{"id":952,"date":"2026-07-11T16:33:16","date_gmt":"2026-07-11T16:33:16","guid":{"rendered":"https:\/\/boochlin.com\/?p=952"},"modified":"2026-08-18T09:02:08","modified_gmt":"2026-08-18T09:02:08","slug":"android-%e7%88%9b%e8%a3%9d%e7%bd%ae%e6%83%b3%e8%b7%91%e4%ba%ba%e8%87%89%e8%be%a8%e8%ad%988-yuv_420_888-%e9%82%84%e8%83%bd%e6%80%8e%e6%a8%a3%e5%8a%a0%e9%80%9f-qfastcv","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=952","title":{"rendered":"Android \u721b\u88dd\u7f6e\u60f3\u8dd1\u4eba\u81c9\u8fa8\u8b588-YUV_420_888 \u9084\u80fd\u600e\u6a23\u52a0\u901f QFastCV"},"content":{"rendered":"\n<p>\u524d\u5e7e\u7bc7\u6211\u5011\u5728\u8ddf GC \u640f\u9b25\u3001\u8ddf\u8a18\u61b6\u9ad4\u7b97\u5e33\u3001\u8ddf CPU \u7684\u6307\u4ee4\u9031\u671f\u65a4\u65a4\u8a08\u8f03\u3002<\/p>\n\n\n\n<p>\u4eca\u5929\u63db\u500b\u6230\u5834\uff1a\u5728\u5f71\u50cf\u8cc7\u6599\u9001\u9032 AI \u6a21\u578b\u4e4b\u524d\uff0c\u5c07\u76f8\u6a5f\u5410\u51fa\u4f86\u7684 <code>YUV_420_888<\/code> \u8f49\u63db\u70ba\u6a21\u578b\u6240\u9700\u7684\u683c\u5f0f\uff0c\u662f\u6574\u500b\u6d41\u6c34\u7dda\u4e2d\u6700\u5bb9\u6613\u88ab\u5ffd\u8996\u3001\u537b\u80fd\u62fc\u51fa\u6975\u5927\u52a0\u901f\u7a7a\u9593\u7684\u95dc\u9375\u74b0\u7bc0\u3002<\/p>\n\n\n\n<p>\u5728\u6211\u5011\u9019\u53f0 1.3GHz \u5f31 CPU \u7684\u7834\u677f\u5b50\u4e0a\uff0c\u5149\u662f\u505a\u4e00\u6b21 YUV \u683c\u5f0f\u8f49\u63db\u8207\u53bb Padding\uff0c\u7d14 Java \u5beb\u6cd5\u5c31\u5403\u6389\u4e86\u5c07\u8fd1 15ms\uff08\u76f8\u7576\u65bc\u534a\u5e40\u7684\u9810\u7b97\uff09\u3002\u76f4\u5230\u6211\u6df1\u5165\u7814\u7a76\u76f8\u6a5f\u786c\u9ad4\u70ba\u4ec0\u9ebc\u8981\u5410\u51fa\u9019\u7a2e\u602a\u7570\u683c\u5f0f\uff0c\u624d\u767c\u73fe\u9019\u4e0d\u662f Android \u7684\u934b\uff0c\u800c\u662f\u5e7e\u5341\u5e74\u524d\u77fd\u6676\u7247\u8a2d\u8a08\u5e2b\u7559\u4e0b\u7684\u6b77\u53f2\u696d\u969c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4eba\u773c\u5c0d\u984f\u8272\u662f\u778e\u5b50\uff1aYUV420 \u7684\u751f\u7406\u5b78\u751c\u871c\u9ede<\/h2>\n\n\n\n<p><code>YUV_420_888<\/code> \u9019\u500b\u683c\u5f0f\u7684\u8a95\u751f\uff0c\u6839\u6e90\u5728\u65bc\u4eba\u985e\u773c\u775b\u7684\u751f\u7406\u7f3a\u9677\u3002<\/p>\n\n\n\n<p>\u4eba\u773c\u4e2d\u8ca0\u8cac\u611f\u77e5\u4eae\u5ea6\u7684\u8996\u687f\u7d30\u80de\u6709 1.2 \u5104\u500b\uff0c\u800c\u8ca0\u8cac\u611f\u77e5\u984f\u8272\u7684\u8996\u9310\u7d30\u80de\u53ea\u6709 600 \u842c\u500b\u3002\u4e5f\u5c31\u662f\u8aaa\uff1a\u4eba\u985e\u5927\u8166\u5c0d\u300c\u660e\u6697\u908a\u754c\u300d\u6975\u5ea6\u654f\u611f\uff0c\u4f46\u5c0d\u300c\u8272\u5f69\u7d30\u7bc0\u300d\u5176\u5be6\u662f\u500b\u534a\u778e\u5b50\u3002<\/p>\n\n\n\n<p>\u5de5\u7a0b\u5e2b\u6293\u4f4f\u9019\u500b\u751f\u7406\u7f3a\u9677\u8a2d\u8a08\u4e86 YUV\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>Y\uff08Luma \u4eae\u5ea6\uff09<\/strong>\uff1a\u6bcf\u500b\u50cf\u7d20\u90fd\u5b8c\u6574\u4fdd\u7559\uff0c\u4e00\u500b\u90fd\u4e0d\u80fd\u5c11\u3002<\/li>\n\n\n\n<li><strong>U\u3001V\uff08Chroma \u8272\u5ea6\uff09<\/strong>\uff1a\u4eba\u773c\u770b\u4e0d\u51fa\u7d30\u7bc0\uff0c\u90a3\u5c31\u8b93 2\u00d72 \u7684\u56db\u500b\u50cf\u7d20\u5171\u7528\u4e00\u7d44 U \u548c V \u5373\u53ef\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u540c\u6a23\u662f 4 \u500b\u50cf\u7d20\uff1a<\/p>\n\n\n\n<ul>\n<li>RGB \u683c\u5f0f\u9700\u8981 4 \u00d7 3 = 12 bytes\u3002<\/li>\n\n\n\n<li>YUV420 \u683c\u5f0f\u53ea\u9700\u8981 4 (Y) + 1 (U) + 1 (V) = 6 bytes\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8a18\u61b6\u9ad4\u983b\u5bec\u8207\u5132\u5b58\u7a7a\u9593\u76f4\u63a5\u780d\u534a\uff08\u7701\u4e0b 50%\uff09\uff0c\u800c\u4eba\u773c\u5e7e\u4e4e\u770b\u4e0d\u51fa\u756b\u8cea\u5dee\u5225\u3002\u9019\u5c31\u662f\u70ba\u4ec0\u9ebc\u5168\u7403\u6240\u6709\u76f8\u6a5f\u611f\u6e2c\u5668\u8207\u8996\u8a0a\u7de8\u89e3\u78bc\u5668\uff0c\u5168\u90e8\u9810\u8a2d\u4f7f\u7528 YUV420\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">UV \u70ba\u4ec0\u9ebc\u662f\u4ea4\u932f\u5b58\u7684\uff1f\uff08Semi-Planar NV21 \u7684\u786c\u9ad4\u6b77\u53f2\uff09<\/h2>\n\n\n\n<p>\u7576\u4f60\u5f9e Android Camera2 \u53d6\u5f97 YUV \u8cc7\u6599\u6642\uff0cUV \u8a18\u61b6\u9ad4\u4f48\u5c40\u9577\u6210\u9019\u6a23\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nY \u5e73\u9762: &#x5B;Y0 Y1 Y2 Y3 Y4 Y5 ...]\nUV \u5e73\u9762: &#x5B;U0 V0 U1 V1 U2 V2 ...]  &amp;lt;-- U \u548c V \u4ea4\u932f\u64e0\u5728\u4e00\u8d77\n<\/pre><\/div>\n\n\n<p>U \u548c V \u4ea4\u932f\u5b58\u653e\u5728\u540c\u4e00\u500b Buffer \u4e2d\uff0c\u9019\u53eb <strong>Semi-Planar\uff08NV21 \/ NV12\uff09<\/strong>\u3002<\/p>\n\n\n\n<p>\u70ba\u4ec0\u9ebc\u4e0d\u4e7e\u8106\u628a U \u548c V \u5b8c\u5168\u5206\u958b\u5b58\u653e\uff08\u5373 Planar \u683c\u5f0f\uff0c\u5982 I420\uff09\uff1f<strong>\u56e0\u70ba\u76f8\u6a5f ISP \u786c\u9ad4\u5de5\u7a0b\u5e2b\u8981\u7701\u6210\u672c\u3002<\/strong><\/p>\n\n\n\n<p>\u76f8\u6a5f\u5167\u90e8\u7684 ISP\uff08\u5f71\u50cf\u8a0a\u865f\u8655\u7406\u5668\uff09\u900f\u904e DMA \u5f15\u64ce\u5c07\u50cf\u7d20\u642c\u79fb\u5230\u8a18\u61b6\u9ad4\uff0c\u5176\u904b\u4f5c\u65b9\u5f0f\u50cf\u6383\u63cf\u6a5f\u4e00\u6a23\u5f9e\u7b2c 0 \u884c\u9010\u884c\u6383\u5230\u6700\u5f8c\u4e00\u884c\u3002\u7576 ISP \u6383\u5b8c\u6bcf\u5169\u884c Y \u6642\uff0c\u5c0d\u61c9\u7684\u4e00\u7d44 U \u548c V \u525b\u597d\u8a08\u7b97\u5b8c\u6210\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u9078 Semi-Planar<\/strong>\uff1aU \u548c V \u7b97\u51fa\u4f86\u5c31\u76f4\u63a5\u4ea4\u932f\u5beb\u5165\u8a18\u61b6\u9ad4\uff0c\u96fb\u8def\u8a2d\u8a08\u6700\u7c21\u55ae\u3001\u6676\u7247\u9762\u7a4d\u6700\u5c0f\u3001\u6210\u672c\u6700\u4f4e\u3002<\/li>\n\n\n\n<li><strong>\u9078 Planar<\/strong>\uff1a\u5fc5\u9808\u5728\u6676\u7247\u5167\u589e\u52a0\u984d\u5916\u7684 SRAM \u5feb\u53d6\uff0c\u628a U \u5168\u90e8\u66ab\u5b58\u8d77\u4f86\uff0c\u7b49\u6574\u5f35\u5716\u7684 Y \u5beb\u5b8c\u5f8c\u518d\u5206\u6279\u5beb\u5165 U \u8207 V\u3002\u9019\u9700\u8981\u66f4\u8907\u96dc\u7684\u786c\u9ad4\u6392\u7a0b\u5668\uff0c\u6676\u7247\u6210\u672c\u76f4\u7dda\u4e0a\u5347\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5e7e\u5341\u5e74\u524d\u5de5\u7a0b\u5e2b\u5728\u77fd\u6676\u7247\u6210\u672c\u58d3\u529b\u4e0b\u7684\u59a5\u5354\uff0c\u5c31\u9019\u6a23\u8b8a\u6210\u4e86\u6211\u5011\u4eca\u5929\u5fc5\u9808\u9762\u5c0d\u7684\u6a19\u6e96\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u70ba\u4ec0\u9ebc\u6bcf\u884c\u672b\u5c3e\u6709\u591a\u9918\u7684\u5783\u573e\uff1f\uff08Row Stride \u7684 64-byte \u5c0d\u9f4a\uff09<\/h2>\n\n\n\n<p>\u5728\u6211\u5011\u7684\u9580\u7981\u6a5f\u4e2d\uff0c\u7576 RGB \u76f8\u6a5f\u5207\u63db\u5230 800\u00d7600 \u89e3\u6790\u5ea6\u6642\uff08\u898b <code>CameraRgbHelpler.java<\/code>\uff09\uff0c\u4f60\u6703\u767c\u73fe\u4e00\u500b\u8a6d\u7570\u73fe\u8c61\uff1a\u6bcf\u884c\u6709\u6548\u50cf\u7d20\u660e\u660e\u53ea\u6709 800 bytes\uff0c\u4f46\u5e95\u5c64 Buffer \u7684\u6bcf\u884c\u8de8\u5ea6\uff08Row Stride\uff09\u537b\u662f <strong>832 bytes<\/strong>\u3002<\/p>\n\n\n\n<p>\u591a\u51fa\u4f86\u7684 32 bytes \u5168\u662f\u7121\u610f\u7fa9\u7684 Padding \u5783\u573e\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\u884c 0: &#x5B;800 bytes \u6709\u6548 Y \u6578\u64da] &#x5B;32 bytes \u5783\u573e Padding]\n\u884c 1: &#x5B;800 bytes \u6709\u6548 Y \u6578\u64da] &#x5B;32 bytes \u5783\u573e Padding]\n... \u5171 600 \u884c\n<\/pre><\/div>\n\n\n<p>\u9019\u662f\u56e0\u70ba\u9ad8\u901a SoC \u7684 CPU \u8207\u8a18\u61b6\u9ad4\u532f\u6d41\u6392\uff08System Bus\uff09\u4ee5 64 bytes \u70ba\u4e00\u500b\u50b3\u8f38\u5340\u584a\uff08Burst Transfer\uff09\uff0c\u4e14\u8981\u6c42\u6bcf\u6b21 DMA \u50b3\u8f38\u7684\u8d77\u59cb\u4f4d\u5740\u5fc5\u9808\u662f 64 \u7684\u6574\u6578\u500d\u3002<\/p>\n\n\n\n<p>800 \u4e0d\u662f 64 \u7684\u500d\u6578\uff08800 \/ 64 = 12.5\uff09\u3002\u70ba\u4e86\u8b93 DMA \u50b3\u8f38\u6548\u7387\u9054\u5230\u786c\u9ad4\u6700\u9ad8\u5cf0\u503c\uff0cISP \u6703\u81ea\u52d5\u5728\u6bcf\u884c\u672b\u5c3e\u88dc\u9f4a 32 bytes \u5783\u573e\uff0c\u6e4a\u6210 832\uff08832 \/ 64 = 13\uff0c\u5b8c\u7f8e\u6574\u9664\uff09\u3002<\/p>\n\n\n\n<p>\u786c\u9ad4\u723d\u4e86\uff0c\u4ee3\u50f9\u662f\u8edf\u9ad4\u5de5\u7a0b\u5e2b\u5fc5\u9808\u5728\u8cc7\u6599\u9935\u9032 AI \u6a21\u578b\u524d\uff0c\u624b\u52d5\u628a\u6bcf\u884c\u672b\u5c3e\u7684 32 bytes \u5783\u573e\u6311\u51fa\u4f86\u6254\u6389\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u539f\u672c\u600e\u9ebc\u505a\u7684\uff1a\u7d14 Java \u82e6\u5de5\uff0824 \u842c\u6b21\u908a\u754c\u6aa2\u67e5\uff09<\/h2>\n\n\n\n<p>\u5728\u5c0e\u5165\u786c\u9ad4\u52a0\u901f\u524d\uff0c\u6211\u5011\u5728 <code>CameraRgbHelpler.java<\/code> \u4e2d\u7684\u5099\u7528\u8def\u5f91\u5beb\u4e86\u6a19\u6e96\u7684 Java \u8f49\u63db\u8ff4\u5708\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/\/ CameraRgbHelpler.java\nprivate void yuv420888toNV21(Image image, byte&#x5B;] nv21) {\n    \/\/ ... \u8655\u7406 Y \u5e73\u9762 Padding ...\n\n    \/\/ \u8655\u7406 UV \u4ea4\u932f\u63d0\u53d6\n    for (int row = 0; row &amp;lt; height \/ 2; row++) {\n        for (int col = 0; col &amp;lt; width \/ 2; col++) {\n            int vuPos = col * pixelStride + row * rowStride;\n            nv21&#x5B;pos++] = vBuffer.get(vuPos); \/\/ \u64bf\u4e00\u500b V\n            nv21&#x5B;pos++] = uBuffer.get(vuPos); \/\/ \u64bf\u4e00\u500b U\n        }\n    }\n}\n<\/pre><\/div>\n\n\n<p>\u5728 800\u00d7600 \u89e3\u6790\u5ea6\u4e0b\uff0cUV \u5e73\u9762\u7684\u5c3a\u5bf8\u662f 400\u00d7300\uff1a<\/p>\n\n\n\n<ul>\n<li>\u96d9\u91cd\u8ff4\u5708\u7e3d\u5171\u8981\u57f7\u884c 400 \u00d7 300 = 120,000 \u6b21\u3002<\/li>\n\n\n\n<li>\u7e3d\u8a08\u57f7\u884c <strong>24 \u842c\u6b21\u9663\u5217\u5b58\u53d6\u8207 <code>ByteBuffer.get()<\/code><\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<p>Java \u865b\u64ec\u6a5f\u5728\u6bcf\u6b21\u547c\u53eb <code>get()<\/code> \u6642\uff0c\u5e95\u5c64\u90fd\u6703\u5f37\u5236\u505a\u4e00\u6b21\u8a18\u61b6\u9ad4\u908a\u754c\u6aa2\u67e5\uff08Bounds Checking\uff09\u3002\u5728 1.3GHz \u7684\u5f31 CPU \u4e0a\uff0c\u9019 24 \u842c\u6b21\u5b89\u5168\u78ba\u8a8d\u76f4\u63a5\u5403\u6389\u4e86 <strong>5 ~ 15ms<\/strong>\uff01\u5728 30fps\uff08\u6bcf\u5e40\u50c5 33.3ms\uff09\u7684\u6d41\u6c34\u7dda\u4e2d\uff0c\u5149\u683c\u5f0f\u8f49\u63db\u5c31\u5403\u6389\u5c07\u8fd1\u4e00\u534a\u7684\u7b97\u529b\u9810\u7b97\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u63db\u6210 QFastCV\uff1a\u4e00\u884c\u641e\u5b9a\uff08&lt; 1ms\uff09<\/h2>\n\n\n\n<p>\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u74f6\u9838\uff0c\u6211\u5011\u5728\u76f8\u6a5f\u6d41\u6c34\u7dda\u4e2d\u639b\u8f09\u9ad8\u901a\u539f\u751f <strong>QFastCV<\/strong> \u5eab\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/\/ CameraRgbHelpler.java\nif (true == useFastCv) {\n    \/\/ \u5c07 Y \u8207 UV \u62f7\u8c9d\u5230\u9810\u5148\u5206\u914d\u597d\u7684\u9435\u7897 Buffer\n    byteBuffer0.get(bufferY, 0, yuvPlane0Size);\n    byteBuffer1.get(bufferU, 0, yuvPlane1Size);\n\n    \/\/ \u8abf\u7528\u9ad8\u901a Native \u51fd\u5f0f\u5eab\uff1a\u53bb Padding + \u62c6 UV \u4e00\u6b65\u5230\u4f4d\n    result = QFastCV.yuv420SPToYuv420P(\n        bufferY, bufferU,\n        CAM_RGB_WIDTH, CAM_RGB_HEIGHT,\n        image.getPlanes()&#x5B;0].getRowStride(), \/\/ \u81ea\u52d5\u8655\u7406 Row Stride Padding\n        image.getPlanes()&#x5B;1].getRowStride(),\n        dstY, dstU, dstV,\n        0, 0, 0\n    );\n}\n<\/pre><\/div>\n\n\n<p>\u8f49\u63db\u8017\u6642\u76f4\u63a5\u5f9e\u539f\u672c\u7684 15ms \u66b4\u8dcc\u5230 <strong>&lt; 1ms<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">QFastCV \u6191\u4ec0\u9ebc\u9019\u9ebc\u5feb\uff1f\uff08ARM NEON \u5411\u91cf\u6307\u4ee4\u89e3\u5bc6\uff09<\/h2>\n\n\n\n<p>\u70ba\u4ec0\u9ebc C++ \u547c\u53eb QFastCV \u80fd\u7522\u751f\u8d85\u904e 15 \u500d\u7684\u6548\u80fd\u5dee\u8ddd\uff1f\u6838\u5fc3\u79d8\u5bc6\u5728\u65bc ARM NEON SIMD\uff08\u55ae\u6307\u4ee4\u591a\u8cc7\u6599\u6d41\uff09\u7684\u5c08\u5c6c\u786c\u9ad4\u6307\u4ee4\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u96f6 JVM \u908a\u754c\u6aa2\u67e5<\/strong>\uff1a<br>C++ \u76f4\u63a5\u64cd\u4f5c\u8a18\u61b6\u9ad4\u539f\u751f\u6307\u6a19\uff0c\u90a3 24 \u842c\u6b21 Java \u865b\u64ec\u6a5f\u7684\u5b89\u5168\u908a\u754c\u6aa2\u67e5\u76f4\u63a5\u6b78\u96f6\u3002<\/li>\n\n\n\n<li><strong>ARM NEON <code>VLD2<\/code> \u5c08\u5c6c\u5411\u91cf\u6307\u4ee4<\/strong>\uff1a<br>ARM \u67b6\u69cb\u5c08\u9580\u70ba\u62c6\u89e3\u4ea4\u932f\u8cc7\u6599\u8a2d\u8a08\u4e86 <strong><code>VLD2<\/code>\uff08Vector Load 2-element structure\uff09<\/strong> \u6307\u4ee4\u3002<br>\u50b3\u7d71 CPU \u8b80\u53d6 <code>U0 V0 U1 V1 ...<\/code> \u9700\u8981\u9032\u884c 16 \u6b21\u8b80\u53d6\u8207\u4f4d\u79fb\u64cd\u4f5c\uff1b\u800c NEON \u6307\u4ee4 <code>vld2.8 {d0, d1}, [r0]!<\/code> \u53ef\u4ee5\u5728 <strong>1 \u500b\u6642\u8108\u9031\u671f\u5167<\/strong>\uff0c\u76f4\u63a5\u5c07\u8a18\u61b6\u9ad4\u4e2d\u9023\u7e8c\u7684 16 bytes \u62c6\u89e3\u6210\u7368\u7acb\u7684 8 \u500b U \u66ab\u5b58\u5668\uff08d0\uff09\u8207 8 \u500b V \u66ab\u5b58\u5668\uff08d1\uff09\u3002Java \u8981\u8dd1 16 \u6b21\u8ff4\u5708\u7684\u4e8b\uff0cNEON \u9760\u786c\u9ad4\u96fb\u8def\u4e00\u500b\u6307\u4ee4\u641e\u5b9a\u3002<\/li>\n\n\n\n<li><strong>\u8a18\u61b6\u9ad4\u9023\u7e8c\u5beb\u5165\uff08Cache Line Friendly\uff09<\/strong>\uff1a<br>\u62c6\u89e3\u5f8c\u7684 U \u8207 V \u900f\u904e <code>VST1<\/code> \u5411\u91cf\u6307\u4ee4\u9023\u7e8c\u5beb\u5165\u7368\u7acb\u7684 Planar \u7de9\u885d\u5340\uff0c\u5b8c\u7f8e\u5951\u5408 CPU L1\/L2 \u5feb\u53d6\u884c\uff0c\u6700\u5927\u5316\u8a18\u61b6\u9ad4\u5beb\u5165\u541e\u5410\u91cf\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u8def\u76f8\u6a5f\u8cc7\u6599\u6d41\uff0c\u8ab0\u771f\u6b63\u53d7\u76ca\uff1f<\/h2>\n\n\n\n<p>\u9019\u5957 QFastCV \u52a0\u901f\u53ea\u5c0d RGB \u76f8\u6a5f\u751f\u6548\uff0c\u56e0\u70ba\u53ea\u6709\u5b83\u727d\u6d89\u5230\u8907\u96dc\u7684\u8272\u5f69\u7a7a\u9593\u8f49\u63db\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>RGB \u93e1\u982d\uff08800\u00d7600 \/ 640\u00d7480 YUV_420_888\uff09<\/strong>\uff1a<br>\u6700\u5927\u53d7\u76ca\u8005\u3002\u5fb9\u5e95\u89e3\u6c7a Semi-Planar \u62c6\u5206\u8207 Row Stride \u53bb Padding \u7684\u8a08\u7b97\u74f6\u9838\uff0c\u55ae\u5e40\u8017\u6642\u7bc0\u7701 14ms\u3002<\/li>\n\n\n\n<li><strong>Sony IMX516 ToF \u6df1\u5ea6\u93e1\u982d\uff08640\u00d71920 RAW12\uff09<\/strong>\uff1a<br>\u7121\u95dc\u3002ToF \u8f38\u51fa\u7684\u662f\u7d14 3D \u6df1\u5ea6\u539f\u59cb Raw \u8a0a\u865f\uff0c\u6c92\u6709\u984f\u8272\u8207 UV \u5206\u91cf\uff0c\u76f4\u63a5\u4ee5 <code>byteBuffer.get(buffer)<\/code> \u6574\u5305\u642c\u5165\u8a18\u61b6\u9ad4\u3002<\/li>\n\n\n\n<li><strong>IR \u7d05\u5916\u93e1\u982d\uff08640\u00d7480 \u7070\u968e\uff09<\/strong>\uff1a<br>\u7121\u95dc\u3002IR \u5f71\u50cf\u662f\u7531 ToF Raw \u8a0a\u865f\u7d93 <code>RawToDepthSDK<\/code> \u89e3\u7b97\u51fa\u7684\u55ae\u901a\u9053 8-bit \u7070\u968e\u5716\uff0c\u6bcf\u500b\u50cf\u7d20\u50c5\u4f54 1 byte\uff0c\u5b8c\u5168\u6c92\u6709 UV \u4ea4\u932f\u554f\u984c\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d50\u8a9e<\/h2>\n\n\n\n<p><code>YUV_420_888<\/code>\u3001<code>Semi-Planar<\/code>\u3001<code>Row Stride<\/code>\u2014\u2014\u9019\u4e09\u500b\u6982\u5ff5\u8ffd\u6839\u7a76\u5e95\uff0c\u90fd\u662f\u5e7e\u5341\u5e74\u524d\u6676\u7247\u8a2d\u8a08\u5e2b\u5728\u6709\u9650\u7684\u77fd\u6676\u5713\u9762\u7a4d\u8207\u8a18\u61b6\u9ad4\u983b\u5bec\u58d3\u529b\u4e0b\uff0c\u505a\u51fa\u7684\u6700\u52d9\u5be6\u786c\u9ad4\u59a5\u5354\u3002<\/p>\n\n\n\n<p>\u4f60\u4e0d\u7406\u89e3\u5e95\u5c64\u786c\u9ad4\u539f\u7406\uff0c\u5c31\u770b\u4e0d\u61c2\u70ba\u4ec0\u9ebc\u4e00\u500b\u770b\u4f3c\u7c21\u55ae\u7684\u300c\u683c\u5f0f\u8f49\u63db\u300d\u80fd\u5403\u6389 15ms\u3002\u641e\u61c2\u6574\u689d\u56e0\u679c\u93c8\u4e4b\u5f8c\uff0c\u624d\u80fd\u7cbe\u6e96\u4e0b\u5200\u2014\u2014\u7528\u9ad8\u901a QFastCV \u8207 ARM NEON \u5411\u91cf\u6307\u4ee4\uff0c\u5728 1 \u500b\u6642\u8108\u9031\u671f\u5167\u505a\u6389 Java \u8981\u8dd1 16 \u6b21\u8ff4\u5708\u7684\u4e8b\u3002<\/p>\n\n\n\n<p>\u5728\u4f4e\u914d\u908a\u7de3\u8a2d\u5099\u4e0a\uff0c\u6bcf\u4e00\u500b\u4f60\u4ee5\u70ba\u300c\u61c9\u8a72\u5f88\u5feb\u300d\u7684\u7d30\u7bc0\uff0c\u90fd\u53ef\u80fd\u85cf\u8457\u62d6\u57ae\u6574\u500b\u7cfb\u7d71\u7684\u6697\u7bad\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c3\u8003\u8cc7\u6599 (References)<\/h2>\n\n\n\n<ol>\n<li><strong>ARM NEON Technology<\/strong>: Vector Load and Store Instructions (VLD2\/VST2).<br><a href=\"https:\/\/developer.arm.com\/architectures\/instruction-sets\/simd-isas\/neon\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/developer.arm.com\/architectures\/instruction-sets\/simd-isas\/neon<\/a><\/li>\n\n\n\n<li><strong>Qualcomm FastCV Computer Vision SDK<\/strong>: Developer Guide and API Reference.<br><a href=\"https:\/\/developer.qualcomm.com\/software\/fastcv-sdk\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/developer.qualcomm.com\/software\/fastcv-sdk<\/a><\/li>\n\n\n\n<li><strong>Android Camera2 YUV_420_888 Image Format Specification<\/strong>.<br><a href=\"https:\/\/developer.android.com\/reference\/android\/graphics\/ImageFormat#YUV_420_888\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/developer.android.com\/reference\/android\/graphics\/ImageFormat#YUV_420_888<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u5e7e\u7bc7\u6211\u5011\u5728\u8ddf GC \u640f\u9b25\u3001\u8ddf\u8a18\u61b6\u9ad4\u7b97\u5e33\u3001\u8ddf CPU \u7684\u6307\u4ee4\u9031\u671f\u65a4\u65a4\u8a08\u8f03\u3002<\/p>\n<p>\u4eca\u5929\u63db\u500b\u6230\u5834\uff1a\u5728\u8cc7\u6599\u9032 AI \u4e4b\u524d\uff0cYUV_420_888 to RGB \u662f\u660e\u986f\u53ef\u4ee5\u62fc\u770b\u770b\u52a0\u901f\u7684\u90e8\u5206\u3002<\/p>\n<p>\u5728\u6211\u5011\u7684\u7834\u677f\u5b50\u4e0a\uff0c\u5b83\u5403\u6389\u4e86\u5c07\u8fd1\u4e00\u5e40\u7684\u9810\u7b97\u3002\u76f4\u5230\u6211\u82b1\u4e86\u9ede\u6642\u9593\u53bb\u7406\u89e3\u70ba\u4ec0\u9ebc\u76f8\u6a5f\u8981\u5410\u90a3\u7a2e\u683c\u5f0f\u7684\u8cc7\u6599\uff0c\u624d\u77e5\u9053\u9019\u4e0d\u662f Android \u7684\u934b\uff0c<\/p>\n","protected":false},"author":1,"featured_media":957,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50,3,80],"tags":[],"_links":{"self":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/952"}],"collection":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=952"}],"version-history":[{"count":4,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/952\/revisions"}],"predecessor-version":[{"id":995,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/952\/revisions\/995"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/media\/957"}],"wp:attachment":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}