{"id":277896,"date":"2025-06-05T16:47:21","date_gmt":"2025-06-05T09:47:21","guid":{"rendered":"https:\/\/divineshop.vn\/tin-tuc\/?p=277896"},"modified":"2025-06-09T09:03:07","modified_gmt":"2025-06-09T02:03:07","slug":"edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc","status":"publish","type":"post","link":"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/","title":{"rendered":"Edge Detection l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u k\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n bi\u00ean trong x\u1eed l\u00fd \u1ea3nh"},"content":{"rendered":"\n<p><strong>Edge Detection<\/strong> (ph\u00e1t hi\u1ec7n bi\u00ean) l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc ti\u1ec1n x\u1eed l\u00fd c\u01a1 b\u1ea3n v\u00e0 quan tr\u1ecdng trong th\u1ecb gi\u00e1c m\u00e1y t\u00ednh. K\u1ef9 thu\u1eadt n\u00e0y gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c ph\u00e2n t\u00edch \u1ea3nh b\u1eb1ng c\u00e1ch gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u01b0\u1ee3ng d\u1eef li\u1ec7u c\u1ea7n x\u1eed l\u00fd, \u0111\u1ed3ng th\u1eddi tr\u00edch xu\u1ea5t c\u00e1c th\u00f4ng tin v\u00e0 c\u1ea5u tr\u00fac quan tr\u1ecdng t\u1eeb h\u00ecnh \u1ea3nh.<\/p>\n\n\n\n<p>Theo b\u00e1o c\u00e1o c\u1ee7a <a href=\"https:\/\/www.mordorintelligence.com\/\">Mordor Intelligence<\/a>, th\u1ecb tr\u01b0\u1eddng th\u1ecb gi\u00e1c m\u00e1y t\u00ednh to\u00e0n c\u1ea7u \u0111\u01b0\u1ee3c d\u1ef1 \u0111o\u00e1n s\u1ebd \u0111\u1ea1t 39 t\u1ef7 USD v\u00e0o n\u0103m 2029, v\u1edbi t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng CAGR l\u00ean t\u1edbi 17,72%. Trong \u0111\u00f3, c\u00e1c k\u1ef9 thu\u1eadt x\u1eed l\u00fd \u1ea3nh nh\u01b0 Edge Detection \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t, gi\u00fap h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh nh\u1eadn di\u1ec7n v\u00e0 ph\u00e2n t\u00edch h\u00ecnh \u1ea3nh m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n. Nh\u1edd kh\u1ea3 n\u0103ng x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng trong \u1ea3nh, Edge Detection \u0111ang l\u00e0 n\u1ec1n t\u1ea3ng cho nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i, t\u1eeb nh\u1eadn di\u1ec7n khu\u00f4n m\u1eb7t \u0111\u1ebfn xe t\u1ef1 h\u00e0nh.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Edge_Detection_la_gi\" title=\"Edge Detection l\u00e0 g\u00ec?\">Edge Detection l\u00e0 g\u00ec?<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Cach_hoat_dong_cua_Edge_Detection\" title=\"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Edge Detection\">C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Edge Detection<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Cac_phuong_phap_pho_bien_trong_Edge_Detection\" title=\"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn trong Edge Detection\">C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn trong Edge Detection<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#1_Sobel_Edge_Detection\" title=\"1. Sobel Edge Detection\">1. Sobel Edge Detection<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#2_Laplacian_Edge_Detection\" title=\"2. Laplacian Edge Detection\">2. Laplacian Edge Detection<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#3_Prewitt_Edge_Detection\" title=\"3. Prewitt Edge Detection\">3. Prewitt Edge Detection<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#4_Roberts_Cross_Edge_Detection\" title=\"4. Roberts Cross Edge Detection\">4. Roberts Cross Edge Detection<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#5_Canny_Edge_Detection\" title=\"5. Canny Edge Detection\">5. Canny Edge Detection<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Uu_va_nhuoc_diem_cua_Edge_Detection\" title=\"\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Edge Detection\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Edge Detection<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Uu_diem\" title=\"\u01afu \u0111i\u1ec3m:\">\u01afu \u0111i\u1ec3m:<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Nhuoc_diem\" title=\"Nh\u01b0\u1ee3c \u0111i\u1ec3m:\">Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#Ung_dung_cua_Edge_Detection\" title=\"\u1ee8ng d\u1ee5ng c\u1ee7a Edge Detection\">\u1ee8ng d\u1ee5ng c\u1ee7a Edge Detection<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#1_Thi_giac_may_tinh\" title=\"1. Th\u1ecb gi\u00e1c m\u00e1y t\u00ednh\">1. Th\u1ecb gi\u00e1c m\u00e1y t\u00ednh<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#2_Chan_doan_hinh_anh_y_te\" title=\"2. Ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh y t\u1ebf\">2. Ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh y t\u1ebf<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#3_Cong_nghe_xe_tu_lai\" title=\"3. C\u00f4ng ngh\u1ec7 xe t\u1ef1 l\u00e1i\">3. C\u00f4ng ngh\u1ec7 xe t\u1ef1 l\u00e1i<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/divineshop.vn\/tin-tuc\/edge-detection-la-gi-tim-hieu-ky-thuat-phat-hien-bien-trong-xu-ly-anh-%ef%bf%bc\/#4_Phan_mem_chinh_sua_anh\" title=\"4. Ph\u1ea7n m\u1ec1m ch\u1ec9nh s\u1eeda \u1ea3nh\">4. Ph\u1ea7n m\u1ec1m ch\u1ec9nh s\u1eeda \u1ea3nh<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 id=\"h-edge-detection-la-gi\"><span class=\"ez-toc-section\" id=\"Edge_Detection_la_gi\"><\/span><strong>Edge Detection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Edge Detection l\u00e0 k\u1ef9 thu\u1eadt trong x\u1eed l\u00fd \u1ea3nh s\u1ed1, cho ph\u00e9p x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong \u1ea3nh th\u00f4ng qua vi\u1ec7c ph\u00e1t hi\u1ec7n s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t v\u1ec1 m\u00e0u s\u1eafc, \u0111\u1ed9 s\u00e1ng ho\u1eb7c k\u1ebft c\u1ea5u. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1eaft ng\u01b0\u1eddi ph\u00e2n bi\u1ec7t v\u1eadt th\u1ec3 qua h\u00ecnh d\u00e1ng v\u00e0 \u00e1nh s\u00e1ng, m\u00e1y t\u00ednh s\u1eed d\u1ee5ng thu\u1eadt to\u00e1n \u0111\u1ec3 ph\u00e2n t\u00edch nh\u1eefng bi\u1ebfn \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 gi\u1eefa c\u00e1c \u0111i\u1ec3m \u1ea3nh. Khi c\u00f3 s\u1ef1 thay \u0111\u1ed5i l\u1edbn, thu\u1eadt to\u00e1n s\u1ebd nh\u1eadn di\u1ec7n \u0111\u00f3 l\u00e0 m\u1ed9t \u201cbi\u00ean\u201d \u2013 t\u1ee9c \u0111\u01b0\u1eddng vi\u1ec1n c\u1ee7a v\u1eadt th\u1ec3. \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh h\u00ecnh d\u1ea1ng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong \u1ea3nh, ph\u1ee5c v\u1ee5 nhi\u1ec1u \u1ee9ng d\u1ee5ng nh\u01b0: nh\u1eadn di\u1ec7n khu\u00f4n m\u1eb7t, ph\u00e2n t\u00edch y t\u1ebf, h\u1ed7 tr\u1ee3 h\u1ec7 th\u1ed1ng l\u00e1i t\u1ef1 \u0111\u1ed9ng,&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/vnptai.io\/storage\/thumbnail\/edge-detection-la-gi.jpg\" alt=\"Edge Detection l\u00e0 g\u00ec\"\/><\/figure>\n\n\n\n<h2 id=\"h-cach-ho\u1ea1t-d\u1ed9ng-c\u1ee7a-edge-detection\"><span class=\"ez-toc-section\" id=\"Cach_hoat_dong_cua_Edge_Detection\"><\/span><strong>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Edge Detection d\u1ef1a tr\u00ean vi\u1ec7c ph\u00e1t hi\u1ec7n s\u1ef1 thay \u0111\u1ed5i nhanh v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 s\u00e1ng gi\u1eefa c\u00e1c \u0111i\u1ec3m \u1ea3nh l\u00e2n c\u1eadn. C\u00e1c thu\u1eadt to\u00e1n ph\u1ed5 bi\u1ebfn nh\u01b0 <strong>Sobel<\/strong>, <strong>Prewitt<\/strong>, <strong>Canny<\/strong> s\u1ebd qu\u00e9t qua \u1ea3nh \u0111\u1ec3 t\u00ecm c\u00e1c v\u00f9ng c\u00f3 m\u1ee9c \u0111\u1ed9 thay \u0111\u1ed5i cao, t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng bi\u00ean.<\/p>\n\n\n\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 l\u1ecdc ph\u00e1t hi\u1ec7n bi\u00ean \u0111\u1ec3 khu\u1ebfch \u0111\u1ea1i s\u1ef1 kh\u00e1c bi\u1ec7t s\u00e1ng \u2013 t\u1ed1i, gi\u00fap l\u00e0m n\u1ed5i b\u1eadt ranh gi\u1edbi gi\u1eefa c\u00e1c v\u00f9ng trong \u1ea3nh. \u0110\u1eb7c bi\u1ec7t, v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a thi\u1ebft b\u1ecb Edge Computing, Edge Detection c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u1ef1c ti\u1ebfp tr\u00ean thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i, t\u1ed1i \u01b0u h\u00f3a t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd cho c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/lh7-us.googleusercontent.com\/docsz\/AD_4nXe9ibMYNb_laXp9i0KeCfSJaAfdfvviWqrZB_SaU8vUitrlwaHN6_2j2zH4SVlOqpLJM5U-iGFeiNbjFfFnXYUi37l4rgAVjPkoo8hDdQwkzFNdkexD6G7ScpFuoqO-bkvcqJJRnWxtORnb7xWgA9XhRmGwUkOknL-vss_vEBXGLDvghnWxSXw?key=_zOgKB67hShNQ0Rwg2k-Gg\" alt=\"Edge Detection in Image Processing: An Introduction\"\/><\/figure>\n\n\n\n<h2 id=\"h-cac-ph\u01b0\u01a1ng-phap-ph\u1ed5-bi\u1ebfn-trong-edge-detection\"><span class=\"ez-toc-section\" id=\"Cac_phuong_phap_pho_bien_trong_Edge_Detection\"><\/span><strong>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn trong Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 id=\"h-1-sobel-edge-detection\"><span class=\"ez-toc-section\" id=\"1_Sobel_Edge_Detection\"><\/span><strong>1. Sobel Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Sobel l\u00e0 m\u1ed9t trong nh\u1eefng thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n bi\u00ean ph\u1ed5 bi\u1ebfn nh\u1ea5t. D\u1ef1a tr\u00ean \u0111\u1ea1o h\u00e0m b\u1eadc nh\u1ea5t, Sobel s\u1eed d\u1ee5ng hai b\u1ed9 l\u1ecdc 3&#215;3 theo tr\u1ee5c ngang v\u00e0 d\u1ecdc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 s\u00e1ng. Tuy gi\u00fap l\u00e0m m\u1ecbn \u1ea3nh v\u00e0 gi\u1ea3m nhi\u1ec5u nh\u1ecf, Sobel v\u1eabn d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u trong \u1ea3nh \u0111\u1ea7u v\u00e0o.<\/p>\n\n\n\n<h3 id=\"h-2-laplacian-edge-detection\"><span class=\"ez-toc-section\" id=\"2_Laplacian_Edge_Detection\"><\/span><strong>2. Laplacian Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Kh\u00f4ng gi\u1ed1ng Sobel ch\u1ec9 ph\u00e1t hi\u1ec7n theo h\u01b0\u1edbng ngang\/d\u1ecdc, Laplacian s\u1eed d\u1ee5ng \u0111\u1ea1o h\u00e0m b\u1eadc hai \u0111\u1ec3 ph\u00e1t hi\u1ec7n bi\u00ean theo m\u1ecdi h\u01b0\u1edbng. Tuy nhi\u00ean, n\u00f3 r\u1ea5t nh\u1ea1y v\u1edbi nhi\u1ec5u n\u00ean th\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi b\u1ed9 l\u1ecdc Gaussian \u0111\u1ec3 l\u00e0m m\u1edd \u1ea3nh tr\u01b0\u1edbc khi x\u1eed l\u00fd.<\/p>\n\n\n\n<h3 id=\"h-3-prewitt-edge-detection\"><span class=\"ez-toc-section\" id=\"3_Prewitt_Edge_Detection\"><\/span><strong>3. Prewitt Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Prewitt c\u0169ng l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean \u0111\u1ea1o h\u00e0m, c\u00f3 c\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n h\u01a1n Sobel v\u00e0 x\u1eed l\u00fd nhanh h\u01a1n. Tuy nhi\u00ean, kh\u1ea3 n\u0103ng kh\u1eed nhi\u1ec5u k\u00e9m n\u00ean ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u t\u1ed1c \u0111\u1ed9 nh\u01b0ng kh\u00f4ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/p>\n\n\n\n<h3 id=\"h-4-roberts-cross-edge-detection\"><span class=\"ez-toc-section\" id=\"4_Roberts_Cross_Edge_Detection\"><\/span><strong>4. Roberts Cross Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n bi\u00ean s\u1edbm nh\u1ea5t, s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 l\u1ecdc 2&#215;2 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 theo \u0111\u01b0\u1eddng ch\u00e9o. V\u1edbi t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd nhanh, Roberts Cross ph\u00f9 h\u1ee3p cho c\u00e1c thi\u1ebft b\u1ecb IoT ho\u1eb7c camera c\u00f3 t\u00e0i nguy\u00ean h\u1ea1n ch\u1ebf.<\/p>\n\n\n\n<h3 id=\"h-5-canny-edge-detection\"><span class=\"ez-toc-section\" id=\"5_Canny_Edge_Detection\"><\/span><strong>5. Canny Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Canny \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t trong nh\u1eefng thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n bi\u00ean t\u1ed1t nh\u1ea5t hi\u1ec7n nay. N\u00f3 g\u1ed3m nhi\u1ec1u giai \u0111o\u1ea1n nh\u01b0 l\u00e0m m\u1edd \u1ea3nh, t\u00ednh gradient, tri\u1ec7t ti\u00eau \u0111i\u1ec3m kh\u00f4ng c\u1ef1c \u0111\u1ea1i v\u00e0 \u00e1p d\u1ee5ng ng\u01b0\u1ee1ng k\u00e9p \u0111\u1ec3 l\u1ecdc ra bi\u00ean ch\u00ednh x\u00e1c. Canny n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng gi\u1eef n\u00e9t v\u00e0 lo\u1ea1i b\u1ecf nhi\u1ec5u hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/pub.mdpi-res.com\/electronics\/electronics-10-00655\/article_deploy\/html\/images\/electronics-10-00655-g001.png?1616144455\" alt=\"Sobel Edge Detection Based on Weighted Nuclear Norm Minimization Image  Denoising\"\/><\/figure>\n\n\n\n<h2 id=\"h-\u01b0u-va-nh\u01b0\u1ee3c-di\u1ec3m-c\u1ee7a-edge-detection\"><span class=\"ez-toc-section\" id=\"Uu_va_nhuoc_diem_cua_Edge_Detection\"><\/span><strong>\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 id=\"h-\u01b0u-di\u1ec3m\"><span class=\"ez-toc-section\" id=\"Uu_diem\"><\/span><strong>\u01afu \u0111i\u1ec3m:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul><li><strong>Tr\u00edch xu\u1ea5t th\u00f4ng tin c\u1ea5u tr\u00fac:<\/strong> Gi\u00fap x\u00e1c \u0111\u1ecbnh h\u00ecnh d\u1ea1ng, v\u1ecb tr\u00ed v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c v\u1eadt th\u1ec3.<\/li><li><strong>Ti\u1ec1n \u0111\u1ec1 cho tr\u00edch xu\u1ea5t \u0111\u1eb7c tr\u01b0ng n\u00e2ng cao:<\/strong> Nh\u01b0 g\u00f3c, \u0111\u01b0\u1eddng vi\u1ec1n, ph\u1ee5c v\u1ee5 cho nh\u1eadn d\u1ea1ng v\u00e0 theo d\u00f5i \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li><li><strong>H\u1ed7 tr\u1ee3 ph\u00e2n \u0111o\u1ea1n h\u00ecnh \u1ea3nh:<\/strong> Gi\u00fap t\u00e1ch \u1ea3nh th\u00e0nh c\u00e1c v\u00f9ng c\u00f3 \u00fd ngh\u0129a kh\u00e1c nhau.<\/li><\/ul>\n\n\n\n<h3 id=\"h-nh\u01b0\u1ee3c-di\u1ec3m\"><span class=\"ez-toc-section\" id=\"Nhuoc_diem\"><\/span><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul><li><strong>D\u1ec5 nhi\u1ec5u:<\/strong> C\u00e1c chi ti\u1ebft kh\u00f4ng mong mu\u1ed1n d\u1ec5 b\u1ecb nh\u1ea7m l\u00e0 bi\u00ean th\u1eadt.<\/li><li><strong>Bi\u00ean kh\u00f4ng li\u00ean t\u1ee5c:<\/strong> \u1ea2nh c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p d\u1ec5 g\u00e2y \u0111\u1ee9t g\u00e3y \u0111\u01b0\u1eddng bi\u00ean.<\/li><li><strong>Ph\u1ee5 thu\u1ed9c tham s\u1ed1:<\/strong> C\u1ea7n tinh ch\u1ec9nh ng\u01b0\u1ee1ng v\u00e0 b\u1ed9 l\u1ecdc \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1i \u01b0u.<\/li><\/ul>\n\n\n\n<h2 id=\"h-\u1ee9ng-d\u1ee5ng-c\u1ee7a-edge-detection\"><span class=\"ez-toc-section\" id=\"Ung_dung_cua_Edge_Detection\"><\/span><strong>\u1ee8ng d\u1ee5ng c\u1ee7a Edge Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 id=\"h-1-th\u1ecb-giac-may-tinh\"><span class=\"ez-toc-section\" id=\"1_Thi_giac_may_tinh\"><\/span><strong>1. Th\u1ecb gi\u00e1c m\u00e1y t\u00ednh<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Edge Detection l\u00e0 n\u1ec1n t\u1ea3ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 nh\u1eadn di\u1ec7n khu\u00f4n m\u1eb7t, t\u00e1i t\u1ea1o \u1ea3nh 3D, ph\u00e1t hi\u1ec7n chuy\u1ec3n \u0111\u1ed9ng,&#8230; Nh\u1edd kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n ranh gi\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng, k\u1ef9 thu\u1eadt n\u00e0y gi\u00fap m\u00e1y t\u00ednh &#8220;nh\u00ecn&#8221; v\u00e0 hi\u1ec3u th\u1ebf gi\u1edbi gi\u1ed1ng nh\u01b0 con ng\u01b0\u1eddi.<\/p>\n\n\n\n<h3 id=\"h-2-ch\u1ea9n-doan-hinh-\u1ea3nh-y-t\u1ebf\"><span class=\"ez-toc-section\" id=\"2_Chan_doan_hinh_anh_y_te\"><\/span><strong>2. Ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh y t\u1ebf<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>K\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n bi\u00ean gi\u00fap l\u00e0m r\u00f5 ranh gi\u1edbi gi\u1eefa c\u00e1c m\u00f4, c\u01a1 quan ho\u1eb7c kh\u1ed1i u trong \u1ea3nh y khoa (X-quang, MRI, CT), gi\u00fap b\u00e1c s\u0129 \u0111\u01b0a ra ch\u1ea9n \u0111o\u00e1n ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n\n\n\n<h3 id=\"h-3-cong-ngh\u1ec7-xe-t\u1ef1-lai\"><span class=\"ez-toc-section\" id=\"3_Cong_nghe_xe_tu_lai\"><\/span><strong>3. C\u00f4ng ngh\u1ec7 xe t\u1ef1 l\u00e1i<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Edge Detection gi\u00fap nh\u1eadn di\u1ec7n l\u00e0n \u0111\u01b0\u1eddng, bi\u1ec3n b\u00e1o v\u00e0 ch\u01b0\u1edbng ng\u1ea1i v\u1eadt, \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u01b0\u1edbng v\u00e0 x\u1eed l\u00fd t\u00ecnh hu\u1ed1ng nhanh ch\u00f3ng, ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h3 id=\"h-4-ph\u1ea7n-m\u1ec1m-ch\u1ec9nh-s\u1eeda-\u1ea3nh\"><span class=\"ez-toc-section\" id=\"4_Phan_mem_chinh_sua_anh\"><\/span><strong>4. Ph\u1ea7n m\u1ec1m ch\u1ec9nh s\u1eeda \u1ea3nh<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong c\u00e1c ph\u1ea7n m\u1ec1m nh\u01b0 Photoshop, Edge Detection h\u1ed7 tr\u1ee3 ch\u1ecdn v\u00f9ng \u1ea3nh ch\u00ednh x\u00e1c, l\u00e0m s\u1eafc n\u00e9t chi ti\u1ebft, t\u00e1ch n\u1ec1n v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng ch\u1ec9nh s\u1eeda.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/res.cloudinary.com\/samueljames\/image\/upload\/v1586523484\/Screenshot_2020-04-10_at_14.57.40.png\" alt=\"Edge Detection Techniques - Image Processing with OpenCV | Hubofcode\"\/><\/figure>\n\n\n\n<p>Edge Detection l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt quan tr\u1ecdng v\u00e0 kh\u00f4ng th\u1ec3 thi\u1ebfu trong x\u1eed l\u00fd \u1ea3nh hi\u1ec7n \u0111\u1ea1i. V\u1edbi kh\u1ea3 n\u0103ng x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng, n\u00f3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng cho h\u00e0ng lo\u1ea1t \u1ee9ng d\u1ee5ng th\u1ecb gi\u00e1c m\u00e1y t\u00ednh, y t\u1ebf, giao th\u00f4ng th\u00f4ng minh,&#8230; Trong b\u1ed1i c\u1ea3nh AI v\u00e0 th\u1ecb gi\u00e1c m\u00e1y ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, c\u00e1c thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n bi\u00ean s\u1ebd ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u v\u00e0 m\u1edf r\u1ed9ng \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n h\u01a1n n\u1eefa.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/divineshop.vn\/search?q=AI\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" width=\"728\" height=\"240\" src=\"https:\/\/divineshop.vn\/tin-tuc\/wp-content\/uploads\/2025\/12\/AI-Chatbot-2-1.png\" alt=\"\" class=\"wp-image-286362\" srcset=\"https:\/\/divineshop.vn\/tin-tuc\/wp-content\/uploads\/2025\/12\/AI-Chatbot-2-1.png 728w, https:\/\/divineshop.vn\/tin-tuc\/wp-content\/uploads\/2025\/12\/AI-Chatbot-2-1-300x99.png 300w, https:\/\/divineshop.vn\/tin-tuc\/wp-content\/uploads\/2025\/12\/AI-Chatbot-2-1-150x49.png 150w, https:\/\/divineshop.vn\/tin-tuc\/wp-content\/uploads\/2025\/12\/AI-Chatbot-2-1-696x229.png 696w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><\/a><\/figure>\n\n\n\n<!--nextpage-->\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-bottom\"\n    data-payload=\"{&quot;align&quot;:&quot;right&quot;,&quot;id&quot;:&quot;277896&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;66&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;4.4&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\\u0110\\u00c1NH GI\\u00c1 B\\u00c0I VI\\u1ebeT&quot;,&quot;legend&quot;:&quot;4.4\\\/5 - (66 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;width&quot;:&quot;125.1&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}\">\n    \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 125.1px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n    \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            4.4\/5 - (66 votes)    <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Edge Detection (ph\u00e1t hi\u1ec7n bi\u00ean) l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc ti\u1ec1n x\u1eed l\u00fd c\u01a1 b\u1ea3n v\u00e0 quan tr\u1ecdng trong th\u1ecb gi\u00e1c m\u00e1y t\u00ednh. K\u1ef9 thu\u1eadt n\u00e0y gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c ph\u00e2n t\u00edch \u1ea3nh b\u1eb1ng c\u00e1ch gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u01b0\u1ee3ng d\u1eef li\u1ec7u c\u1ea7n x\u1eed l\u00fd, \u0111\u1ed3ng th\u1eddi tr\u00edch xu\u1ea5t c\u00e1c th\u00f4ng tin v\u00e0 c\u1ea5u tr\u00fac [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":277898,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[5407],"tags":[38,5362,190],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.1 (Yoast SEO v18.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"Edge Detection (ph\u00e1t hi\u1ec7n bi\u00ean) l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc ti\u1ec1n x\u1eed l\u00fd c\u01a1 b\u1ea3n v\u00e0 quan tr\u1ecdng trong th\u1ecb gi\u00e1c m\u00e1y t\u00ednh. 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