{"id":45322,"date":"2021-08-12T13:14:43","date_gmt":"2021-08-12T04:14:43","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=45322"},"modified":"2021-08-12T13:14:43","modified_gmt":"2021-08-12T04:14:43","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%a0%81%ec%9d%91%ed%98%95-%ec%9d%b4%ec%a7%84%ed%99%94adaptive-threshold","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=45322","title":{"rendered":"[\uc548\ub4dc\ub85c\uc774\ub4dc\ub85c \ubc30\uc6b0\ub294 OpenCV] \uc801\uc751\ud615 \uc774\uc9c4\ud654(Adaptive Threshold)"},"content":{"rendered":"

\uc801\uc751\ud615 \uc774\uc9c4\ud654<\/h1>\n

\uc9c0\ub09c \ud3ec\uc2a4\ud305\uc5d0\uc11c Otsu<\/a> \ubc0f \uc9c0\uc5ed \uc774\uc9c4\ud654<\/a>\ub97c \uc801\uc6a9 \ud588\uc744 \ub54c \ub2e4\uc74c\uacfc \uac19\uc740 \uacb0\uacfc\ubb3c\uc744 \uc5bb\ub294 \uac83\uc744 \ud655\uc778\ud588\ub2e4.<\/p>\n

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

Otsu\ub098 \uc9c0\uc5ed \uc774\uc9c4\ud654\ub97c \ud1b5\ud55c \ubc29\ubc95\uc740 \ubaa8\ub4e0 \uc774\ubbf8\uc9c0\uc5d0\uc11c, \ud2b9\ud788 \uc774\ubbf8\uc9c0\uac00 \uc11c\ub85c \ub2e4\ub978\uc601\uc5ed\uc5d0\uc11c \ub2e4\ub978 \ubc1d\uae30\uac12\uc744 \uac00\uc9c8 \ub54c \uc798 \uc218\ud589\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc774\ub7ec\ud55c \uacbd\uc6b0 \uc801\uc751\ud615 \uc774\uc9c4\ud654<\/strong>\ub97c \uc9c4\ud589\ud560 \uc218 \uc788\ub2e4.<\/p>\n

\uc801\uc751\ud615 \uc774\uc9c4\ud654\ub780 \uc774\ubbf8\uc9c0\uc758 \uac01 \ud53d\uc140\uc5d0 \ub300\ud574 \uac1c\ubcc4\uc801\uc73c\ub85c \uc784\uacc4\uac12\uc744 \uc124\uc815\ud558\ub294 \ubc29\ubc95\uc73c\ub85c, \ub300\uc0c1 \ud53d\uc140\uc758 \uc8fc\ubcc0 \ud53d\uc140\ub4e4\uc744 \uae30\ubc18\uc73c\ub85c \uacb0\uc815\ub41c\ub2e4. \ub530\ub77c\uc11c \uc774\ubbf8\uc9c0\uc758 \ub2e4\ub978 \uc601\uc5ed\uc5d0 \ub300\ud574 \uc11c\ub85c \ub2e4\ub978 \uc784\uacc4\uac12\uc744 \uc801\uc6a9\ud558\ubbc0\ub85c \ubc30\uacbd\uc758 \ubc1d\uae30\uac00 \ub2e4\uc591\ud55c \uc774\ubbf8\uc9c0\uc5d0\uc11c \uc798 \ub3d9\uc791\ud558\uac8c \ub41c\ub2e4.<\/p>\n

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

\uc704\uc640 \uac19\uc740 \uc774\ubbf8\uc9c0\uac00 \uc788\ub2e4\uace0 \uac00\uc815\ud558\uc790. \ube14\ub85d \ud558\ub098\ub294 \ud558\ub098\uc758 \ud53d\uc140\uc744 \uc758\ubbf8 \ud55c\ub2e4.<\/p>\n

\ud53d\uc140 P13\uc5d0 \ub300\ud55c \uc784\uacc4\uac12\uc744 \uc784\uc758\ub85c \uc124\uc815\ud574\ubcf4\uc790.<\/p>\n

    \n
  1. \uc6b0\uc120 \uc8fc\ubcc0 \uc778\uc811 \ud53d\uc140\uc601\uc5ed\uc744 \uc124\uc815\ud574\uc57c\ud55c\ub2e4. \uc774\ub97c \ube14\ub85d\ud06c\uae30(blockSize)\ub77c\uace0 \ud558\uc790.<\/li>\n
  2. \ud53d\uc140 P13\uc5d0 \ub300\ud574 \ube14\ub85d\ud06c\uae30\ub97c 5\ub85c \uc124\uc815\ud558\uba74 \uc704 \uadf8\ub9bc\ucc98\ub7fc P13\uc744 \uc911\uc2ec\uc73c\ub85c \ud558\ub294 5*5 \ube14\ub85d\uc774 \uc124\uc815\ub41c\ub2e4.(\ud30c\ub780\uc0c9 \ube14\ub85d \uc601\uc5ed)\u00a0<\/li>\n
  3. P1~P25 \uc601\uc5ed\uc5d0 \ub300\ud55c \ud3c9\uade0\uac12 \ub610\ub294 \uac00\uc6b0\uc2dc\uc548 \ud544\ud130\ub97c \ud1b5\ud55c \uac00\uc911\uce58 \ud3c9\uade0\uac12\uc744 \uad6c\ud558\ub3c4\ub85d \ud55c\ub2e4.<\/li>\n
  4. \ud3c9\uade0\uac12\uc5d0\uc11c \uc784\uc758\uc758 \uc0c1\uc218 C\ub97c \ube80 \uac12\uc774 \uc784\uacc4\uac12\uc73c\ub85c \uc124\uc815\ub41c\ub2e4.<\/li>\n
  5. \uc124\uc815\ub41c \uc784\uacc4\uac12\uc73c\ub85c P13\uc5d0 \uc774\uc9c4\ud654\ub97c \uc801\uc6a9\ud55c\ub2e4.
    \n\uc608) P13 = if(P13 > T) 255 else 0<\/li>\n<\/ol>\n

    \ubaa8\ub4e0 \ud53d\uc140\uc5d0 \ub300\ud574 \uc704 1~5 \uacfc\uc815\uc744 \ubc18\ubcf5\ud558\ub294 \uac83\uc774 \uc801\uc751\ud615 \uc774\uc9c4\ud654\uc758 \uacb0\uacfc\ubb3c\uc774 \ub41c\ub2e4.<\/p>\n

    OpenCV\uc5d0\uc11c\ub294 \uc774 \uacfc\uc815\uc744 adaptiveThreshold<\/strong>\ub77c\ub294 \ud568\uc218\ub85c \uc81c\uacf5\ud55c\ub2e4.<\/p>\n

    Imgproc.adaptiveThreshold(\r\n    Mat src, Mat dst, \r\n    double maxValue, \r\n    int adaptiveMethod, \r\n    int thresholdType, \r\n    int blockSize, \r\n    double C\r\n)<\/pre>\n
    src : \uc785\ub825 \uc601\uc0c1\r\ndst : \ucd9c\ub825 \uc601\uc0c1\r\nmaxValue : \uc784\uacc4\uac12\uc758 \ucd5c\ub300\uce58(\ubcf4\ud1b5 255\ub85c \uc124\uc815)\r\nadaptiveMethod : \ube14\ub85d \ud3c9\uade0 \uacc4\uc0b0 \ubc29\ubc95 \uc9c0\uc815.\r\n    ADAPTIVE_THRESH_MEAN_C\ub294 \uc0b0\uc220 \ud3c9\uade0, \r\n    ADAPTIVE_THRESH_GAUSSIAN_C\ub294 \uac00\uc6b0\uc2dc\uc548 \uac00\uc911\uce58 \ud3c9\uade0\uc744 \uc801\uc6a9\r\n\r\nthresholdType : THRESH_BINARY or THRESH_BINARY_INV\r\nblockSize : \ube14\ub85d\ud06c\uae30, \ucd5c\uc18c 3\uc774\uc0c1\uc758 \ud640\uc218\r\nC : \ube14\ub85d \ub0b4 \ud3c9\uade0\uac12\uc5d0\uc11c \ube84 \uac12, (0, \uc74c\uc218, \uc591\uc218 \ubaa8\ub450 \uc9c0\uc815 \uac00\ub2a5)<\/pre>\n
    \uc774\uc81c adaptiveThreshold\ub97c \uc801\uc6a9\ud558\uc5ec \uc2a4\ub3c4\ucfe0 \uc774\ubbf8\uc9c0\uc5d0 \uc774\uc9c4\ud654\ub97c \uc801\uc6a9\ud574\ubcf4\uc790.<\/p>\n
    adaptiveMethod\ub294 ADAPTIVE_THRESH_GAUSSIAN_C, 
    \nC\uac12\uc740 0\uc73c\ub85c \uc124\uc815\ud558\uace0 \ube14\ub85d \ud06c\uae30\ub9cc \ubc14\uafd4\uac00\uba70 \uc774\uc9c4\ud654\ub97c \uc9c4\ud589\ud55c \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
     <\/p>\n

    \n    https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2021\/08\/www.charlezz.com-opencv-adaptive-threshold-screencapture-1628408960021.mp4<\/a><\/video><\/div>\n
    TL;DR<\/h2>\n
    OpenCV\uc758 adaptiveThreshold \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc801\uc751\ud615 \uc774\uc9c4\ud654\ub97c \uc218\ud589\ud558\uace0, \uc6d0\ud558\ub294 \uacb0\uacfc\ubb3c\uc744 \uc5bb\uc5c8\ub2e4.<\/p>\n
    \uc801\uc751\ud615 \uc774\uc9c4\ud654\ub294 \ubaa8\ub4e0 \ud53d\uc140\uc5d0 \ub300\ud574 \uc784\uacc4\uac12\uc744 \uacc4\uc0b0\ud55c\ub2e4. \uadf8\ub9ac\uace0 \ube14\ub85d\ud06c\uae30\uac00 \ucee4\uc9c0\uba74 \uc5f0\uc0b0\ub7c9\uc774 \ub298\uc5b4\ub098\uae30 \ub54c\ubb38\uc5d0 Otsu\ub098 \uc9c0\uc5ed \uc774\uc9c4\ud654\ubcf4\ub2e4 \uc0c1\ub300\uc801\uc73c\ub85c \uc5f0\uc0b0\uc18d\ub3c4\uac00 \ub290\ub9ac\ub2e4. \uadf8\ub7ec\ubbc0\ub85c \uc0c1\ud669\uc5d0 \ub9de\uac8c \uc801\uc808\ud55c \uc774\uc9c4\ud654 \uc54c\uace0\ub9ac\uc998\uc744 \uc120\ud0dd\ud574\uc57c \ud55c\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
    \uc801\uc751\ud615 \uc774\uc9c4\ud654 \uc9c0\ub09c \ud3ec\uc2a4\ud305\uc5d0\uc11c Otsu \ubc0f \uc9c0\uc5ed \uc774\uc9c4\ud654\ub97c \uc801\uc6a9 \ud588\uc744 \ub54c \ub2e4\uc74c\uacfc \uac19\uc740 \uacb0\uacfc\ubb3c\uc744 \uc5bb\ub294 \uac83\uc744 \ud655\uc778\ud588\ub2e4. Otsu\ub098 \uc9c0\uc5ed \uc774\uc9c4\ud654\ub97c \ud1b5\ud55c \ubc29\ubc95\uc740 \ubaa8\ub4e0 \uc774\ubbf8\uc9c0\uc5d0\uc11c, \ud2b9\ud788 \uc774\ubbf8\uc9c0\uac00 \uc11c\ub85c \ub2e4\ub978\uc601\uc5ed\uc5d0\uc11c \ub2e4\ub978 \ubc1d\uae30\uac12\uc744 \uac00\uc9c8 \ub54c \uc798 \uc218\ud589\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc774\ub7ec\ud55c \uacbd\uc6b0 \uc801\uc751\ud615 \uc774\uc9c4\ud654\ub97c \uc9c4\ud589\ud560 \uc218 \uc788\ub2e4. \uc801\uc751\ud615 \uc774\uc9c4\ud654\ub780 \uc774\ubbf8\uc9c0\uc758 \uac01 \ud53d\uc140\uc5d0 \ub300\ud574 \uac1c\ubcc4\uc801\uc73c\ub85c \uc784\uacc4\uac12\uc744 […]<\/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\/45322"}],"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=45322"}],"version-history":[{"count":4,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45322\/revisions"}],"predecessor-version":[{"id":45345,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45322\/revisions\/45345"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=45322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=45322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}