{"id":45201,"date":"2021-06-22T10:00:49","date_gmt":"2021-06-22T01:00:49","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=45201"},"modified":"2021-06-22T10:00:49","modified_gmt":"2021-06-22T01:00:49","slug":"%ec%95%88%eb%93%9c%eb%a1%9c%ec%9d%b4%eb%93%9c%eb%a1%9c-%eb%b0%b0%ec%9a%b0%eb%8a%94-opencv-%ec%ba%90%eb%8b%88-%ec%97%a3%ec%a7%80-%ea%b2%80%ec%b6%9c%ea%b8%b0canny-edge-detector","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=45201","title":{"rendered":"[\uc548\ub4dc\ub85c\uc774\ub4dc\ub85c \ubc30\uc6b0\ub294 OpenCV] \uce90\ub2c8 \uc5e3\uc9c0 \uac80\ucd9c\uae30(Canny Edge Detector)"},"content":{"rendered":"<h1>Canny Edge Detector<\/h1>\n<p>\uce90\ub2c8 \uc5e3\uc9c0 \uac80\ucd9c\uae30\ub294 John Canny\uac00 1986\ub144\uc5d0 \ub17c\ubb38\uc5d0\uc11c \ubc1c\ud45c\ud55c \ub0b4\uc6a9\uc73c\ub85c <a href=\"https:\/\/www.charlezz.com\/?p=45203\">\ub77c\ud50c\ub77c\uc2a4 \ud544\ud130<\/a> \ubc29\uc2dd\uc744 \uc0c1\ub2f9\ud788 \uac1c\uc120\ud588\ub2e4.\u00a0<\/p>\n<p>J. Canny\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 3\uac00\uc9c0 \uc870\uac74\uc744 \ucda9\uc871\ud558\ub294 \uc5e3\uc9c0 \uac80\ucd9c\uae30\ub97c \ub9cc\ub4e4\uace0\uc790 \ud588\ub2e4.<\/p>\n<ul>\n<li><strong>Good detection<\/strong><br \/>\n&#8211; \uc5e3\uc9c0\uac00 \uc544\ub2cc \uc810\uc744 \uc5e3\uc9c0\ub85c \ucc3e\uac70\ub098 \ub610\ub294 \uc5e3\uc9c0\uc778\ub370 \uc5e3\uc9c0\ub85c \ucc3e\uc9c0 \ubabb\ud558\ub294 \ud655\ub960\uc744 \ucd5c\uc18c\ud654\ud55c\ub2e4.<\/p>\n<\/li>\n<li><strong>Good localization<\/strong><br \/>\n&#8211; \uc2e4\uc81c \uc5e3\uc9c0\uc758 \uc911\uc2ec\ubd80\ubd84\uc744 \uac80\ucd9c\ud55c\ub2e4.<\/p>\n<\/li>\n<li><strong>Single edge<br \/>\n<\/strong>&#8211; \ud558\ub098\uc758 \uc5e3\uc9c0\ub294 \ud558\ub098\uc758 \uc810\uc73c\ub85c \ud45c\ud604\ud55c\ub2e4.<\/li>\n<\/ul>\n<p>\uc774\ub7ec\ud55c \uc804\uc81c \uc870\uac74\uc744 \ucda9\uc871\uc2dc\ud0a4\uae30 \uc704\ud574 \ucd1d 4\ub2e8\uacc4\uc5d0 \uac78\uce5c \ubcf5\ud569\uc801\uc778 \uc54c\uace0\ub9ac\uc998\uc744 \ub9cc\ub4e4\uc5c8\ub2e4.<\/p>\n<h4>1\ub2e8\uacc4 \ub178\uc774\uc988 \uc904\uc774\uae30<\/h4>\n<p>\uc774\ubbf8\uc9c0\uc5d0\uc11c \uc5e3\uc9c0 \uac80\ucd9c\uc740 \ub178\uc774\uc988\uc5d0 \ubbfc\uac10\ud558\uae30 \ub54c\ubb38\uc5d0 \uc6b0\uc120 \ub178\uc774\uc988\ub97c \uc81c\uac70\ud558\ub294 \uac83\uc774 \uc911\uc694\ud558\ub2e4. \uccab\ubc88\uc9f8 \uacfc\uc815\uc73c\ub85c 5&#215;5 \uac00\uc6b0\uc2dc\uc548 \ud544\ud130\ub97c \uc774\ubbf8\uc9c0\uc5d0 \uc801\uc6a9\ud558\uc5ec \ub178\uc774\uc988\ub97c \uc904\uc778\ub2e4.\u00a0<\/p>\n<h4>2\ub2e8\uacc4 \uadf8\ub798\ub514\uc5b8\ud2b8 \uacc4\uc0b0<\/h4>\n<p>\ubd80\ub4dc\ub7ec\uc6cc\uc9c4 \uc774\ubbf8\uc9c0\ub294 \uc218\ud3c9 \uadf8\ub9ac\uace0 \uc218\uc9c1 \ubc29\ud5a5\uc73c\ub85c \uc18c\ubca8 \ucee4\ub110\uc744 \ud1b5\ud574 \ud544\ud130\ub9c1\ud55c\ub2e4. \ud544\ud130\ub41c \ub450 \uc774\ubbf8\uc9c0\ub97c \ud1b5\ud574 \uadf8\ub798\ub514\uc5b8\ud2b8\uc758 \ud06c\uae30\uc640 \ubc29\ud5a5\uc744 \uad6c\ud560 \uc218 \uc788\uac8c \ub41c\ub2e4.<\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-300x281.png\" alt=\"\" width=\"300\" height=\"281\" class=\"alignnone wp-image-45212 size-medium\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-300x281.png 300w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot.png 530w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>\uadf8\ub77c\ub370\uc774\uc158\uc758 \ubc29\ud5a5\uc744 \ub2e8\uc21c\ud654 \ud558\uae30 \uc704\ud574 \uc218\uc9c1, \uc218\ud3c9, \ub300\uac01\uc120 \ubc29\ud5a5\uc744 \ub098\ud0c0\ub124\ub294 \ub124 \uac01\ub3c4 \uc911 \ud558\ub098\ub85c \ubc18\uc62c\ub9bc \ud55c\ub2e4.<\/p>\n<h4>3\ub2e8\uacc4 \ube44\ucd5c\ub300 \uc5b5\uc81c (Non-maximum Suppression)\u00a0<\/h4>\n<p>\uadf8\ub798\ub514\uc5b8\ud2b8\uc758 \ud06c\uae30\uc640 \ubc29\ud5a5\uc744 \uc5bb\uace0 \ub09c \ud6c4, \ud558\ub098\uc758 \uc5e3\uc9c0\uac00 \uc5ec\ub7ec\uac1c\uc758 \ud53d\uc140\ub85c \ud45c\ud604\ub418\ub294 \ud604\uc0c1\uc744 \uc5c6\uc560\uae30 \uadf8\ub798\ub514\uc5b8\ud2b8 \ud06c\uae30\uac00 \uad6d\uc9c0\uc801 \ucd5c\ub300(local maximum)\uc778 \ud53d\uc140\ub9cc\uc744 \uc5e3\uc9c0 \ud53d\uc140\ub85c \uc120\uc815\ud55c\ub2e4.<\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1-1024x424.png\" alt=\"\" width=\"750\" height=\"311\" class=\"alignnone size-large wp-image-45213\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1-1024x424.png 1024w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1-300x124.png 300w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1-768x318.png 768w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-1.png 1240w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><\/p>\n<h4>4\ub2e8\uacc4 \ud788\uc2a4\ud14c\ub9ac\uc2dc\uc2a4 \uc5e3\uc9c0 \ud2b8\ub798\ud0b9(Hysteresis edge tracking)<\/h4>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-hysteresis.jpg\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-hysteresis.jpg\" alt=\"\" width=\"450\" height=\"263\" class=\"alignnone size-full wp-image-45214\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-hysteresis.jpg 450w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-hysteresis-300x175.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2-1024x367.png\" alt=\"\" width=\"750\" height=\"269\" class=\"alignnone size-large wp-image-45215\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2-1024x367.png 1024w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2-300x108.png 300w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2-768x275.png 768w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-2.png 1412w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><\/p>\n<p>\uc774 \ub2e8\uacc4\uc5d0\uc11c\ub294 \uc5e3\uc9c0\uac00 \uc2e4\uc81c\ub85c \uc5e3\uc9c0\uc778\uc9c0 \uc544\ub2cc\uc9c0\ub97c \uacb0\uc815\ud55c\ub2e4. \uc774\ub97c \uc704\ud574 \ucd5c\uc19f\uac12 \ubc0f \ucd5c\ub313\uac12\uc758 \uc784\uacc4 \uac12\uc774 \ud544\uc694\ud558\ub2e4. \uadf8\ub798\ub514\uc5b8\ud2b8\uc758 \uac15\ub3c4\uac00 \ucd5c\ub313\uac12\ubcf4\ub2e4 \ud06c\uba74 \uc5e3\uc9c0\uac00 \ub418\uace0, \ucd5c\uc19f\uac12 \ubcf4\ub2e4 \uc791\uc73c\uba74 \ubc84\ub824\uc9c4\ub2e4. \ucd5c\uc19f\uac12\uacfc \ucd5c\ub313\uac12\uc758 \uacbd\uacc4 \uc0ac\uc774\uc5d0 \uc788\ub294 \uac12\ub4e4\uc740 \ub2e4\ub978 \uc5e3\uc9c0\uc640\uc758 \uc5f0\uacb0\uc131\uc744 \ud655\uc778\ud558\uc5ec \ucd5c\uc885\uc801\uc778 \uc5e3\uc9c0\ub85c \uc120\uc815\ud55c\ub2e4.<\/p>\n<p>OpenCV\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 Canny \ud568\uc218\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<pre class=\"\">Imgproc.Canny(Mat image<span>, <\/span>Mat edges<span>, double <\/span>threshold1<span>, double <\/span>threshold2)<\/pre>\n<pre class=\"\">image : \uc785\ub825 \uc601\uc0c1\r\nedges : \ucd9c\ub825 \uc601\uc0c1\r\nthreshold1 : \ucd5c\uc18c \uc784\uacc4\uac12 \r\nthreshold2 : \ucd5c\ub300 \uc784\uacc4\uac12\r\n<\/pre>\n<p>\ub808\ub098 \uc774\ubbf8\uc9c0\ub97c Grayscale\ub85c \ubcc0\uacbd\ud558\uace0, \ucd5c\uc18c\uac12 50, \ucd5c\ub300\uac12 100\uacfc \ud568\uaed8 Canny \ud568\uc218\ub97c \uc801\uc6a9\ud55c \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.\u00a0<\/p>\n<p><a href=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3-438x1024.png\" alt=\"\" width=\"438\" height=\"1024\" class=\"alignnone size-large wp-image-45216\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3-438x1024.png 438w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3-128x300.png 128w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3-768x1794.png 768w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2021\/06\/www.charlezz.com-opencv-canny-edge-detector-screenshot-3.png 900w\" sizes=\"(max-width: 438px) 100vw, 438px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Canny Edge Detector \uce90\ub2c8 \uc5e3\uc9c0 \uac80\ucd9c\uae30\ub294 John Canny\uac00 1986\ub144\uc5d0 \ub17c\ubb38\uc5d0\uc11c \ubc1c\ud45c\ud55c \ub0b4\uc6a9\uc73c\ub85c \ub77c\ud50c\ub77c\uc2a4 \ud544\ud130 \ubc29\uc2dd\uc744 \uc0c1\ub2f9\ud788 \uac1c\uc120\ud588\ub2e4.\u00a0 J. Canny\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 3\uac00\uc9c0 \uc870\uac74\uc744 \ucda9\uc871\ud558\ub294 \uc5e3\uc9c0 \uac80\ucd9c\uae30\ub97c \ub9cc\ub4e4\uace0\uc790 \ud588\ub2e4. Good detection &#8211; \uc5e3\uc9c0\uac00 \uc544\ub2cc \uc810\uc744 \uc5e3\uc9c0\ub85c \ucc3e\uac70\ub098 \ub610\ub294 \uc5e3\uc9c0\uc778\ub370 \uc5e3\uc9c0\ub85c \ucc3e\uc9c0 \ubabb\ud558\ub294 \ud655\ub960\uc744 \ucd5c\uc18c\ud654\ud55c\ub2e4. Good localization &#8211; \uc2e4\uc81c \uc5e3\uc9c0\uc758 \uc911\uc2ec\ubd80\ubd84\uc744 \uac80\ucd9c\ud55c\ub2e4. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[27],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45201"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=45201"}],"version-history":[{"count":1,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45201\/revisions"}],"predecessor-version":[{"id":45217,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45201\/revisions\/45217"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=45201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=45201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}