{"id":527,"date":"2019-11-26T09:37:26","date_gmt":"2019-11-26T02:37:26","guid":{"rendered":"http:\/\/ainoodle.tech\/?p=527"},"modified":"2019-11-26T09:37:26","modified_gmt":"2019-11-26T02:37:26","slug":"nhan-dien-bien-so-xe-chuong-3-phat-hien-bien-so-bang-opencv-thuan","status":"publish","type":"post","link":"https:\/\/miai.vn\/?p=527","title":{"rendered":"[Nh\u1eadn di\u1ec7n bi\u1ec3n s\u1ed1 xe] Ch\u01b0\u01a1ng 3 \u2013 Ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 b\u1eb1ng OpenCV thu\u1ea7n"},"content":{"rendered":"\n<p>Xin ch\u00e0o anh em M\u00ec Ai! M\u1ed9t tu\u1ea7n m\u1edbi l\u1ea1i \u0111\u1ebfn, ch\u00fac anh em nhi\u1ec1u h\u1ee9ng kh\u1edfi v\u00e0 th\u00e0nh c\u00f4ng nh\u00e9. Trong 2 ch\u01b0\u01a1ng tr\u01b0\u1edbc <strong><a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/miai.vn\/2019\/11\/12\/nhan-dien-bien-so-xe-chuong-1-phat-hien-bien-so-xe-bang-pretrain-model-yolo\/\" target=\"_blank\">t\u1ea1i \u0111\u00e2y<\/a><\/strong> v\u00e0 <strong><a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/miai.vn\/2019\/11\/20\/nhan-dien-bien-so-xe-chuong-2-phat-hien-bien-so-xe-bang-pretrain-wpod-net\/\" target=\"_blank\">t\u1ea1i \u0111\u00e2y<\/a><\/strong> m\u00ecnh \u0111\u00e3 guide anh em c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c pretrain model \u0111\u1ec3 nh\u1eadn di\u1ec7n bi\u1ec3n s\u1ed1. C\u00e1ch n\u00e0y c\u00f3 l\u1ee3i th\u1ebf l\u00e0 nhanh g\u1ecdn tuy nhi\u00ean trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3, m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3 v\u1ec1 \u00e1nh s\u00e1ng, k\u00edch th\u01b0\u1edbc bi\u1ec3n s\u1ed1 trong h\u00ecnh&#8230; th\u00ec l\u1ea1i c\u00f3 th\u1ec3 (m\u00ecnh n\u00f3i c\u00f3 th\u1ec3 th\u00f4i nh\u00e9) nh\u1eadn di\u1ec7n kh\u00f4ng \u0111\u00fang v\u1edbi \u00fd \u0111\u1ed3 c\u1ee7a c\u00e1c b\u1ea1n. Do \u0111\u00f3, h\u00f4m nay m\u00ecnh xin gi\u1edbi thi\u1ec7u th\u00eam m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 b\u1eb1ng OpenCV thu\u1ea7n.<\/p>\n\n\n\n<p>V\u1edbi c\u00e1ch n\u00e0y c\u00e1c b\u1ea1n s\u1ebd ph\u1ea3i l\u00e0m nhi\u1ec1u h\u01a1n nh\u01b0ng l\u1ea1i c\u00f3 th\u1ec3 t\u00f9y bi\u1ebfn tho\u1ea3i m\u00e1i theo \u00fd m\u00ecnh cho ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<p>R\u1ed3i, ch\u00fang ta b\u1eaft \u0111\u1ea7u!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n 1 &#8211; Chu\u1ea9n b\u1ecb nguy\u00ean v\u1eadt li\u1ec7u n\u1ea5u M\u00ec<\/h2>\n\n\n\n<p>C\u00e1c b\u1ea1n t\u1ea1o th\u01b0 m\u1ee5c MiAI_LP_Detection_3 \u0111\u1ec3 l\u01b0u c\u00e1c th\u1ee9 li\u00ean quan \u0111\u1ebfn b\u00e0i n\u00e0y. Sau \u0111\u00f3 ch\u1ea1y l\u1ec7nh git \u0111\u1ec3 l\u1ea5y project m\u00ecnh \u0111\u00e3 vi\u1ebft v\u1ec1:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">git clone https:\/\/github.com\/thangnch\/MiAI_LP_Detection_3 .<\/pre>\n\n\n\n<p>Done! \u0110\u1ee3i ch\u00fat l\u00e0 &#8220;git c\u1edd l\u00f4n&#8221; v\u1ec1 lu\u00f4n. B\u00e2y gi\u1edd c\u00e1c b\u1ea1n ti\u1ebfn h\u00e0nh c\u00e0i \u0111\u1eb7t c\u00e1c th\u01b0 vi\u1ec7n c\u1ea7n thi\u1ebft b\u1eb1ng l\u1ec7nh:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">pip install -r setup.txt<\/pre>\n\n\n\n<p>C\u00e1c th\u01b0 vi\u1ec7n sau s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh c\u00e0i \u0111\u1eb7t t\u1ef1 \u0111\u1ed9ng:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">opencv-python\nimutils\nnumpy<\/pre>\n\n\n\n<p>C\u00e1c b\u1ea1n \u0111\u1ee3i m\u1ed9t ch\u00fat \u0111\u1ec3 c\u00e1c th\u01b0 vi\u1ec7n c\u00e0i \u0111\u1eb7t xong l\u00e0 c\u00f3 th\u1ec3 move sang b\u01b0\u1edbc sau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n 2- T\u01b0 t\u01b0\u1edfng thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/xsaptec.com\/wordpress\/wp-content\/uploads\/2015\/12\/License-Plate-Recognition-Image-10-12-15.jpg\" alt=\"ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1\"\/><\/figure>\n\n\n\n<p>Tuy l\u00e0 m\u00ec \u0103n li\u1ec1n nh\u01b0ng ch\u00fang ta s\u1ebd c\u00f9ng nhau \u0111\u1ea3o qua l\u00fd thuy\u1ebft t\u00fd nh\u00e9. B\u00e0i n\u00e0y c\u01a1 b\u1ea3n s\u1ebd l\u00e0m c\u00e1c b\u01b0\u1edbc nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>B\u01b0\u1edbc 1.\u0110\u1ecbnh ngh\u0129a v\u00e0i th\u00f4ng s\u1ed1 cho b\u00e0i to\u00e1n<\/strong> nh\u01b0: K\u00edch th\u01b0\u1edbc bi\u1ec3n s\u1ed1 l\u1edbn nh\u1ea5t v\u00e0 k\u00edch th\u01b0\u1edbc bi\u1ec3n s\u1ed1 nh\u1ecf nh\u1ea5t. C\u00e1c b\u1ea1n t\u00f9y b\u00e0i to\u00e1n m\u00e0 \u0111\u1ecbnh ngh\u0129a. V\u00ed d\u1ee5 b\u00e0i to\u00e1n tr\u00f4ng xe v\u00e0o b\u00e3i th\u00ec camera \u0111\u1ec3 g\u1ea7n, k\u00edch th\u01b0\u1edbc bi\u1ec3n s\u1ed1 to h\u01a1n nh\u01b0ng n\u1ebfu b\u00e0i to\u00e1n nh\u1eadn di\u1ec7n xe \u0111i qua c\u1eeda b\u1eb1ng camera tr\u00ean cao ch\u1eb3ng h\u1ea1n th\u00ec k\u00edch th\u01b0\u1edbc bi\u1ec3n s\u1ed1 s\u1ebd nh\u1ecf h\u01a1n. Ch\u00fang ta t\u00f9y v\u00e0o hi\u1ec7n tr\u01b0\u1eddng th\u1ef1c t\u1ebf m\u00e0 tinh ch\u1ec9nh cho ph\u00f9 h\u1ee3p.<\/li><li><strong>B\u01b0\u1edbc 2. <\/strong>Load \u1ea3nh v\u00e0 th\u1ef1c hi\u1ec7n reszie v\u1ec1 k\u00edch th\u01b0\u1edbc mong mu\u1ed1n.<\/li><li><strong>B\u01b0\u1edbc 3<\/strong>. Chuy\u1ec3n v\u1ec1 \u0111en tr\u1eafng v\u00e0 th\u1ef1c hi\u1ec7n thu\u1eadt to\u00e1n t\u00ecm c\u1ea1nh b\u0103ng Canny (chi ti\u1ebft c\u00e1c b\u1ea1n \u0111\u1ecdc <strong><a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/docs.opencv.org\/2.4\/doc\/tutorials\/imgproc\/imgtrans\/canny_detector\/canny_detector.html\" target=\"_blank\">t\u1ea1i \u0111\u00e2y<\/a><\/strong>)<\/li><li><strong>B\u01b0\u1edbc 4. <\/strong>T\u00ecm c\u00e1c contour c\u00f3 trong h\u00ecnh (c\u00e1c b\u1ea1n c\u1ee9 h\u00ecnh d\u00f9ng l\u00e0 c\u00e1c \u0111\u01b0\u1eddng bao k\u00edn quanh c\u00e1c v\u00f9ng tr\u1eafng trong h\u00ecnh). Chi ti\u1ebft v\u1ec1 l\u00fd thuy\u1ebft contour th\u00ec \u0111\u00e3 c\u00f3 OpenCV t\u00e0i tr\u1ee3 <strong><a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/docs.opencv.org\/3.4\/dd\/d49\/tutorial_py_contour_features.html\" target=\"_blank\">t\u1ea1i \u0111\u00e2y<\/a><\/strong>.<\/li><li><strong>B\u01b0\u1edbc 5.<\/strong> V\u1edbi c\u00e1c contour t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 4, ch\u00fang ta l\u1eb7p qua 1 l\u01b0\u1ee3t v\u00e0 ch\u1ecdn contour l\u1edbn nh\u1ea5t h\u1ed9i \u0111\u1ee7 c\u00e1c \u0111i\u1ec1u ki\u1ec7n:<ul><li>C\u00f3 4 c\u1ea1nh (sau khi \u0111\u00e3 approx): v\u00ec bi\u1ec3n s\u1ed1 l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 4 c\u1ea1nh.<\/li><li>C\u00f3 k\u00edch th\u01b0\u1edbc n\u1eb1m trong v\u00f9ng k\u00edch th\u01b0\u1edbc \u0111\u00e3 \u0111\u1ecbnh ngh\u0129a \u1edf b\u01b0\u1edbc 1.<\/li><li>Contour \u0111\u00f3 s\u1ebd l\u00e0 bi\u1ec3n s\u1ed1 ch\u00fang ta c\u1ea7n t\u00ecm.<\/li><\/ul><\/li><li><strong>B\u01b0\u1edbc 6.<\/strong> Ti\u1ebfn h\u00e0nh t\u00ecm c\u00e1c \u0111i\u1ec3m g\u00f3c c\u1ee7a contour n\u00f3i tr\u00ean v\u00e0 tr\u00edch h\u00ecnh \u1ea3nh bi\u1ec3n s\u1ed1 ra kh\u1ecfi h\u00ecnh \u1ea3nh c\u1ea3 xe.<\/li><\/ul>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<!-- InPost_Ad -->\n<ins class=\"adsbygoogle\"\n     style=\"display:block\"\n     data-ad-client=\"ca-pub-5095883280136027\"\n     data-ad-slot=\"7735063137\"\n     data-ad-format=\"auto\"\n     data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<p>V\u1eady th\u00f4i! M\u00ecnh \u0111\u00e3 c\u1ed1 g\u1eafng di\u1ec5n gi\u1ea3i \u0111\u1ec3 sao cho d\u1ec5 hi\u1ec3u nh\u1ea5t, n\u1ebfu v\u1eabn c\u00f2n l\u0103n t\u0103n, c\u00e1c b\u1ea1n c\u1ee9 post l\u00ean group M\u00ec AI \u0111\u1ec3 trao \u0111\u1ed5i th\u00eam nh\u00e9 (Group trao \u0111\u1ed5i, chia s\u1ebb: <a rel=\"noreferrer noopener\" aria-label=\"https:\/\/www.facebook.com\/groups\/miaigroup (opens in a new tab)\" href=\"https:\/\/www.facebook.com\/groups\/miaigroup\" target=\"_blank\">https:\/\/www.facebook.com\/groups\/miaigroup<\/a> ).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n 3 &#8211; Ti\u1ebfn h\u00e0nh vi\u1ebft code ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1<\/h2>\n\n\n\n<p>V\u1edbi t\u01b0 t\u01b0\u1edfng thu\u1eadt to\u00e1n n\u00f3i tr\u00ean, c\u00e1c b\u1ea1n m\u1edf file <strong>detect_lp.py<\/strong> ra \u0111\u1ec3 xem code nh\u00e9. M\u00ecnh \u0111\u00e3 comment \u0111\u1ea7y \u0111\u1ee7 t\u1eebng \u0111o\u1ea1n code, c\u00e1c b\u1ea1n xem k\u1ef9 l\u00fd thuy\u1ebft \u1edf tr\u00ean l\u00e0 s\u1ebd hi\u1ec3u ngay code c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/github.com\/thangnch\/MiAI_LP_Detection_3\/blob\/master\/Screen%20Shot%202019-11-26%20at%204.15.25%20PM.png?raw=true\" alt=\"ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n 4 &#8211;  Ch\u1ea1y th\u1eed ch\u01b0\u01a1ng tr\u00ecnh<\/h2>\n\n\n\n<p>C\u00e1c b\u1ea1n ch\u1ea1y file <strong>detect_lp.py<\/strong>, ch\u00fa \u00fd \u0111\u1ed5i \u0111\u01b0\u1eddng d\u1eabn file \u1ea3nh \u1edf d\u00f2ng cv2.imread cho ph\u00f9 h\u1ee3p nh\u00e9.<\/p>\n\n\n\n<p>N\u1ebfu m\u1ecdi th\u1ee9 okie, c\u00e1c b\u1ea1n s\u1ebd th\u1ea5y m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb nh\u01b0 sau:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/github.com\/thangnch\/MiAI_LP_Detection_3\/blob\/master\/Screen%20Shot%202019-11-26%20at%204.19.22%20PM.png?raw=true\" alt=\"ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1\"\/><\/figure>\n\n\n\n<p>Well, nh\u01b0 v\u1eady sau 3 b\u00e0i v\u1ec1 ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1, c\u00e1c b\u1ea1n \u0111\u00e3 bi\u1ebft c\u00e1ch ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 trong \u1ea3nh b\u1eb1ng c\u00e1c pretrain YOLO, WPOD-NET v\u00e0 b\u1eb1ng OpenCV thu\u1ea7n. Trong c\u00e1c b\u00e0i ti\u1ebfp theo ch\u00fang ta s\u1ebd \u0111i t\u00ecm hi\u1ec3u c\u00e1c c\u00e1ch kh\u00e1c nhau \u0111\u1ec3  nh\u1eadn di\u1ec7n c\u00e1c k\u00ed t\u1ef1 tr\u00ean bi\u1ec3n s\u1ed1 nh\u00e9. H\u1eb9n g\u1eb7p l\u1ea1i c\u00e1c b\u1ea1n!<\/p>\n\n\n\n<p><strong>H\u00e3y gia nh\u1eadp c\u00f9ng M\u00ec Ai nh\u00e9!<\/strong><\/p>\n\n\n\n<p>Fanpage:&nbsp;<a rel=\"noreferrer noopener\" href=\"http:\/\/facebook.com\/miaiblog\" target=\"_blank\">http:\/\/facebook.com\/miaiblog<\/a><br>Group trao \u0111\u1ed5i, chia s\u1ebb:&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/www.facebook.com\/groups\/miaigroup\" target=\"_blank\">https:\/\/www.facebook.com\/groups\/miaigroup<\/a><br>Website:&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/miai.vn\/\" target=\"_blank\">https:\/\/miai.vn\/<\/a><br>Youtube:&nbsp;<a rel=\"noreferrer noopener\" href=\"http:\/\/bit.ly\/miaiyoutube\" target=\"_blank\">http:\/\/bit.ly\/miaiyoutube<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Xin ch\u00e0o anh em M\u00ec Ai! M\u1ed9t tu\u1ea7n m\u1edbi l\u1ea1i \u0111\u1ebfn, ch\u00fac anh em nhi\u1ec1u h\u1ee9ng kh\u1edfi v\u00e0 th\u00e0nh c\u00f4ng nh\u00e9. Trong 2 ch\u01b0\u01a1ng tr\u01b0\u1edbc t\u1ea1i \u0111\u00e2y v\u00e0 t\u1ea1i \u0111\u00e2y m\u00ecnh \u0111\u00e3 guide anh em c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c pretrain model \u0111\u1ec3 nh\u1eadn di\u1ec7n bi\u1ec3n s\u1ed1. C\u00e1ch n\u00e0y c\u00f3 l\u1ee3i th\u1ebf l\u00e0 nhanh g\u1ecdn tuy [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[19,30,21,124,125,126,127,23,128,31,32,34],"class_list":["post-527","post","type-post","status-publish","format-standard","hentry","category-computer-vision","tag-ai","tag-darknet","tag-deep-learning","tag-license-plate-detect","tag-license-plate-recognition","tag-lp-detect","tag-lp-recognize","tag-machine-learning","tag-nhan-dien-bien-so","tag-object-detection","tag-python","tag-train"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 trong \u1ea3nh b\u1eb1ng OpenCV thu\u1ea7n - M\u00ec AI<\/title>\n<meta name=\"description\" content=\"M\u00ecnh \u0111\u00e3 guide anh em c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c pretrain \u0111\u1ec3 nh\u1eadn di\u1ec7n bi\u1ec3n s\u1ed1 v\u00e0 h\u00f4m nay m\u00ecnh xin gi\u1edbi thi\u1ec7u th\u00eam m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 b\u1eb1ng OpenCV thu\u1ea7n\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/miai.vn\/?p=527\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ph\u00e1t hi\u1ec7n bi\u1ec3n s\u1ed1 trong \u1ea3nh b\u1eb1ng OpenCV thu\u1ea7n - 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