{"id":6663,"date":"2019-04-08T19:55:40","date_gmt":"2019-04-08T10:55:40","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=6663"},"modified":"2020-05-28T12:26:36","modified_gmt":"2020-05-28T03:26:36","slug":"python%ea%b3%bc-opencv-21-%ed%9e%88%ec%8a%a4%ed%86%a0%ea%b7%b8%eb%9e%a8histogram-3-4","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=6663","title":{"rendered":"Python\uacfc OpenCV \u2013 22 : \ud788\uc2a4\ud1a0\uadf8\ub7a8(Histogram) 3\/4"},"content":{"rendered":"

\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 https:\/\/opencv-python-tutroals.readthedocs.io\/en\/latest\/py_tutorials\/py_imgproc\/py_histograms\/py_2d_histogram\/py_2d_histogram.html#twod-histogram \uc785\ub2c8\ub2e4.<\/p>\n

\uc9c0\uae08\uae4c\uc9c0\ub294 \ud558\ub098\uc758 \uac12\uc744 \uac00\uc9c4 \ud654\uc18c, \uc989 Grayscale \uc774\ubbf8\uc9c0\uc5d0 \ub300\ud55c \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc744 \uc0b4\ud3b4\ubd24\uc2b5\ub2c8\ub2e4. \uc774\ub97c 1\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubd05\ub2c8\ub2e4. 2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc740 2\uac1c\uc758 \uac12\uc744 \uac00\uc9c0\ub294 \ud654\uc18c\uc5d0 \ub300\ud55c \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc73c\ub85c, HSV \uc911 H\uc640 S\uc758 \uac12\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. H\ub294 Hue, S\ub294 Saturation\uc785\ub2c8\ub2e4.<\/p>\n

2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc744 \uc5bb\ub294 \ubc29\ubc95\uc740 OpenCV\uc640 numpy \ubc29\uc2dd\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uba3c\uc800 OpenCV \ubc29\uc2dd\uc5d0 \ub300\ud55c \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

\r\nimport cv2\r\nimport numpy as np\r\n\r\nimg = cv2.imread('.\/data\/home.jpg')\r\nhsv = cv2.cvtColor(img,cv2.COLOR_BGR2HSV)\r\n\r\nhist = cv2.calcHist([hsv], [0, 1], None, [180, 256], [0, 180, 0, 256])\r\n<\/pre>\n
\uc774\ubbf8\uc9c0\ub97c \uc77d\uace0 BGR \ucc44\ub110\uc744 HSV\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4. H\uc5d0 \ub300\ud55c \uac12\uc758 \ubc94\uc704\ub294 0-180\uc774\uace0 S\uc5d0 \ub300\ud55c \uac12\uc758 \ubc94\uc704\ub294 0-256\ub77c\ub294 \uc810\uc744 \ud1b5\ud574 cv2.calcHist\uc758 \uc778\uc790\uac12\uc758 \uc758\ubbf8\ub97c \uc774\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc81c Numpy \ubc29\uc2dd\uc5d0 \ub300\ud55c \ucf54\ub4dc\ub97c \uc0b4\ud3b4\ubcf4\uba74..<\/p>\n
\r\nimport cv2\r\nimport numpy as np\r\nfrom matplotlib import pyplot as plt\r\n\r\nimg = cv2.imread('.\/data\/home.jpg')\r\nhsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)\r\nh, s, v = cv2.split(hsv)\r\n\r\nhist, xbins, ybins = np.histogram2d(h.ravel(),s.ravel(),[180,256],[[0,180],[0,256]])\r\n<\/pre>\n
2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc744 \uadf8\ub798\ud504\ub85c \ud45c\uc2dc\ud558\ub294 \ubc29\ubc95\uc73c\ub85c Matplotlib\uc744 \uc0ac\uc6a9\ud574 \uc608\uc81c\ub97c \uc0b4\ud3b4\ubcf4\uba74…<\/p>\n
\r\nimport cv2\r\nimport numpy as np\r\nfrom matplotlib import pyplot as plt\r\n\r\nimg = cv2.imread('.\/data\/home.jpg')\r\nhsv = cv2.cvtColor(img,cv2.COLOR_BGR2HSV)\r\nhist = cv2.calcHist( [hsv], [0, 1], None, [180, 256], [0, 180, 0, 256] )\r\n\r\nplt.imshow(hist,interpolation = 'nearest')\r\nplt.show()\r\n<\/pre>\n
\uc2e4\ud589 \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
\"\"<\/p>\n
X\ucd95\uc740 S\uc774\uace0 Y\ucd95\uc740 H\uc785\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
\uc774 \uae00\uc758 \uc6d0\ubb38\uc740 https:\/\/opencv-python-tutroals.readthedocs.io\/en\/latest\/py_tutorials\/py_imgproc\/py_histograms\/py_2d_histogram\/py_2d_histogram.html#twod-histogram \uc785\ub2c8\ub2e4. \uc9c0\uae08\uae4c\uc9c0\ub294 \ud558\ub098\uc758 \uac12\uc744 \uac00\uc9c4 \ud654\uc18c, \uc989 Grayscale \uc774\ubbf8\uc9c0\uc5d0 \ub300\ud55c \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc744 \uc0b4\ud3b4\ubd24\uc2b5\ub2c8\ub2e4. \uc774\ub97c 1\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubd05\ub2c8\ub2e4. 2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc740 2\uac1c\uc758 \uac12\uc744 \uac00\uc9c0\ub294 \ud654\uc18c\uc5d0 \ub300\ud55c \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc73c\ub85c, HSV \uc911 H\uc640 S\uc758 \uac12\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. H\ub294 Hue, S\ub294 Saturation\uc785\ub2c8\ub2e4. 2\ucc28\uc6d0 \ud788\uc2a4\ud1a0\uadf8\ub7a8\uc744 \uc5bb\ub294 \ubc29\ubc95\uc740 OpenCV\uc640 numpy \ubc29\uc2dd\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uba3c\uc800 OpenCV \ubc29\uc2dd\uc5d0 … <\/p>\n
\ub354 \ubcf4\uae30 “Python\uacfc OpenCV \u2013 22 : \ud788\uc2a4\ud1a0\uadf8\ub7a8(Histogram) 3\/4”<\/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-6663","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\/6663","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=6663"}],"version-history":[{"count":5,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/6663\/revisions"}],"predecessor-version":[{"id":9459,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/6663\/revisions\/9459"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6663"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}