{"id":1282,"date":"2023-08-03T10:40:10","date_gmt":"2023-08-03T10:40:10","guid":{"rendered":"http:\/\/www.recologypower.com:9080\/?p=1282"},"modified":"2023-08-03T10:40:11","modified_gmt":"2023-08-03T10:40:11","slug":"%e3%80%90%e5%9b%be%e5%83%8f%e3%80%91yuv-%e5%b8%b8%e7%94%a8%e5%9b%be%e5%83%8f%e6%a0%bc%e5%bc%8f-nv12%e3%80%81nv2%e3%80%81i420%e3%80%81yv12%e3%80%81yuyv-%e5%83%8f%e7%b4%a0%e5%88%86%e5%b8%83","status":"publish","type":"post","link":"http:\/\/www.recologypower.com:9080\/?p=1282","title":{"rendered":"\u3010\u56fe\u50cf\u3011YUV \u5e38\u7528\u56fe\u50cf\u683c\u5f0f NV12\u3001NV2\u3001I420\u3001YV12\u3001YUYV \u50cf\u7d20\u5206\u5e03"},"content":{"rendered":"\n<p>\u5e38\u7528\u56fe\u50cf\u50cf\u7d20\u683c\u5f0f RGB \u548c YUV<br>\u8fd1\u671f\u7531\u4e8e\u9879\u76ee\u9700\u8981\uff0c\u5f00\u59cb\u63a5\u89e6\u56fe\u50cf\u50cf\u7d20\u683c\u5f0f\uff0c\u56e0\u6b64\u5728\u8fd9\u91cc\u505a\u4e00\u4e2a\u5c0f\u7ed3\u3002<\/p>\n\n\n\n<p>\u50cf\u7d20\u683c\u5f0f\u63cf\u8ff0\u4e86\u50cf\u7d20\u6570\u636e\u5b58\u50a8\u6240\u7528\u7684\u683c\u5f0f\uff0c\u5b9a\u4e49\u4e86\u50cf\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u7f16\u7801\u65b9\u5f0f\u3002RGB \u548c YUV \u4e3a\u4e24\u79cd\u7ecf\u5e38\u4f7f\u7528\u7684\u50cf\u7d20\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>RGB \u548c RGBA \u683c\u5f0f<br>RGB \u56fe\u50cf\u5177\u6709\u4e09\u4e2a\u901a\u9053 R\u3001G\u3001B\uff0c\u5206\u522b\u5bf9\u5e94\u7ea2\u3001\u7eff\u3001\u84dd\u4e09\u4e2a\u5206\u91cf\uff0c\u7531\u4e09\u4e2a\u5206\u91cf\u7684\u503c\u51b3\u5b9a\u989c\u8272\uff0c\u4e00\u822c\u4e5f\u53eb\u505a RGB24\uff1b<br>RGBA \u662f RGB \u56fe\u50cf\u52a0\u4e00\u4e2a\u901a\u9053 alpha\uff0c\u5373\u900f\u660e\u5ea6\uff0c\u4e8e\u662f\u5171\u6709\u56db\u4e2a\u5206\u91cf\u5171\u540c\u63a7\u5236\u989c\u8272\uff0c\u4e00\u822c\u4e5f\u53eb\u505a RGB32\u3002<\/p>\n\n\n\n<p>YUV \u683c\u5f0f<br>YUV \u56fe\u50cf\u662f\u6307\u5c06\u4eae\u5ea6\u53c2\u91cf Y \u548c\u8272\u5ea6\u53c2\u91cf U\/V \u5206\u5f00\u8868\u793a\u7684\u50cf\u7d20\u683c\u5f0f\uff0c\u4e3b\u8981\u7528\u4e8e\u4f18\u5316\u5f69\u8272\u89c6\u9891\u4fe1\u53f7\u7684\u4f20\u8f93\u3002<br>YUV \u50cf\u7d20\u683c\u5f0f\u6765\u6e90\u4e8e RGB \u50cf\u7d20\u683c\u5f0f\uff0c\u901a\u8fc7\u516c\u5f0f\u8fd0\u7b97\uff0cYUV \u4e09\u5206\u91cf\u53ef\u4ee5\u8fd8\u539f\u51fa RGB\uff0cYUV \u8f6c RGB \u7684\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    R = Y + 1.403V\r\n    G = Y - 0.344U - 0.714V\r\n    B = Y + 1.770U\r<\/code><\/pre>\n\n\n\n<p>\u4e00\u822c\uff0c\u5c06 RGB \u548c YUV \u7684\u8303\u56f4\u5747\u9650\u5236\u5728\u00a0<code>[0, 255]<\/code>\u00a0\u95f4\uff0c\u5219\u6709\u5982\u4e0b\u8f6c\u6362\u516c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>R = Y + 1.403(V - 128\uff09\r\nG = Y - 0.344(U - 128) - 0.714(V - 128)\r\nB = Y + 1.770(U - 128)\r<\/code><\/pre>\n\n\n\n<p>\u9274\u4e8e RGB \u683c\u5f0f\u5df2\u7ecf\u89c1\u5f97\u89c1\u591a\uff0c\u672c\u6587\u4e3b\u8981\u603b\u7ed3 YUV \u5e38\u89c1\u7684\u51e0\u79cd\u50cf\u7d20\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>YUV \u91c7\u6837<br>YUV \u76f8\u6bd4\u4e8e RGB \u683c\u5f0f\u6700\u5927\u7684\u597d\u5904\u662f\u53ef\u4ee5\u505a\u5230\u5728\u4fdd\u6301\u56fe\u50cf\u8d28\u91cf\u964d\u4f4e\u4e0d\u660e\u663e\u7684\u524d\u63d0\u4e0b\uff0c\u51cf\u5c0f\u6587\u4ef6\u5927\u5c0f\u3002YUV \u683c\u5f0f\u4e4b\u6240\u4ee5\u80fd\u591f\u505a\u5230\uff0c\u662f\u56e0\u4e3a\u8fdb\u884c\u4e86\u91c7\u6837\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>YUV \u7801\u6d41\u7684\u5b58\u50a8\u683c\u5f0f\u4e0e\u5176\u91c7\u6837\u65b9\u5f0f\u5bc6\u5207\u76f8\u5173\uff0c\u4e3b\u6d41\u7684\u91c7\u6837\u65b9\u5f0f\u6709\u4e09\u79cd\uff1aYUV 4:4:4(YUV444)\uff0cYUV 4:2:2(YUV422)\uff0cYUV 4:2:0(YUV420)\u3002<\/p>\n\n\n\n<p>\u82e5\u4ee5\u4ee5\u9ed1\u70b9\u8868\u793a\u91c7\u6837\u8be5\u50cf\u7d20\u70b9\u7684 Y \u5206\u91cf\uff0c\u4ee5\u7a7a\u5fc3\u5706\u5708\u8868\u793a\u91c7\u7528\u8be5\u50cf\u7d20\u70b9\u7684 UV \u5206\u91cf\uff0c\u5219\u8fd9\u4e09\u79cd\u91c7\u6837\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"713\" height=\"200\" src=\"http:\/\/www.recologypower.com:9080\/wp-content\/uploads\/2023\/08\/f1b7928fc29589c5e2255b81d49c421c.png\" alt=\"\" class=\"wp-image-1283\" srcset=\"http:\/\/www.recologypower.com:9080\/wp-content\/uploads\/2023\/08\/f1b7928fc29589c5e2255b81d49c421c.png 713w, http:\/\/www.recologypower.com:9080\/wp-content\/uploads\/2023\/08\/f1b7928fc29589c5e2255b81d49c421c-300x84.png 300w, http:\/\/www.recologypower.com:9080\/wp-content\/uploads\/2023\/08\/f1b7928fc29589c5e2255b81d49c421c-600x168.png 600w\" sizes=\"(max-width: 713px) 100vw, 713px\" \/><\/figure>\n\n\n\n<p>\u5373\uff1a<\/p>\n\n\n\n<p>YUV 4:4:4 \u91c7\u6837\uff0c\u6bcf\u4e00\u4e2a Y \u5bf9\u5e94\u4e00\u7ec4 UV \u5206\u91cf\u3002<br>YUV 4:2:2 \u91c7\u6837\uff0c\u6bcf\u4e24\u4e2a Y \u5171\u7528\u4e00\u7ec4 UV \u5206\u91cf\u3002<br>YUV 4:2:0 \u91c7\u6837\uff0c\u6bcf\u56db\u4e2a Y \u5171\u7528\u4e00\u7ec4 UV \u5206\u91cf\u3002<br>YUV \u5b58\u50a8\u683c\u5f0f<br>YUV \u5b58\u50a8\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\uff1apacked\uff08\u6253\u5305\uff09\u548c planar\uff08\u5e73\u9762\uff09\uff1b<\/p>\n\n\n\n<p>packed\uff1aY\u3001U\u3001V \u5206\u91cf\u7a7f\u63d2\u7740\u6392\u5217\uff0c\u4e09\u4e2a\u5206\u91cf\u5b58\u5728\u4e00\u4e2a Byte \u578b\u6570\u7ec4\u91cc\uff1b<\/p>\n\n\n\n<p>planar\uff1aY\u3001U\u3001V \u5206\u91cf\u5206\u522b\u5b58\u5728\u4e09\u4e2a Byte \u578b\u6570\u7ec4\u4e2d\uff1b<\/p>\n\n\n\n<p>\u5e38\u89c1\u7684\u50cf\u7d20\u683c\u5f0f<br>YUV422\uff1aYUYV\u3001YVYU\u3001UYVY\u3001VYUY<br>\u8fd9\u56db\u79cd\u683c\u5f0f\u6bcf\u4e00\u79cd\u53c8\u53ef\u4ee5\u5206\u4e3a 2 \u7c7b\uff08packed\u548cplanar\uff09\uff0c\u4ee5 YUYV \u4e3a\u4f8b\uff0c\u4e00\u4e2a 6*4 \u7684\u56fe\u50cf\u7684\u5b58\u50a8\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\tY Y Y Y Y Y                   \r\n\tY Y Y Y Y Y                  \r\n\tY Y Y Y Y Y                   \r\n\tY Y Y Y Y Y                    \r\n\tU U U U U U                  Y U Y V Y U Y V Y U Y V\r\n\tU U U U U U                  Y U Y V Y U Y V Y U Y V\r\n        V V V V V V                  Y U Y V Y U Y V Y U Y V\r\n\tV V V V V V                  Y U Y V Y U Y V Y U Y V\r\n\t- Planar -                          - Packed - \r\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">YUV420\uff1aI420(YU12)\u3001YV12\u3001NV12\u3001NV21<\/h4>\n\n\n\n<ul><li>YUV420p: I420\u3001YV12<\/li><li>YUV420sp: NV12\u3001NV21<\/li><\/ul>\n\n\n\n<p>\u540c\u6837\uff0c\u5bf9\u4e8e\u4e00\u4e2a6*4\u7684\u56fe\u50cf\uff0c\u8fd9\u56db\u79cd\u50cf\u7d20\u683c\u5f0f\u7684\u5b58\u50a8\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\tY Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y\r\n\tY Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y\r\n\tY Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y\r\n\tY Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y      Y Y Y Y Y Y\r\n\tU U U U U U      V V V V V V      U V U V U V      V U V U V U\r\n\tV V V V V V      U U U U U U      U V U V U V      V U V U V U\r\n     - I420 -          - YV12 -         - NV12 -         - NV21 -\r\n<\/code><\/pre>\n\n\n\n<ul><li>I420\u3001YV12 \u4e09\u4e2a\u5206\u91cf\u5747\u4e3a\u5e73\u9762\u683c\u5f0f\uff0c\u5373\u5206\u522b\u5b58\u5728\u4e09\u4e2a\u6570\u7ec4\u4e2d\uff1b<\/li><li>NV12\u3001NV21 \u7684\u5b58\u50a8\u683c\u5f0f\u4e3a Y \u5e73\u9762\uff0cUV \u6253\u5305\uff0c\u5373 Y \u4fe1\u606f\u5b58\u50a8\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\uff0cUV \u4fe1\u606f\u5b58\u50a8\u5728\u4e00\u4e2a\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<div class=\"slide-text-bg2\">\n<h3>\u5e38\u7528\u56fe\u50cf\u50cf\u7d20\u683c\u5f0f RGB \u548c YUV\u8fd1\u671f<\/h3>\n<\/div>\n<div class=\"flex-btn-div\"><a href=\"http:\/\/www.recologypower.com:9080\/?p=1282\" class=\"btn1 flex-btn\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[136],"tags":[],"_links":{"self":[{"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/posts\/1282"}],"collection":[{"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1282"}],"version-history":[{"count":1,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/posts\/1282\/revisions"}],"predecessor-version":[{"id":1284,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=\/wp\/v2\/posts\/1282\/revisions\/1284"}],"wp:attachment":[{"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1282"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.recologypower.com:9080\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}