{"id":44992,"date":"2021-04-22T21:23:16","date_gmt":"2021-04-22T12:23:16","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=44992"},"modified":"2021-04-28T09:13:03","modified_gmt":"2021-04-28T00:13:03","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%9d%b4%eb%af%b8%ec%a7%80-%ed%95%84%ed%84%b0%eb%a7%81-%ea%b3%b5%ea%b0%84%ec%a0%81-%ed%95%84%ed%84%b0","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=44992","title":{"rendered":"[\uc548\ub4dc\ub85c\uc774\ub4dc\ub85c \ubc30\uc6b0\ub294 OpenCV] \uc774\ubbf8\uc9c0 \ud544\ud130\ub9c1 (\uacf5\uac04\uc801 \ud544\ud130\ub9c1)"},"content":{"rendered":"

\uc774\ubbf8\uc9c0 \ud544\ud130\ub9c1<\/h1>\n

\"\"<\/a> \"\"<\/a><\/p>\n

\ud544\ud130(Filter)\ub294 \uc77c\uc0c1\uc0dd\ud65c\uc5d0\uc11c \ub9ce\uc774 \uc4f0\ub294 \ub9d0\uc774\ub2e4. \ud544\ud130\ub780 \ubb34\uc5b8\uac00\ub97c \uac78\ub7ec\uc8fc\ub294 \uc5ed\ud560\uc744 \ud558\ub294 \uac83\uc744 \ub9d0\ud558\ub294\ub370, \uce74\uba54\ub77c\uc758 \ub80c\uc988 \ud544\ud130, \uacf5\uae30\uccad\uc815\uae30\uc758 \ud544\ud130 \uadf8\ub9ac\uace0 \uc140\ub85c\ud310\uc9c0\ub97c \ud1b5\ud574 \ub4e4\uc5b4\uc624\ub294 \ube5b\uc774 \ud2b9\uc815\uc0c9\uc0c1\uc73c\ub85c \uac78\ub7ec\uc9c0\ub294\uac83\ub3c4 \ud544\ud130\ub77c\uace0 \ub9d0\ud560 \uc218 \uc788\ub2e4.<\/p>\n

\uc601\uc0c1\ucc98\ub9ac \ubd84\uc57c\uc5d0\uc11c\uc758 \ud544\ud130\ub9c1\uc740 \uc601\uc0c1\uc5d0\uc11c \ud544\uc694\ud55c \uc815\ubcf4\ub9cc \ud1b5\uacfc\uc2dc\ud0a4\uace0 \uc6d0\ud558\uc9c0 \uc54a\ub294 \uc815\ubcf4\ub294 \uac78\ub7ec\ub0b4\ub294 \uc791\uc5c5\uc774\ub2e4. \ud544\ud130\ub9c1\uc740 \uacf5\uac04\uc801 \ud544\ud130\ub9c1(Spatial domain filter)<\/strong>\uacfc \uc8fc\ud30c\uc218 \uacf5\uac04\uc5d0\uc11c\uc758 \ud544\ud130\ub9c1(Frequency domain filtering)<\/strong>, \ub450\uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \ub098\ub25c\ub2e4.\u00a0\u00a0<\/p>\n

\uc774 \ud3ec\uc2a4\ud305\uc5d0\uc11c\ub294 \uacf5\uac04\uc801 \ud544\ud130\ub9c1\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\ub3c4\ub85d \ud55c\ub2e4.<\/p>\n

Spatial domain filtering<\/h2>\n

\uacf5\uac04\uc801 \ud544\ud130\ub9c1\uc774\ub780 \uc601\uc0c1\uc758 \ud53d\uc140\uac12\uc744 \uc9c1\uc811 \uc774\uc6a9\ud558\ub294 \ud544\ud130\ub9c1 \ubc29\ubc95\uc774\ub2e4. \uc774\ub54c \ud2b9\uc815 \ud53d\uc140\uc758 \uc8fc\ubcc0 \ud53d\uc140\ub4e4\uc744 \ub3d9\uc2dc\uc5d0 \uc0ac\uc6a9\ud558\uba70 \uc8fc\ub85c \ub9c8\uc2a4\ud06c(mask) \uc5f0\uc0b0<\/strong>\uc744 \uc774\uc6a9\ud55c\ub2e4. \ub9c8\uc2a4\ud06c \ub300\uc2e0 \ucee4\ub110, \uc708\ub3c4\uc6b0, \ud15c\ud50c\ub9bf\uc774\ub77c\ub294 \uc6a9\uc5b4\ub97c \uc4f0\uae30\ub3c4 \ud558\ub294\ub370 \uc8fc\ub85c \ub9c8\uc2a4\ud06c \ub610\ub294 \ucee4\ub110\uc774\ub780 \uc6a9\uc5b4\ub97c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n

\"\"<\/a><\/p>\n

\ub9c8\uc2a4\ud06c\ub294 \ubcf4\ud1b5 3*3 \ud589\ub82c\uc758 \ud615\ud0dc\ub97c \ub9ce\uc774 \uc0ac\uc6a9\ud558\uc9c0\ub9cc \uc0c1\ud669\uc5d0 \ub530\ub77c 5*5\ub77c\ub358\uc9c0 \uc77c\uc9c1\uc120 \ub610\ub294 \uc2ed\uc790\uac00 \ud615\ud0dc\uc758 \ub9c8\uc2a4\ud06c\ub3c4 \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n

\ub9c8\uc2a4\ud06c\uc758 \ud615\ud0dc\uc640 \uac12\uc5d0 \ub530\ub77c \ud544\ud130\uc758 \uc5ed\ud560\uc774 \uacb0\uc815\ub41c\ub2e4. \uc774\ubbf8\uc9c0\ub97c \ubd80\ub4dc\ub7fd\uac8c \ub9cc\ub4e4\uac70\ub098, \uc120\uba85\ud558\uac8c \ub9cc\ub4e4 \ub54c \uadf8\ub9ac\uace0 \ub178\uc774\uc988\ub97c \uc81c\uac70\ud558\ub294 \ub4f1\uc758 \uae30\ub2a5\uc744 \uad6c\ud604\ud560 \uc218 \uc788\ub2e4.<\/p>\n

\uc77c\ubc18\uc801\uc73c\ub85c 3*3 \ub9c8\uc2a4\ud06c\ub97c \uc774\uc6a9\ud558\uc5ec \uacf5\uac04\uc801 \ud544\ud130\ub9c1\uc744 \uacc4\uc0b0\ud558\ub294 \uacfc\uc815\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n

\"\"<\/a><\/p>\n

\ud0c0\uac9f \ud53d\uc140\uacfc \uadf8 \uc8fc\ubcc0 \ud53d\uc140\ub4e4\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub9c8\uc2a4\ud06c\uc640 \ud568\uaed8 \uc5f0\uc0b0\ud558\uc5ec \ucd9c\ub825 \ud53d\uc140(\uc601\uc0c1)\uc744 \uacb0\uc815\ud55c\ub2e4. \uc544\ub798\uc758 \uc6c0\uc9e4\uc740 \ud30c\ub791\uc0c9\uc774 \uc785\ub825\uc601\uc0c1 \ub179\uc0c9\uc774 \ucd9c\ub825\uc601\uc0c1\uc774\ub2e4. \ub9c8\uc2a4\ud06c\uc640 \ud568\uaed8 \uc8fc\ubcc0\ubd80 \ud53d\uc140 \uc5f0\uc0b0\uc744 \ud1b5\ud574 \ucd9c\ub825\uc601\uc0c1\uc744 \ub9cc\ub4e4\uc5b4\uac00\ub294 \uacfc\uc815\uc744 \uac00\uc2dc\ud654\ud558\uace0 \uc788\ub2e4.<\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

\ud544\ud130\ub9c1 \uc5f0\uc0b0\ubc29\uc2dd\uc740 \ub300\ucda9 \uac10\uc774 \uc624\ub9ac\ub77c \uc0dd\uac01\uc774 \ub4e0\ub2e4. \uc774\ub7ec\ud55c \uc5f0\uc0b0\uc744 Convolution<\/strong>\uc774\ub77c\uace0 \ud558\uace0, Correlation<\/strong>\uc774\ub77c\uace0\ub3c4 \ud55c\ub2e4.<\/p>\n

OpenCV\uc5d0\uc11c \ud544\ud130\ub97c \uc801\uc6a9\ud558\uae30 \uc704\ud574 \uc0ac\uc6a9\ud558\ub294 \ud568\uc218\ub85c filter2D\uac00 \uc788\ub2e4.<\/p>\n

filter2D(Mat src, Mat dst, int ddepth, Mat kernel)<\/pre>\n
src : \uc785\ub825 \uc601\uc0c1\r\ndst : \ucd9c\ub825 \uc601\uc0c1\r\nddepth : \ucd9c\ub825 \uc601\uc0c1 \ub370\uc774\ud130 \ud0c0\uc785. -1\uc744 \uc9c0\uc815\ud558\uba74 src\uc640 \uac19\uc740 \ud0c0\uc785\uc758 dst\uc601\uc0c1\uc744 \uc0dd\uc131\r\nkernel : \ub9c8\uc2a4\ud06c \ud589\ub82c<\/pre>\n
\ucd94\uac00\uc801\uc73c\ub85c borderType\uc744 \uc9c0\uc815\ud560 \uc218 \uc788\ub2e4.<\/p>\n
\ub300\ubd80\ubd84\uc758 OpenCV\ud568\uc218\ub294 \uc785\ub825 \uc601\uc0c1 \uc678\uacfd\uc5d0\uc11c \ucc38\uc870\ud560 \ud53d\uc140\uc774 \uc5c6\ub294 \uacbd\uc6b0 \uac00\uc0c1\uc758 \ud53d\uc140\uc744 \uc0dd\uc131\ud558\ub294\ub370, \uadf8 \ud53d\uc140\uc744 \uc5b4\ub5bb\uac8c \ub9cc\ub4e4\uc9c0 borderType\uc5d0 \uc9c0\uc815\ud558\uba74\ub41c\ub2e4.\u00a0\u00a0<\/p>\n
BORDER_DEFAULT : BORDER_REFLECT_101\uacfc \uac19\uc74c. \uae30\ubcf8\uac12\r\nBORDER_CONSTANT : \uc785\ub825\ud55c(\uace0\uc815) \uac12\uc73c\ub85c \ud53d\uc140\uc744 \ud655\uc7a5\ud55c\ub2e4.\r\nBORDER_WRAP : \ubc18\ub300\ucabd\ubd80\ud130 \ubcf5\uc81c\ud574\uc11c \ud53d\uc140\uc744 \ud655\uc7a5\ud55c\ub2e4.\r\nBORDER_REPLICATE : \uc5e3\uc9c0 \ud53d\uc140\uc744 \ubcf5\uc0ac\ud574\uc11c \ud655\uc7a5\ud55c\ub2e4.\r\nBORDER_REFLECT : \ubc18\uc0ac\ub85c \ud53d\uc140\uc744 \ud655\uc7a5\ud55c\ub2e4.\r\nBORDER_REFLECT_101 : \ubc18\uc0ac\ub85c \ud53d\uc140\uc744 \ud655\uc7a5\ud55c\ub2e4. \uc5e3\uc9c0 \ud53d\uc140\uc744 '\uc774\uc911\uc73c\ub85c' \ub9cc\ub4e4\uc9c0 \uc54a\ub294\ub2e4.<\/pre>\n
\ud544\ud130 \uc801\uc6a9 \uc608\uc81c\u00a0<\/h2>\n
\ub2e4\uc74c \uc548\ub4dc\ub85c\uc774\ub4dc \uc608\uc81c\ub294 \uc8fc\uc5b4\uc9c4 \uc774\ubbf8\uc9c0\uc5d0 filter2D\ud568\uc218\uc640 \ud2b9\uc815 \ub9c8\uc2a4\ud06c\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube14\ub7ec\ud6a8\uacfc\ub97c \uc801\uc6a9\ud55c\ub2e4.<\/p>\n
private val kernelSize = 5\r\noverride fun process(src: Mat): Mat {\r\n    val dst = Mat()\r\n    val kernel = Mat(kernelSize, kernelSize, CvType.CV_32F)\r\n    for(i in 0 until kernelSize){\r\n        for(j in 0 until kernelSize){\r\n            kernel.put(i, j, 1.0 \/ (kernelSize*kernelSize).toDouble())\r\n        }\r\n    }\r\n    Imgproc.filter2D(src, dst, -1, kernel)\r\n    return dst\r\n}<\/pre>\n
\ub9c8\uc2a4\ud06c\uc758 \ud615\ud0dc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4<\/p>\n
\/\/ \ub9c8\uc2a4\ud06c\r\n1\/25, 1\/25, 1\/25, 1\/25, 1\/25,\r\n1\/25, 1\/25, 1\/25, 1\/25, 1\/25,\r\n1\/25, 1\/25, 1\/25, 1\/25, 1\/25,\r\n1\/25, 1\/25, 1\/25, 1\/25, 1\/25,\r\n1\/25, 1\/25, 1\/25, 1\/25, 1\/25<\/pre>\n
\uc2e4\ud589 \uacb0\uacfc.<\/p>\n
\"\"<\/a><\/p>\n
\uc6d0\ubcf8<\/p>\n<\/div>\n
\"\"<\/a><\/p>\n
\ud544\ud130 1\ud68c \uc801\uc6a9<\/p>\n<\/div>\n
\"\"<\/a><\/p>\n
\ud544\ud130 2\ud68c \uc801\uc6a9<\/p>\n<\/div>\n
\"\"<\/a><\/p>\n
\ud544\ud130 3\ud68c \uc801\uc6a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\uc774\ubbf8\uc9c0 \ud544\ud130\ub9c1 \ud544\ud130(Filter)\ub294 \uc77c\uc0c1\uc0dd\ud65c\uc5d0\uc11c \ub9ce\uc774 \uc4f0\ub294 \ub9d0\uc774\ub2e4. \ud544\ud130\ub780 \ubb34\uc5b8\uac00\ub97c \uac78\ub7ec\uc8fc\ub294 \uc5ed\ud560\uc744 \ud558\ub294 \uac83\uc744 \ub9d0\ud558\ub294\ub370, \uce74\uba54\ub77c\uc758 \ub80c\uc988 \ud544\ud130, \uacf5\uae30\uccad\uc815\uae30\uc758 \ud544\ud130 \uadf8\ub9ac\uace0 \uc140\ub85c\ud310\uc9c0\ub97c \ud1b5\ud574 \ub4e4\uc5b4\uc624\ub294 \ube5b\uc774 \ud2b9\uc815\uc0c9\uc0c1\uc73c\ub85c \uac78\ub7ec\uc9c0\ub294\uac83\ub3c4 \ud544\ud130\ub77c\uace0 \ub9d0\ud560 \uc218 \uc788\ub2e4. \uc601\uc0c1\ucc98\ub9ac \ubd84\uc57c\uc5d0\uc11c\uc758 \ud544\ud130\ub9c1\uc740 \uc601\uc0c1\uc5d0\uc11c \ud544\uc694\ud55c \uc815\ubcf4\ub9cc \ud1b5\uacfc\uc2dc\ud0a4\uace0 \uc6d0\ud558\uc9c0 \uc54a\ub294 \uc815\ubcf4\ub294 \uac78\ub7ec\ub0b4\ub294 \uc791\uc5c5\uc774\ub2e4. \ud544\ud130\ub9c1\uc740 \uacf5\uac04\uc801 \ud544\ud130\ub9c1(Spatial domain filter)\uacfc \uc8fc\ud30c\uc218 \uacf5\uac04\uc5d0\uc11c\uc758 \ud544\ud130\ub9c1(Frequency […]<\/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\/44992"}],"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=44992"}],"version-history":[{"count":2,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/44992\/revisions"}],"predecessor-version":[{"id":45049,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/44992\/revisions\/45049"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=44992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=44992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=44992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}