{"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\/ms\/arkit-other-face-tracking-mistakes\/","title":{"rendered":"ARKit &amp; Kesilapan Penjejakan Muka Lain"},"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>Mengapa begitu banyak penjejak wajah dan avatar mengalami pengesanan penurunan kening palsu? Dengan menggunakan Apple ARKit sebagai kajian kes, analisis ini meneroka punca masalah dan mendedahkan penyelesaian yang mengejutkan kesederhanaannya pada penghujungnya.\u00a0<\/em><\/p><h2>Avatar &amp; Senyuman: Edisi Memoji<\/h2><p>Positif palsu penurunan kening adalah isu yang meluas dalam penjejakan wajah dan animasi avatar. Walaupun halus, ralat ini boleh memutarbelitkan ekspresi avatar, memperkenalkan petunjuk yang tidak disengajakan untuk kesedihan, kemarahan, atau kebimbangan. Dalam video di bawah, saya menguji ketahanan Memoji Apple untuk menunjukkan masalah ini secara langsung.<\/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=ms-MY&#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>Dalam klip di atas, perhatikan bagaimana Memoji saya \u201cmencerminkan\u201d senyuman saya. Ada apa-apa yang pelik atau tidak menyenangkan? Sudut dalam kening saya diturunkan secara silap. Penambahan penurunan kening yang tersalah atribut ini berterusan dalam pelbagai jenis senyuman. Ia juga berterusan pada pengguna lain.<\/p><p>Kening dalam yang diturunkan digabungkan dengan bibir atas yang terangkat (disebabkan oleh <em>penyipit hidung <\/em>atau <em>Pengangkat Bibir Atas<\/em>) sering dikaitkan dengan emosi yang tidak menyenangkan. Titik hujung kening yang lebih rendah juga berkorelasi negatif dengan senyuman. Jenis-jenis kesilapan penjejakan yang signifikan secara semantik ini boleh secara tidak sengaja menyiratkan sentimen negatif.<\/p><h2>Bagaimana Kesilapan Ini Terjadi<\/h2><p>Kejadian positif palsu penurunan kening sering berpunca daripada isu kualiti data, kesilapan pelabelan, dan pilihan artistik. Berikut sebab mengapa masalah ini berterusan:<\/p><ol><li>Tiada tumpuan yang mencukupi terhadap kualiti data.<\/li><li>Tiada tumpuan yang mencukupi terhadap seni.<\/li><\/ol><p>Di mana-mana tempat saya pernah bekerja, terdapat begitu banyak kebimbangan mengenai pengambilan jurutera dengan latar belakang tertentu sehingga <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\">Jumlah kakitangan diambil daripada peranan penting lain.<\/a><\/span><\/p><p>Banyak ketua teknikal menganggap bahawa jika mereka memperoleh data yang mencukupi untuk melatih model mereka, masalah kualiti akan selesai dengan sendirinya. Wow! Sihir. Anggapan ini sering beroperasi di bawah kepercayaan tambahan (tetapi salah) bahawa hanya terdapat peratusan yang sangat kecil data tidak tulen.<\/p><p>Saya telah lama bekerja mendalam dalam pengolahan data dan telah memegang hampir semua peranan bukan kejuruteraan dalam penjejakan wajah:<\/p><ul><li><strong>perancangan data<\/strong> \u2013 menentukan jenis data ekspresi yang hendak dikumpul dan cara mengumpulkannya<\/li><li><strong>pengumpulan data<\/strong> \u2013 sebenarnya bekerja dengan peserta dan melatih mereka untuk membuat pose ekspresi yang betul<\/li><li><strong>Anotasi data<\/strong> \u2013 menentukan cara terbaik untuk menandakan mercu tanda<\/li><li><strong>klasifikasi data<\/strong> \u2013 menasihati kejuruteraan tentang kelas mana yang perlu wujud, apakah parameter mereka, dan bagaimana mengendalikan kes sempadan mereka yang tidak dapat dielakkan<\/li><li><strong>peningkatan skala<\/strong> \u2013 memastikan peraturan untuk anotasi dan klasifikasi disatukan dan mudah difahami oleh pelabel skala besar<\/li><li><strong>pemantauan penjejakan<\/strong> \u2013 membandingkan nilai rujukan dengan keputusan penjejakan<\/li><li><strong>mengidentifikasi bidang untuk penambahbaikan<\/strong> \u2013 mengenal pasti masalah yang wujud dan bagaimana ia boleh diperbaiki melalui perancangan, pengumpulan, anotasi, dan\/atau pengelasan<\/li><li><strong>pembangunan avatar<\/strong> \u2013 merangka strategi bentuk mana yang perlu diutamakan berdasarkan gabungan pertimbangan seperti \u2013<ul><li>di mana penjejak gagal<\/li><li>Apakah kes penggunaan produk akhir?<\/li><li>apa yang akan paling menyenangkan dari segi estetika<\/li><li>apa yang paling penting secara semantik<\/li><\/ul><\/li><\/ul><p>Dengan latar belakang saya dalam sains ekspresi, anatomi wajah, dan kerja meluas dengan data wajah, saya boleh mengatakan dengan yakin bahawa data tidak tulen adalah isu besar dalam penjejakan wajah, bukan isu kecil. Ringkasnya, walaupun algoritma itu sempurna, masalah timbul daripada:<\/p><p><strong>Data Posen Tidak Tahir<\/strong><\/p><ul><li>Apabila mengumpul data ekspresi berpose daripada peserta manusia, data itu akan sentiasa tercemar. Dijamin.<\/li><li>Kebanyakan orang tidak dapat menghasilkan setiap ekspresi sasaran. Sukar untuk mendapatkan data aksi wajah tulen. Apabila peserta menghasilkan ekspresi tidak tulen, ia kerana mereka sama ada mempamerkan aksi wajah yang salah atau tidak dapat mengasingkan ekspresi sasaran tanpa menggunakan otot wajah tambahan yang bukan sasaran.<\/li><li>Lebih-lebih lagi, pemungut data sering kali tidak dapat menentukan sama ada peserta pun mencapai ungkapan sasaran. Kekurangan pengetahuan ini bukan kerana kesalahan pemungut data, tetapi sebaliknya berpunca daripada keutamaan yang salah di Syarikat X dan kurangnya perhatian dalam merekrut atau mengekalkan bakat yang tepat.<\/li><\/ul><p><strong>Penyalahlabelan Data<\/strong><\/p><ul><li>Disebabkan tumpuan berlebihan terhadap bakat kejuruteraan, syarikat biasanya mengabaikan keutamaan peranan pelabelan data. Sebaliknya, usaha anotasi sering dianggap sebagai jawatan peringkat rendah yang diperuntukkan kepada kontraktor tanpa kepakaran khusus.<\/li><li>Kontraktor yang baru bermula dengan pengalaman yang sedikit akhirnya boleh menjadi begitu selaras dengan data sehingga memperoleh kepakaran; bagaimanapun, ini jarang berlaku kerana peranan pelabelan kontrak biasanya mempunyai kadar perputaran pekerja yang tinggi.<\/li><\/ul><p><strong>Pilihan Seni Tanpa Maklumat<\/strong><\/p><ul><li>Adalah penting bagi seni untuk memahami teknologi, dan bagi teknologi untuk memahami seni. Terdapat jurang yang amat besar antara seni dan kejuruteraan dalam syarikat teknologi. Dalam banyak kes, penjejak yang baik kelihatan hebat bukan kerana penjejak itu sendiri, tetapi kerana pilihan seni yang dibuat untuk mengatasi teknologi yang masih belum matang di sebalik tabir. Lebih banyak sumber harus dilaburkan untuk merapatkan jurang antara seni dan kejuruteraan.<\/li><\/ul><h2>Kembali ke Memoji &amp; Penurunan kening positif palsu<\/h2><p>Seperti yang disebutkan pada permulaan catatan ini, setiap kali Memoji cuba mencerminkan senyuman saya, ia menambah penurunan kening pada sudut dalam kening saya secara tidak perlu. Sekali lagi, penambahan ini berterusan dalam pelbagai jenis senyuman.<\/p><p>Graf di bawah adalah contoh bagaimana interaksi antara kualiti data dan seni boleh menjejaskan pelbagai ekspresi secara negatif dan menyebabkan masalah seperti kening yang turun semasa tersenyum.<\/p><p><span style=\"text-decoration: underline;\">CATATAN<\/span>Sudah tentu terdapat pelbagai punca berpotensi, termasuk masalah pada algoritma itu sendiri; bagaimanapun, rangka ini dibuat untuk menonjolkan satu senario khusus dengan satu set syarat tertentu.<\/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=\"diagram isu penjejakan wajah dan avatar menggunakan bentuk 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>Memecahkannya<\/h2><p><em>Pengkerut hidung dan pengangkat bibir atas<\/em> Terdapat dua aksi wajah yang kelihatan serupa.<\/p><ul><li>Mereka sering dikelirukan antara satu sama lain pada tahap pengumpulan data dan tahap pelabelan data.<\/li><li>Kerana syarikat teknologi tidak melabur dengan betul dalam kualiti data, mereka biasanya tidak memupuk pekerja yang dapat mengenal pasti dengan tepat atau menerangkan cara membezakan <em>penyipit hidung<\/em> dan <em>Pengangkat Bibir Atas<\/em>.<\/li><li>Kesilapan dalam pengumpulan data dan pelabelan data terlepas pandang, dan bakat tidak dapat mengesan kesilapan penjejakan.<\/li><\/ul><p>Teknik biasa dalam seni ialah menggunakan <em>Pengangkat Bibir Atas<\/em> sebagai tambahan bentuk gabungan untuk senyuman.<\/p><ul><li>Kerana tindakan penarik sudut bibir mengangkat bibir atas apabila senyuman begitu lebar, ramai menganggap gerakan ini sinonim dengan <em>pengangkat bibir atas.\u00a0<\/em>Ia tidak semudah itu.<\/li><li>Banyak artis menggunakan <em>Pengangkat Bibir Atas\u00a0<\/em>bentuk untuk digabungkan dengan\u00a0<em>penarik sudut bibir <\/em>untuk mencipta senyuman yang kuat. <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/melindaozel.com\/building-smiles-the-right-way\/\" target=\"_blank\" rel=\"noopener noreferrer\">Lebih banyak butiran di sini.<\/a><\/span><\/li><li>Selain isu estetika dan ketepatan, satu masalah ketara masih wujud: Jika <em>Pengangkat Bibir Atas<\/em> berkaitan dengan <em>penykerut hidung,<\/em> Apabila senyuman lebar dimulakan, ia akan diaktifkan. <em>pengangkat bibir atas,<\/em> yang kemudian akan diaktifkan <em>penyipit hidung<\/em>. Oleh itu, apabila seseorang tersenyum, keningnya akan turun. Buruk.<\/li><\/ul><p>Tidak cukup perhatian diberikan kepada kualiti data.<br \/>Seni tidak diberi pengiktirafan yang mencukupi.<\/p><h2>Membaiki Masalah<\/h2><p>Pembetulan paling mudah? <a href=\"https:\/\/melindaozel.com\/reasons-the-facs-manual-is-not-for-you\/\" target=\"_blank\" rel=\"noopener\"><b>Berpalinglah daripada FACS dan bergantunglah pada anatomi wajah.<\/b><\/a> Penyelesaian paling mudah untuk mengurangkan penurunan kening palsu positif melalui<em> penyipit hidung<\/em> dan <em>Pengangkat Bibir Atas<\/em> adalah untuk menghormati sifat-sifat otot-otot di sebalik tindakan-tindakan ini.<\/p><p>Dari sudut pandang anatomi, kedua-duanya levator palpebrae superioris (<em>Pengangkat Bibir Atas<\/em> otot) atau levator palpebrae superioris alaeque nasi (<em>penyipit hidung<\/em> otot) menurunkan kening. Hanya dalam lingkungan peraturan pengekodan muka FACS, penurunan kening dikaitkan dengan kedutan hidung.\u00a0<\/p><p>Anda boleh menjimatkan diri daripada sakit kepala jika anda hanya:<\/p><ol><li><strong>Reka semula peraturan pelabelan anda untuk mengklasifikasikan 'brow lowerer' sebagai tindakan berasingan daripada <em>penyipit hidung<\/em><\/strong><\/li><li><strong>Reka semula bentuk campuran anda untuk menjadi tuan rumah kepada <em>penyipit hidung<\/em> tanpa menurunkan kening secara semula jadi<\/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>Mengapa penjejak wajah dan avatar mengalami positif palsu penurunan kening? Di sini kami meneroka punca sebenar dan menawarkan penyelesaian yang mengejutkan kesederhanaannya.<\/p>","protected":false},"author":60486633,"featured_media":2680,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"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 v27.8 (Yoast SEO v27.8) - 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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