi\u1ec7c g\u1eafn nh\u00e3n d\u1eef li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c xem l\u00e0 c\u00e1c v\u1ecb tr\u00ed c\u1ea5p th\u1ea5p, d\u00e0nh cho c\u00e1c nh\u00e0 th\u1ea7u kh\u00f4ng c\u00f3 chuy\u00ean m\u00f4n \u0111\u1eb7c bi\u1ec7t.<\/li><li>Nh\u1eefng nh\u00e0 th\u1ea7u m\u1edbi v\u00e0o ngh\u1ec1 v\u1edbi \u00edt kinh nghi\u1ec7m c\u00f3 th\u1ec3 d\u1ea7n d\u1ea7n tr\u1edf n\u00ean th\u00e0nh th\u1ea1o v\u1edbi d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c chuy\u00ean m\u00f4n; tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y hi\u1ebfm khi x\u1ea3y ra, v\u00ec c\u00e1c v\u1ecb tr\u00ed d\u00e1n nh\u00e3n h\u1ee3p \u0111\u1ed3ng th\u01b0\u1eddng c\u00f3 t\u1ef7 l\u1ec7 lu\u00e2n chuy\u1ec3n nh\u00e2n s\u1ef1 cao.<\/li><\/ul><p><strong>L\u1ef1a ch\u1ecdn ngh\u1ec7 thu\u1eadt thi\u1ebfu th\u00f4ng tin<\/strong><\/p><ul><li>\u0110\u1ed1i v\u1edbi ngh\u1ec7 thu\u1eadt, vi\u1ec7c hi\u1ec3u c\u00f4ng ngh\u1ec7 l\u00e0 quan tr\u1ecdng, v\u00e0 \u0111\u1ed1i v\u1edbi c\u00f4ng ngh\u1ec7, vi\u1ec7c hi\u1ec3u ngh\u1ec7 thu\u1eadt c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m. Hi\u1ec7n nay, t\u1ed3n t\u1ea1i m\u1ed9t kho\u1ea3ng c\u00e1ch \u0111\u00e1ng kinh ng\u1ea1c gi\u1eefa ngh\u1ec7 thu\u1eadt v\u00e0 k\u1ef9 thu\u1eadt trong c\u00e1c c\u00f4ng ty c\u00f4ng ngh\u1ec7. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, c\u00e1c c\u00f4ng c\u1ee5 theo d\u00f5i (trackers) tr\u00f4ng \u0111\u1eb9p m\u1eaft kh\u00f4ng ph\u1ea3i do b\u1ea3n th\u00e2n ch\u00fang, m\u00e0 l\u00e0 nh\u1edd nh\u1eefng l\u1ef1a ch\u1ecdn ngh\u1ec7 thu\u1eadt \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 kh\u1eafc ph\u1ee5c nh\u1eefng h\u1ea1n ch\u1ebf k\u1ef9 thu\u1eadt ch\u01b0a ho\u00e0n thi\u1ec7n ph\u00eda sau. C\u1ea7n \u0111\u1ea7u t\u01b0 nhi\u1ec1u ngu\u1ed3n l\u1ef1c h\u01a1n \u0111\u1ec3 thu h\u1eb9p kho\u1ea3ng c\u00e1ch gi\u1eefa ngh\u1ec7 thu\u1eadt v\u00e0 k\u1ef9 thu\u1eadt.<\/li><\/ul><h2>Tr\u1edf l\u1ea1i Memoji &amp; Hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea7m l\u1eabn khi h\u1ea1 l\u00f4ng m\u00e0y<\/h2><p>Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf \u0111\u1ea7u b\u00e0i vi\u1ebft n\u00e0y, m\u1ed7i khi Memoji c\u1ed1 g\u1eafng sao ch\u00e9p n\u1ee5 c\u01b0\u1eddi c\u1ee7a t\u00f4i, c\u00f3 m\u1ed9t chi ti\u1ebft th\u1eeba l\u00e0 h\u1ea1 l\u00f4ng m\u00e0y \u1edf g\u00f3c trong c\u1ee7a l\u00f4ng m\u00e0y. L\u1ea1i m\u1ed9t l\u1ea7n n\u1eefa, chi ti\u1ebft n\u00e0y v\u1eabn xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u lo\u1ea1i n\u1ee5 c\u01b0\u1eddi kh\u00e1c nhau.<\/p><p>Bi\u1ec3u \u0111\u1ed3 d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 c\u00e1ch t\u01b0\u01a1ng t\u00e1c gi\u1eefa ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u v\u00e0 ngh\u1ec7 thu\u1eadt c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn c\u00e1c bi\u1ec3u c\u1ea3m kh\u00e1c nhau v\u00e0 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 h\u1ea1 l\u00f4ng m\u00e0y khi c\u01b0\u1eddi.<\/p><p><span style=\"text-decoration: underline;\">L\u01afU \u00dd<\/span>T\u1ea5t nhi\u00ean, c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u nguy\u00ean nh\u00e2n ti\u1ec1m \u1ea9n, bao g\u1ed3m c\u1ea3 v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn thu\u1eadt to\u00e1n; tuy nhi\u00ean, b\u1ea3n t\u00f3m t\u1eaft n\u00e0y \u0111\u01b0\u1ee3c l\u1eadp ra \u0111\u1ec3 l\u00e0m n\u1ed5i b\u1eadt m\u1ed9t t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 v\u1edbi m\u1ed9t b\u1ed9 \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2209aca elementor-widget elementor-widget-image\" data-id=\"2209aca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"527\" src=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2025\/03\/face-tracking-avatars-FACS-issues.webp?fit=900%2C527&amp;ssl=1\" class=\"attachment-large size-large wp-image-12234\" alt=\"S\u01a1 \u0111\u1ed3 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 theo d\u00f5i khu\u00f4n m\u1eb7t v\u00e0 avatar s\u1eed d\u1ee5ng c\u00e1c h\u00ecnh d\u1ea1ng FACS\" srcset=\"https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2025\/03\/face-tracking-avatars-FACS-issues.webp?w=900&amp;ssl=1 900w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2025\/03\/face-tracking-avatars-FACS-issues.webp?resize=300%2C176&amp;ssl=1 300w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2025\/03\/face-tracking-avatars-FACS-issues.webp?resize=768%2C450&amp;ssl=1 768w, https:\/\/i0.wp.com\/melindaozel.com\/wp-content\/uploads\/2025\/03\/face-tracking-avatars-FACS-issues.webp?resize=18%2C12&amp;ssl=1 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-615d487 elementor-widget elementor-widget-text-editor\" data-id=\"615d487\" 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>Ph\u00e2n t\u00edch chi ti\u1ebft<\/h2><p><em>Ng\u01b0\u1eddi nh\u0103n m\u0169i v\u00e0 nh\u1ea5c m\u00f4i tr\u00ean<\/em> l\u00e0 hai h\u00e0nh \u0111\u1ed9ng khu\u00f4n m\u1eb7t tr\u00f4ng gi\u1ed1ng nhau.<\/p><ul><li>Ch\u00fang th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi nhau \u1edf c\u1ea3 hai c\u1ea5p \u0111\u1ed9 thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 g\u1eafn nh\u00e3n d\u1eef li\u1ec7u.<\/li><li>V\u00ec c\u00e1c c\u00f4ng ty c\u00f4ng ngh\u1ec7 kh\u00f4ng \u0111\u1ea7u t\u01b0 \u0111\u1ee7 v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u, h\u1ecd th\u01b0\u1eddng kh\u00f4ng t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho nh\u00e2n vi\u00ean c\u00f3 kh\u1ea3 n\u0103ng x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c ho\u1eb7c gi\u1ea3i th\u00edch c\u00e1ch ph\u00e2n bi\u1ec7t. <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em> v\u00e0 <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em>.<\/li><li>Sai s\u00f3 trong c\u1ea3 qu\u00e1 tr\u00ecnh thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 g\u1eafn nh\u00e3n d\u1eef li\u1ec7u th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n, v\u00e0 nh\u00e2n vi\u00ean c\u00f3 chuy\u00ean m\u00f4n kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i theo d\u00f5i.<\/li><\/ul><p>M\u1ed9t k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn trong ngh\u1ec7 thu\u1eadt l\u00e0 s\u1eed d\u1ee5ng <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em> Nh\u01b0 m\u1ed9t ph\u1ee5 ki\u1ec7n h\u00ecnh d\u1ea1ng k\u1ebft h\u1ee3p cho n\u1ee5 c\u01b0\u1eddi.<\/p><ul><li>V\u00ec h\u00e0nh \u0111\u1ed9ng c\u1ee7a c\u01a1 k\u00e9o g\u00f3c m\u00f4i l\u00e0m n\u00e2ng m\u00f4i tr\u00ean khi n\u1ee5 c\u01b0\u1eddi tr\u1edf n\u00ean m\u00e3nh li\u1ec7t, nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng \u0111\u1ed9ng t\u00e1c n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi <em>Thi\u1ebft b\u1ecb n\u00e2ng m\u00f4i tr\u00ean.\u00a0<\/em>Kh\u00f4ng h\u1eb3n l\u00e0 \u0111\u01a1n gi\u1ea3n nh\u01b0 v\u1eady.<\/li><li>Nhi\u1ec1u ngh\u1ec7 s\u0129 s\u1eed d\u1ee5ng <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean\u00a0<\/em>H\u00ecnh d\u1ea1ng \u0111\u1ec3 k\u1ebft h\u1ee3p v\u1edbi\u00a0<em>D\u1ee5ng c\u1ee5 k\u00e9o g\u00f3c m\u00f4i <\/em>\u0110\u1ec3 t\u1ea1o n\u1ee5 c\u01b0\u1eddi r\u1ea1ng r\u1ee1. <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/melindaozel.com\/building-smiles-the-right-way\/\" target=\"_blank\" rel=\"noopener noreferrer\">Chi ti\u1ebft th\u00eam t\u1ea1i \u0111\u00e2y.<\/a><\/span><\/li><li>B\u1ecf qua c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1ea9m m\u1ef9 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c, m\u1ed9t v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i: N\u1ebfu <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em> li\u00ean quan \u0111\u1ebfn <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i,<\/em> Khi m\u1ed9t n\u1ee5 c\u01b0\u1eddi t\u01b0\u01a1i t\u1eafn \u0111\u01b0\u1ee3c b\u1eaft \u0111\u1ea7u, n\u00f3 s\u1ebd k\u00edch ho\u1ea1t <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean,<\/em> s\u1ebd k\u00edch ho\u1ea1t <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em>Do \u0111\u00f3, khi ai \u0111\u00f3 c\u01b0\u1eddi, l\u00f4ng m\u00e0y c\u1ee7a h\u1ecd s\u1ebd h\u1ea1 xu\u1ed1ng. X\u1ea5u.<\/li><\/ul><p>Ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c quan t\u00e2m \u0111\u1ee7.<br \/>Ngh\u1ec7 thu\u1eadt kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao nh\u01b0 n\u00f3 \u0111\u00e1ng \u0111\u01b0\u1ee3c.<\/p><h2>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/h2><p>Gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n nh\u1ea5t? <a href=\"https:\/\/melindaozel.com\/reasons-the-facs-manual-is-not-for-you\/\" target=\"_blank\" rel=\"noopener\"><b>H\u00e3y b\u1ecf qua FACS v\u00e0 t\u1eadp trung v\u00e0o gi\u1ea3i ph\u1eabu khu\u00f4n m\u1eb7t.<\/b><\/a> Gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 gi\u1ea3m t\u00ecnh tr\u1ea1ng nh\u1ea7m l\u1eabn d\u00e1ng m\u00e0y h\u1ea1 th\u1ea5p do<em> Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em> v\u00e0 <em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em> L\u00e0 \u0111\u1ec3 t\u00f4n vinh c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a c\u00e1c c\u01a1 b\u1eafp n\u1eb1m sau c\u00e1c h\u00e0nh \u0111\u1ed9ng n\u00e0y.<\/p><p>T\u1eeb g\u00f3c \u0111\u1ed9 gi\u1ea3i ph\u1eabu, c\u1ea3 hai c\u01a1 n\u00e2ng m\u00ed m\u1eaft tr\u00ean (levator palpebrae superioris)<em>C\u01a1 n\u00e2ng m\u00f4i tr\u00ean<\/em> c\u01a1) c\u0169ng nh\u01b0 c\u01a1 n\u00e2ng m\u00ed m\u1eaft tr\u00ean v\u00e0 c\u00e1nh m\u0169i (<em>Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em> C\u01a1 (c\u01a1) l\u00e0m h\u1ea1 l\u00f4ng m\u00e0y. Ch\u1ec9 trong ph\u1ea1m vi c\u00e1c quy t\u1eafc m\u00e3 h\u00f3a khu\u00f4n m\u1eb7t FACS, vi\u1ec7c h\u1ea1 l\u00f4ng m\u00e0y m\u1edbi \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi vi\u1ec7c nh\u0103n m\u0169i.\u00a0<\/p><p>B\u1ea1n c\u00f3 th\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c r\u1eafc r\u1ed1i n\u1ebfu ch\u1ec9 c\u1ea7n:<\/p><ol><li><strong>T\u00e1i thi\u1ebft k\u1ebf quy t\u1eafc ph\u00e2n lo\u1ea1i nh\u00e3n \u0111\u1ec3 ph\u00e2n lo\u1ea1i \"n\u00e2ng l\u00f4ng m\u00e0y\" th\u00e0nh m\u1ed9t h\u00e0nh \u0111\u1ed9ng ri\u00eang bi\u1ec7t so v\u1edbi <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em><\/strong><\/li><li><strong>T\u00e1i thi\u1ebft k\u1ebf c\u00e1c h\u00ecnh d\u1ea1ng pha tr\u1ed9n \u0111\u1ec3 ch\u1ee9a m\u1ed9t <em>Ng\u01b0\u1eddi nh\u0103n m\u0169i<\/em> kh\u00f4ng c\u00f3 s\u1ef1 h\u1ea1 th\u1ea5p l\u00f4ng m\u00e0y m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean<\/strong><\/li><\/ol>\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>T\u1ea1i sao c\u00e1c c\u00f4ng c\u1ee5 theo d\u00f5i khu\u00f4n m\u1eb7t v\u00e0 avatar l\u1ea1i g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea7m l\u1eabn khi ph\u00e1t hi\u1ec7n n\u1ebfp nh\u0103n tr\u00ean tr\u00e1n? Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 v\u00e0 \u0111\u1ec1 xu\u1ea5t m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n nh\u01b0ng hi\u1ec7u qu\u1ea3.<\/p>","protected":false},"author":60486633,"featured_media":2680,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[676756913,676756994,676756915,676757008,676756993],"tags":[676757222,676757219],"class_list":["post-2678","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-action-units","category-ar-vr","category-facial-expressions","category-free","category-tech","tag-face-tracking","tag-facial-action-coding-system-facs","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>ARKit &amp; Other Face Tracking Mistakes - Face the FACS | Facial Expressions in Animation, AI, &amp; Behavior<\/title>\n<meta name=\"description\" content=\"Why do face trackers and avatars suffer from false positive brow lowering? 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