{"id":1836,"date":"2018-09-18T01:35:38","date_gmt":"2018-09-17T16:35:38","guid":{"rendered":"https:\/\/www.dogrow.net\/python\/?p=1836"},"modified":"2018-09-18T03:59:22","modified_gmt":"2018-09-17T18:59:22","slug":"blog100","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/python\/blog100\/","title":{"rendered":"(100) OpenCV #5 : \u753b\u50cf\u30ab\u30e9\u30fc\u306e\u30d0\u30f3\u30c9\u5165\u308c\u66ff\u3048\uff08BGR \u2192 RGB\uff09"},"content":{"rendered":"<h1 class=\"my_h\">1. \u3084\u308a\u305f\u3044\u3053\u3068<\/h1>\n<p>\u30ab\u30e9\u30fc\u753b\u50cf\u3092 OpenCV\u3067\u30ed\u30fc\u30c9\u3057\u305f\u5834\u5408\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u914d\u5217\u4e2d\u306e\u4e26\u3073\u9806\u306f <span class=\"my_fs_big2\" style=\"color:#00f\">B<\/span><span class=\"my_fs_big2\" style=\"color:#080\">G<\/span><span class=\"my_fs_big2\" style=\"color:#f00\">R<\/span> \u3067\u3042\u308b\u3002<br \/>\n\u3053\u308c\u3092 <span class=\"my_fs_big2\" style=\"color:#f00\">R<\/span><span class=\"my_fs_big2\" style=\"color:#080\">G<\/span><span class=\"my_fs_big2\" style=\"color:#00f\">B<\/span> \u306e\u4e26\u3073\u9806\u306b\u5909\u66f4\u3057\u305f\u3044\u3002<\/p>\n<h1 class=\"my_h\">2. \u672c\u5f53\u306b BGR\u306a\u306e\u304b\u3092\u78ba\u8a8d<\/h1>\n<p>\u3053\u3093\u306a\u753b\u50cf\u3092\u7528\u610f\u3057\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/python\/wp-content\/uploads\/2018\/09\/band.png\" alt=\"\" \/><\/p>\n<p>\u3053\u306e\u753b\u50cf\u3092 OpenCV\u3067\u30ed\u30fc\u30c9\u3057\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u306e\u4e2d\u8eab\u3092\u30d0\u30f3\u30c9\u5225\uff08\uff1d\u30c1\u30e3\u30cd\u30eb\u5225\uff09\u306b\u898b\u3066\u307f\u308b\u3002<\/p>\n<p>\u56e0\u307f\u306b&#8230;<br \/>\nOpenCV\u3067\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u30c7\u30fc\u30bf\u306f numpy\u914d\u5217\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nimport cv2\r\nimg = cv2.imread(&quot;band.png&quot;)\r\ntype(img)\r\n<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b numpy.ndarray \u3068\u8868\u793a\u3055\u308c\u305f\u3002<\/p>\n<pre>\r\n&lt;class 'numpy.ndarray'&gt;\r\n<\/pre>\n<p>\u3088\u3063\u3066\u3001\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u30c7\u30fc\u30bf\u304b\u3089\u4efb\u610f\u306e\u30d0\u30f3\u30c9\u306e\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3059\u308b\u306b\u306f\u3001numpy\u914d\u5217\u306b\u5bfe\u3059\u308b\u5236\u5fa1\u3092\u3059\u308c\u3070\u3088\u3044\u306e\u3060\u3002<\/p>\n<p>\u307e\u305a\u306f 1\u30d0\u30f3\u30c9\u76ee\u306f\uff1f<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nimport cv2\r\nimport numpy as np\r\nimg = cv2.imread(&quot;band.png&quot;)\r\ncv2.namedWindow('image', cv2.WINDOW_AUTOSIZE)\r\n\r\n# 1\u30d0\u30f3\u30c9\u76ee\u3060\u3051\u3092\u53d6\u5f97\uff06\u8868\u793a\r\nimg1 = img&#x5B;:,:,0]\r\ncv2.imshow('image', img1)\r\ncv2.waitKey()\r\ncv2.destroyAllWindows()\r\n<\/pre>\n<p>\u78ba\u304b\u306b B(Blue)\u304c\u5165\u3063\u3066\u3044\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/python\/wp-content\/uploads\/2018\/09\/band1.png\" alt=\"\" \/><\/p>\n<p>\u6b21\u306b 2\u30d0\u30f3\u30c9\u76ee\u306f\uff1f<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n# 2\u30d0\u30f3\u30c9\u76ee\u3060\u3051\u3092\u53d6\u5f97\uff06\u8868\u793a\r\nimg2 = img&#x5B;:,:,1]\r\ncv2.imshow('image', img2)\r\ncv2.waitKey()\r\ncv2.destroyAllWindows()\r\n<\/pre>\n<p>\u78ba\u304b\u306b G(Green)\u304c\u5165\u3063\u3066\u3044\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/python\/wp-content\/uploads\/2018\/09\/band2.png\" alt=\"\" \/><\/p>\n<p>\u6700\u5f8c\u306b 3\u30d0\u30f3\u30c9\u76ee\u306f\uff1f<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n# 3\u30d0\u30f3\u30c9\u76ee\u3060\u3051\u3092\u53d6\u5f97\uff06\u8868\u793a\r\nimg3 = img&#x5B;:,:,2]\r\ncv2.imshow('image', img3)\r\ncv2.waitKey()\r\ncv2.destroyAllWindows()\r\n<\/pre>\n<p>\u78ba\u304b\u306b R(Red)\u304c\u5165\u3063\u3066\u3044\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/python\/wp-content\/uploads\/2018\/09\/band3.png\" alt=\"\" \/><\/p>\n<p>cv2.imread()\u3067\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u30c7\u30fc\u30bf\u306e\u4e2d\u8eab\u306f\u3001\u78ba\u304b\u306b <span class=\"my_fs_big2\" style=\"color:#00f\">B<\/span><span class=\"my_fs_big2\" style=\"color:#080\">G<\/span><span class=\"my_fs_big2\" style=\"color:#f00\">R<\/span> \u306e\u9806\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u305f\u3002<\/p>\n<h1 class=\"my_h\">3. \u3084\u3063\u3066\u307f\u308b<\/h1>\n<h3 class=\"my_h\">(1) OpenCV\u306e\u95a2\u6570\u3067 BGR \u2192 RGB\u5909\u63db<\/h3>\n<p>\u4fbf\u5229\u306a\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nimport cv2\r\nimg = cv2.imread(&quot;band.png&quot;)\r\n\r\n# OpenCV\u306e\u95a2\u6570 cvtColor()\u3067\u30d0\u30f3\u30c9\u5909\u63db\u3059\u308b\u3002\r\nimgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)\r\n<\/pre>\n<h3 class=\"my_h\">(2) numpy\u914d\u5217\u306e\u30b9\u30ef\u30c3\u30d7\u3067\u5b9f\u73fe<\/h3>\n<p>\u524d\u8ff0\u306e\u300c2. \u672c\u5f53\u306b BGR\u306a\u306e\u304b\u3092\u78ba\u8a8d\u300d\u3067\u78ba\u8a8d\u3057\u305f\u901a\u308a\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u914d\u5217\u306e3\u6b21\u5143\u76ee\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n[][][0] : B (Blue)<br \/>\n[][][1] : G (Green)<br \/>\n[][][2] : R (Red)<\/p>\n<p>\u3088\u3063\u3066&#8230;<br \/>\n[][][0]\u3068 [][][2]\u3092\u5165\u308c\u66ff\u3048\u3066\u3084\u308c\u3070\u3088\u3044\u306e\u3060\u3002<\/p>\n<p>\u3053\u308c\u306f numpy\u914d\u5217\u306b\u5bfe\u3059\u308b\u5236\u5fa1\u3067\u7c21\u5358\u306b\u66f8\u3051\u308b\u3002<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nimport cv2\r\nimport numpy as np\r\nimg = cv2.imread(&quot;band.png&quot;)\r\n\r\n# \u753b\u50cf\u30c7\u30fc\u30bf\u306e 3\u6b21\u5143\u76ee\u3092 2\u21921\u21920 \u306e\u9806\u306b\u5165\u308c\u66ff\u3048\u308b\u3002\r\nimgRGB = img&#x5B;:,:,&#x5B;2,1,0]]\r\n<\/pre>\n<p>\u8a66\u3057\u306b PIL\u3067 RGB\u30ab\u30e9\u30fc\u753b\u50cf\u3068\u3057\u3066\u8868\u793a\u3057\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n# \u8868\u793a\r\nfrom PIL import Image\r\nimgP = Image.fromarray(imgRGB)\r\nimgP.show()\r\n<\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/python\/wp-content\/uploads\/2018\/09\/result.png\" alt=\"\" \/><br \/>\nOK\u3060\uff01<\/p>\n<hr class=\"my_hr_bottom\">\n","protected":false},"excerpt":{"rendered":"<p>1. \u3084\u308a\u305f\u3044\u3053\u3068 \u30ab\u30e9\u30fc\u753b\u50cf\u3092 OpenCV\u3067\u30ed\u30fc\u30c9\u3057\u305f\u5834\u5408\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u914d\u5217\u4e2d\u306e\u4e26\u3073\u9806\u306f BGR \u3067\u3042\u308b\u3002 \u3053\u308c\u3092 RGB \u306e\u4e26\u3073\u9806\u306b\u5909\u66f4\u3057\u305f\u3044\u3002 2. \u672c\u5f53\u306b BGR\u306a\u306e\u304b\u3092\u78ba\u8a8d \u3053\u3093\u306a\u753b\u50cf\u3092\u7528\u610f\u3057\u305f\u3002 \u3053\u306e\u753b\u50cf\u3092 \u2026 <span class=\"read-more\"><a href=\"https:\/\/www.dogrow.net\/python\/blog100\/\">\u7d9a\u304d\u3092\u8aad\u3080 &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1836","post","type-post","status-publish","format-standard","hentry","category-opencv"],"views":11542,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/posts\/1836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/comments?post=1836"}],"version-history":[{"count":12,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/posts\/1836\/revisions"}],"predecessor-version":[{"id":1878,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/posts\/1836\/revisions\/1878"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/media?parent=1836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/categories?post=1836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/python\/wp-json\/wp\/v2\/tags?post=1836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}