{"id":6808,"date":"2019-05-05T18:14:07","date_gmt":"2019-05-05T09:14:07","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=6808"},"modified":"2020-05-28T11:36:02","modified_gmt":"2020-05-28T02:36:02","slug":"python%ea%b3%bc-opencv-31-fastfeatures-from-accelerated-segment-test%ec%9d%84-%ec%9d%b4%ec%9a%a9%ed%95%9c-%ec%9d%b4%eb%af%b8%ec%a7%80%ec%9d%98-%ed%8a%b9%ec%a7%95%ec%a0%90-%ec%b6%94","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=6808","title":{"rendered":"Python\uacfc OpenCV \u2013 35 : FAST(Features from Accelerated Segment Test)\uc744 \uc774\uc6a9\ud55c \uc774\ubbf8\uc9c0\uc758 \ud2b9\uc9d5\uc810 \ucd94\ucd9c"},"content":{"rendered":"<p>\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 https:\/\/docs.opencv.org\/3.0-beta\/doc\/py_tutorials\/py_feature2d\/py_fast\/py_fast.html \uc785\ub2c8\ub2e4.<\/p>\n<p>\uc774\ubbf8\uc9c0\uc5d0\uc11c \ud2b9\uc9d5\uc810\uc744 \ucd94\ucd9c\ud574 \ub0b4\ub294 \ub2e4\uc591\ud55c \ubc29\ubc95\uc774 \uc788\uc9c0\ub9cc, \uadf8 \uc18d\ub3c4\uba74\uc5d0\uc11c \uc544\uc26c\uc6c0\uc774 \uc788\uc5c8\uace0 \uc815\ud655\ub3c4\ub97c \ud76c\uc0dd\ud558\ub294 \ub300\uc2e0 \ube60\ub978 \uc18d\ub3c4\ub85c \ud2b9\uc9d5\uc810\uc744 \ucd94\ucd9c\ud558\ub294 \ubc29\ubc95\uc73c\ub85c 2006\ub144\uc5d0 FAST\uac00 \ucc98\uc74c \uc81c\uc548\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uc778\uacf5\uc9c0\ub2a5\uc758 \uae30\uacc4\ud559\uc2b5\uc5d0\uc11c\ub3c4 \ud65c\uc6a9\ub41c\ub2e4\uace0 \ud569\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ud2b9\uc815 \ud654\uc18c \uc778\uadfc\uc758 \ud654\uc18c\uac12\uc744 16\uac1c \ubf51\uace0 \ud2b9\uc815 \ud654\uc18c\uc758 \ud654\uc18c\uac12\uc774 \uc778\uadfc\uc758 16\uac1c\uc758 \ud654\uc18c\uac12\uc5d0 \uc784\uacc4\uce58\uac12(t)\uc744 \ub354\ud55c \uac12\ubcf4\ub2e4 \ud06c\uac70\ub098 \uc784\uacc4\uce58\uac12\uc744 \ube80 \uac12\ubcf4\ub2e4 \uc791\uc740 \uc778\uadfc\ud654\uc18c\uc758 \uac1c\uc218\uc5d0 \ub530\ub77c \ud2b9\uc9d5\uc810\uc778\uc9c0\ub97c \uacb0\uc815\ud558\ub294 \ub9e4\uc6b0 \ub2e8\uc21c\ud55c \ubc29\uc2dd\uc785\ub2c8\ub2e4. \uc5ec\uae30\uc5d0 \ub354\uc6b1 \uc18d\ub3c4\ub97c \ud5a5\uc0c1\uc2dc\ud0a4\uae30 \uc704\ud574 16\uac1c\uc758 \uc778\uadfc\ud654\uc18c\uac00 \uc544\ub2cc 4\uac1c\uc758 \uc778\uadfc\ud654\uc18c\ub97c \ud65c\uc6a9\ud55c\ub2e4\uac70\ub098, \ud2b9\uc9d5\uc810\uc774 \ube44\uc2b7\ud55c \ubd80\ubd84\uc5d0\uc11c \ub108\ubb34 \ub9ce\uc774 \ucd94\ucd9c\ub418\ub294 \uac83\uc744 \ubc29\uc9c0\ud558\uae30 \uc704\ud574 \uc5b5\uc81c(Non-maximal Suppression)\ud558\ub294 \ub4f1\uc774 \uc808\ucc28\uac00 \uc801\uc6a9\ub418\uae30\ub3c4 \ud569\ub2c8\ub2e4. \ub2e4\ub978 \ubc29\uc2dd\uc5d0 \ube44\ud574 \ud2b9\uc9d5\uc810 \ucd94\ucd9c\uc758 \uc815\ud655\ub3c4\ub97c \ub5a8\uc5b4\uc9c0\uc9c0\ub9cc \uc2e4\uc2dc\uac04\uc5d0\uc11c \ud65c\uc6a9\ud560 \uc218 \uc788\ub294 \uc18d\ub3c4\ub97c \uc81c\uacf5\ud558\uba74\uc11c \uc5b4\ub290 \uc815\ub3c4\uc758 \ud2b9\uc9d5\uc810 \ucd94\ucd9c \ubc29\ubc95\uc73c\ub85c \uc0ac\uc6a9\ub41c\ub2e4\uace0 \ud569\ub2c8\ub2e4.<\/p>\n<p>OpneCV\uc5d0\uc11c \uc774 FAST \ud2b9\uc9d5\uc810 \ucd94\ucd9c\uc5d0 \ub300\ud55c API \uc608\uc81c\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nimport numpy as np\r\nimport cv2\r\nfrom matplotlib import pyplot as plt\r\n\r\nfilename = '.\/data\/butterfly.jpg'\r\nimg = cv2.imread(filename,0)\r\n\r\nfast = cv2.FastFeatureDetector_create()\r\n\r\nkp = fast.detect(img,None)\r\nimg2=cv2.drawKeypoints(img,kp,None)\r\n\r\nprint(\"Threshold: \", fast.getThreshold())\r\nprint(\"nonmaxSuppression: \", fast.getNonmaxSuppression())\r\nprint(\"neighborhood: \", fast.getType())\r\nprint(\"Total Keypoints with nonmaxSuppression: \", len(kp))\r\n\r\ncv2.imshow('img2', img2)\r\n\r\ncv2.waitKey()\r\ncv2.destroyAllWindows()\r\n<\/pre>\n<p>\uc2e4\ud589\uacb0\uacfc\ub294 \uc544\ub798\uc640 \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/2019\/05\/FAST_1.png\" alt=\"\" width=\"496\" height=\"389\" class=\"aligncenter size-full wp-image-6809\" \/><\/p>\n<p>\ucf58\uc194\uc5d0 \ucd9c\ub825\ub41c \uacb0\uacfc\ub294 \uc544\ub798\uc640 \uac19\uc740\ub370\uc694.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nThreshold:  10\r\nnonmaxSuppression:  True\r\nneighborhood:  2\r\nTotal Keypoints with nonmaxSuppression:  4992\r\n<\/code>\r\n\r\n<p>\uc778\uadfc \ud53d\uc140 \ud654\uc18c\uac12 \ube44\uad50\ub97c \uc704\ud55c \uc784\uacc4\uce58 \uae30\ubcf8\uac12\uc740 10\uc774\uace0 \ube44\uc2b7\ud55c \uc9c0\uc810\uc5d0\uc11c \ub108\ubb34 \ub9ce\uc740 \ud2b9\uc9d5\uc810\uc774 \ucd94\ucd9c\ub418\ub294 \uac83\uc744 \ubc29\uc9c0\ud558\uae30 \uc704\ud55c nonmaxSuppression\uac00 True\ub85c \uc9c0\uc815\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc2dc\uac01\uc801\uc73c\ub85c \uc774\ub7ec\ud55c \ud2b9\uc9d5\uc810\uc744 \uc904\uc774\uae30 \uc704\ud574 \uc784\uacc4\uac12\uc744 \ubcc0\uacbd\ud558\ub294 \uc608\uc81c\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nimport numpy as np\r\nimport cv2\r\nfrom matplotlib import pyplot as plt\r\n\r\nfilename = '.\/data\/butterfly.jpg'\r\nimg = cv2.imread(filename,0)\r\n\r\nfast = cv2.FastFeatureDetector_create()\r\n\r\nfast.setThreshold(150)\r\n#fast.setNonmaxSuppression(False)\r\n\r\nkp = fast.detect(img,None)\r\nimg2=cv2.drawKeypoints(img,kp,None)\r\n\r\nprint(\"Threshold: \", fast.getThreshold())\r\nprint(\"nonmaxSuppression: \", fast.getNonmaxSuppression())\r\nprint(\"neighborhood: \", fast.getType())\r\nprint(\"Total Keypoints with nonmaxSuppression: \", len(kp))\r\n\r\ncv2.imshow('img2', img2)\r\n\r\nkp = fast.detect(img,None)\r\n\r\ncv2.waitKey()\r\ncv2.destroyAllWindows()\r\n<\/pre>\n<p>\uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/2019\/05\/FAST_2.png\" alt=\"\" width=\"496\" height=\"389\" class=\"aligncenter size-full wp-image-6812\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 https:\/\/docs.opencv.org\/3.0-beta\/doc\/py_tutorials\/py_feature2d\/py_fast\/py_fast.html \uc785\ub2c8\ub2e4. \uc774\ubbf8\uc9c0\uc5d0\uc11c \ud2b9\uc9d5\uc810\uc744 \ucd94\ucd9c\ud574 \ub0b4\ub294 \ub2e4\uc591\ud55c \ubc29\ubc95\uc774 \uc788\uc9c0\ub9cc, \uadf8 \uc18d\ub3c4\uba74\uc5d0\uc11c \uc544\uc26c\uc6c0\uc774 \uc788\uc5c8\uace0 \uc815\ud655\ub3c4\ub97c \ud76c\uc0dd\ud558\ub294 \ub300\uc2e0 \ube60\ub978 \uc18d\ub3c4\ub85c \ud2b9\uc9d5\uc810\uc744 \ucd94\ucd9c\ud558\ub294 \ubc29\ubc95\uc73c\ub85c 2006\ub144\uc5d0 FAST\uac00 \ucc98\uc74c \uc81c\uc548\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uc778\uacf5\uc9c0\ub2a5\uc758 \uae30\uacc4\ud559\uc2b5\uc5d0\uc11c\ub3c4 \ud65c\uc6a9\ub41c\ub2e4\uace0 \ud569\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ud2b9\uc815 \ud654\uc18c \uc778\uadfc\uc758 \ud654\uc18c\uac12\uc744 16\uac1c \ubf51\uace0 \ud2b9\uc815 \ud654\uc18c\uc758 \ud654\uc18c\uac12\uc774 \uc778\uadfc\uc758 16\uac1c\uc758 \ud654\uc18c\uac12\uc5d0 \uc784\uacc4\uce58\uac12(t)\uc744 \ub354\ud55c \uac12\ubcf4\ub2e4 \ud06c\uac70\ub098 \uc784\uacc4\uce58\uac12\uc744 \ube80 \uac12\ubcf4\ub2e4 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/www.gisdeveloper.co.kr\/?p=6808\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;Python\uacfc OpenCV \u2013 35 : FAST(Features from Accelerated Segment Test)\uc744 \uc774\uc6a9\ud55c \uc774\ubbf8\uc9c0\uc758 \ud2b9\uc9d5\uc810 \ucd94\ucd9c&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[130,131],"tags":[],"class_list":["post-6808","post","type-post","status-publish","format-standard","hentry","category-opencv","category-python"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/6808","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6808"}],"version-history":[{"count":6,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/6808\/revisions"}],"predecessor-version":[{"id":9434,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/6808\/revisions\/9434"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6808"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}