{"id":127,"date":"2020-10-23T10:30:53","date_gmt":"2020-10-23T02:30:53","guid":{"rendered":"https:\/\/www.346pro.club\/?p=127"},"modified":"2020-10-23T10:30:54","modified_gmt":"2020-10-23T02:30:54","slug":"opencv%e5%9c%a8yuv420%e5%a4%84%e7%90%86%e6%97%b6%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.346pro.club\/?p=127","title":{"rendered":"OpenCV\u5728YUV420\u5904\u7406\u65f6\u7684\u95ee\u9898"},"content":{"rendered":"\n<p>\u524d\u60c5\u63d0\u8981\uff1a\u56e0\u4e3a\u5728\u7814\u7a76\u65b0\u7684\u56fe\u7247\u8f6cy4m\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u91c7\u7528\u4e86OpenCV\u7684\u65b9\u5f0f\u6765\u5904\u7406RGB\u56fe\u7247\uff0c\u5c06RGB\u56fe\u7247\u4f7f\u7528cvtColor\u51fd\u6570RGB2YUV_YV12\u7684\u65f6\u5019\uff0c\u53d1\u73b0\u989c\u8272\u6709\u4e00\u5b9a\u7684\u504f\u5dee\uff0c\u4e8e\u662f\u5728\u67e5\u627e\u662f\u4ee3\u7801\u672c\u8eab\u7684\u95ee\u9898\u8fd8\u662f\u8c03\u7528\u8fc7\u7a0b\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u7ed3\u679c\u662fOpenCV\u81ea\u5df1\u7684\u5751\uff0cOpenCV\u5728\u5b9e\u73b0RGB2YUV_YV12\u8fd9\u4e00\u8fc7\u7a0b\u7684\u65f6\u5019\uff0c\u5e76\u975e\u662f\u6309\u7167\u6807\u51c6\u7684\u5904\u7406\u65b9\u6cd5\uff0c0-255\u7684\u8303\u56f4\u6765\u5b9e\u73b0\u7684\uff0c\u800c\u662f\u4f7f\u7528\u4e8616-235\u7684\u6807\u51c6<\/p>\n\n\n\n<p>\u9644\u4e0aRGB24\u4e0eYUV420\u7684\u4e92\u8f6c\u516c\u5f0f<\/p>\n\n\n\n$Y= 0.299 \\times R+0.587 \\times G+0.114 \\times B\\\\$\n$U=-0.147 \\times R-0.289 \\times G+0.463 \\times B\\\\$\n$V= 0.615 \\times R-0.515 \\times G-0.100 \\times B\\\\$\n\n\n\n<p>\u4f46\u662f\u5728OpenCV\u91cc\u9762\u5e76\u4e0d\u9002\u7528\uff0c\u7ecf\u8fc7\u5b9e\u9a8c\uff0c\u5728COLOR_YUV2BGR_I420\u8fd9\u4e2a\u901a\u9053\uff0c\u7528\u7684\u662f\u91cf\u5316\u7684\u8f6c\u6362\u516c\u5f0f<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20191010192457225.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nod2FuX21h,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure>\n\n\n\n<p>\u6ce8\u610f\uff0c\u6b64\u5904\u5c3d\u7ba1YUV\u7684\u8303\u56f4\u662f0-255\uff0c\u4f46\u662f\u4f9d\u7136\u6309Y\u53bb\u51cf16\u53bb\u5b9e\u73b0<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20191010192506428.png#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure>\n\n\n\n<p>TODO\uff1a\u56de\u53bb\u5427OpenCV\u7684\u6e90\u7801\u6539\u4e00\u4e0b\u91cd\u65b0\u7f16\u8bd1\u4e00\u904d\uff0c\u770b\u770b\u80fd\u4e0d\u80fd\u628a\u51fd\u6570\u516c\u5f0f\u7684\u8ba1\u7b97\u65b9\u6cd5\u4fee\u6b63\u4e00\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u60c5\u63d0\u8981\uff1a\u56e0\u4e3a\u5728\u7814\u7a76\u65b0\u7684\u56fe\u7247\u8f6cy4m\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u91c7&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/www.346pro.club\/?p=127\">Continue reading<span class=\"screen-reader-text\">OpenCV\u5728YUV420\u5904\u7406\u65f6\u7684\u95ee\u9898<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-127","post","type-post","status-publish","format-standard","hentry","category-technology","entry"],"_links":{"self":[{"href":"https:\/\/www.346pro.club\/index.php?rest_route=\/wp\/v2\/posts\/127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.346pro.club\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.346pro.club\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.346pro.club\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.346pro.club\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=127"}],"version-history":[{"count":0,"href":"https:\/\/www.346pro.club\/index.php?rest_route=\/wp\/v2\/posts\/127\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.346pro.club\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.346pro.club\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.346pro.club\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}