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YOLOv4 \u5904\u7406\u4e00\u5f20\u56fe\u7684\u6d41\u7a0b&#xff0c;\u8fd9\u6837\u540e\u9762\u6bcf\u4e00\u9879\u6280\u672f\u653e\u5728\u54ea\u91cc\u3001\u8d77\u4ec0\u4e48\u4f5c\u7528&#xff0c;\u5c31\u90fd\u4e00\u76ee\u4e86\u7136\u4e86\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u628a\u8fd9\u5f20\u6d41\u7a0b\u62c6\u6210\u56db\u6b65\u3002\u7b2c\u4e00\u6b65\u662f\u8f93\u5165\u9884\u5904\u7406&#xff0c;\u4e00\u5f20\u4efb\u610f\u5c3a\u5bf8\u7684\u56fe\u50cf\u4f1a\u88ab\u7f29\u653e\u5230\u4e00\u4e2a\u56fa\u5b9a\u7684\u8f93\u5165\u5206\u8fa8\u7387&#xff08;\u6bd4\u5982 608\u00d7608&#xff09;&#xff0c;\u5728\u505a\u591a\u5c3a\u5ea6\u8bad\u7ec3\u65f6&#xff0c;\u8fd9\u4e2a\u5206\u8fa8\u7387\u8fd8\u4f1a\u5728\u4e00\u4e2a\u8303\u56f4\u5185\u968f\u673a\u53d8\u5316&#xff0c;\u597d\u8ba9\u6a21\u578b\u9002\u5e94\u4e0d\u540c\u5c3a\u5ea6\u4e0b\u7684\u76ee\u6807\u3002\u7b2c\u4e8c\u6b65\u662f\u7279\u5f81\u63d0\u53d6&#xff0c;\u56fe\u50cf\u7ecf\u8fc7 CSPDarknet53 \u9aa8\u5e72\u7f51\u7edc&#xff0c;\u5f97\u5230\u591a\u4e2a\u4e0d\u540c\u5c3a\u5ea6\u7684\u7279\u5f81\u56fe&#xff0c;\u8fd9\u4e9b\u7279\u5f81\u56fe\u4ece\u5e95\u5230\u9876\u5206\u522b\u5bf9\u5e94\u8d8a\u6765\u8d8a\u5927\u7684\u611f\u53d7\u91ce\u3001\u8d8a\u6765\u8d8a\u62bd\u8c61\u7684\u8bed\u4e49\u3002\u7b2c\u4e09\u6b65\u662f\u7279\u5f81\u878d\u5408&#xff0c;\u8fd9\u4e00\u6b65\u7531 SPP \u548c PANet \u627f\u62c5&#xff1a;SPP \u5728\u9aa8\u5e72\u7684\u67d0\u4e2a\u6df1\u5c42\u4f4d\u7f6e\u7528\u591a\u5c3a\u5bf8\u6c60\u5316\u628a\u611f\u53d7\u91ce\u8fdb\u4e00\u6b65\u6491\u5927&#xff0c;PANet \u5219\u5728\u591a\u4e2a\u5c3a\u5ea6\u4e4b\u95f4\u505a\u81ea\u4e0a\u800c\u4e0b\u3001\u518d\u81ea\u4e0b\u800c\u4e0a\u7684\u53cc\u5411\u878d\u5408&#xff0c;\u628a\u5e95\u5c42\u4f4d\u7f6e\u4fe1\u606f\u548c\u9876\u5c42\u8bed\u4e49\u4fe1\u606f\u63c9\u5230\u4e00\u5757\u3002\u7b2c\u56db\u6b65\u662f\u5bc6\u96c6\u9884\u6d4b&#xff0c;YOLOv3 \u68c0\u6d4b\u5934\u5728\u878d\u5408\u540e\u7684\u591a\u4e2a\u5c3a\u5ea6\u7279\u5f81\u56fe\u4e0a&#xff0c;\u7528\u57fa\u4e8e anchor \u7684\u65b9\u5f0f\u9884\u6d4b\u6bcf\u4e2a\u76ee\u6807\u7684\u7c7b\u522b\u3001\u7f6e\u4fe1\u5ea6\u548c\u8fb9\u754c\u6846\u5750\u6807&#xff0c;\u6700\u540e\u7ecf\u8fc7\u89e3\u7801\u548c DIoU-NMS \u540e\u5904\u7406&#xff0c;\u7b5b\u6389\u91cd\u590d\u7684\u6846&#xff0c;\u8f93\u51fa\u6700\u7ec8\u7684\u68c0\u6d4b\u7ed3\u679c\u3002<\/p>\n<p>\u8fd9\u4e48\u4e00\u68b3\u7406\u5c31\u80fd\u53d1\u73b0&#xff0c;YOLOv4 \u7684\u6bcf\u4e00\u4e2a\u521b\u65b0&#xff0c;\u90fd\u6070\u597d\u5d4c\u5728\u8fd9\u6761\u6d41\u6c34\u7ebf\u7684\u67d0\u4e2a\u73af\u8282\u4e0a&#xff1a;Mosaic \u548c\u81ea\u5bf9\u6297\u8bad\u7ec3\u4f5c\u7528\u5728\u7b2c\u4e00\u6b65\u7684\u6570\u636e\u7aef&#xff0c;CSP\u3001Mish \u4f5c\u7528\u5728\u7b2c\u4e8c\u6b65\u7684\u7279\u5f81\u63d0\u53d6\u7aef&#xff0c;SPP\u3001PAN\u3001SAM \u4f5c\u7528\u5728\u7b2c\u4e09\u6b65\u7684\u878d\u5408\u7aef&#xff0c;CIoU\u3001\u6d88\u9664\u7f51\u683c\u654f\u611f\u3001DIoU-NMS \u4f5c\u7528\u5728\u7b2c\u56db\u6b65\u7684\u9884\u6d4b\u4e0e\u540e\u5904\u7406\u7aef\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8ba4\u4e3a&#xff0c;\u53ea\u6709\u5148\u5efa\u7acb\u8fd9\u5f20\u5168\u666f\u56fe&#xff0c;\u540e\u9762\u518d\u9010\u4e2a\u770b\u7ec6\u8282&#xff0c;\u624d\u4e0d\u4f1a\u53ea\u89c1\u6811\u6728\u4e0d\u89c1\u68ee\u6797\u3002<\/p>\n<h3>\u56db\u3001\u6280\u672f\u521b\u65b0&#xff1a;\u6bcf\u4e00\u4e2a\u6539\u52a8\u90fd\u8981\u56de\u7b54&#034;\u4e3a\u4ec0\u4e48&#034;<\/h3>\n<h4>4.1 Mosaic \u6570\u636e\u589e\u5f3a&#xff1a;\u56db\u4e2a\u56fe\u62fc\u4e00\u5f20&#xff0c;\u4e0a\u4e0b\u6587\u4ece\u6b64\u4e0d\u518d\u5b64\u7acb<\/h4>\n<p>\u5148\u6765\u770b\u6570\u636e\u589e\u5f3a\u3002\u4f20\u7edf\u7684 CutMix \u662f\u628a\u4e24\u5f20\u56fe\u62fc\u5728\u4e00\u8d77&#xff0c;\u4e00\u5f20\u56fe\u7684\u5185\u5bb9\u8986\u76d6\u5230\u53e6\u4e00\u5f20\u56fe\u7684\u67d0\u4e2a\u77e9\u5f62\u533a\u57df&#xff0c;\u6807\u7b7e\u6309\u7167\u8986\u76d6\u9762\u79ef\u6765\u6298\u7b97\u3002YOLOv4 \u5728\u6b64\u57fa\u7840\u4e0a\u63d0\u51fa\u4e86 Mosaic&#xff0c;\u628a\u4e24\u5f20\u56fe\u5347\u7ea7\u6210\u4e86\u56db\u5f20\u56fe\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u89c9\u5f97&#xff0c;\u8fd9\u4e2a\u6539\u52a8\u770b\u8d77\u6765\u53ea\u662f&#034;2 \u53d8 4&#034;&#xff0c;\u80cc\u540e\u7684\u903b\u8f91\u5374\u5b8c\u5168\u4e0d\u4e00\u6837\u3002\u56db\u5f20\u56fe\u88ab\u7f29\u653e\u5230\u4e0d\u540c\u7684\u5c3a\u5ea6&#xff0c;\u7136\u540e\u62fc\u63a5\u6210\u4e00\u5f20\u5927\u56fe&#xff0c;\u610f\u5473\u7740\u5728\u8bad\u7ec3\u7684\u6bcf\u4e00\u5f20\u56fe\u91cc&#xff0c;\u7f51\u7edc\u540c\u65f6\u770b\u5230\u4e86\u56db\u79cd\u4e0d\u540c\u7684\u80cc\u666f\u4e0a\u4e0b\u6587\u3001\u56db\u79cd\u4e0d\u540c\u7684\u76ee\u6807\u5c3a\u5ea6\u3002\u4ee5\u524d\u4e00\u4e2a\u7269\u4f53\u51fa\u73b0\u5728\u5b83&#034;\u8be5\u51fa\u73b0&#034;\u7684\u5730\u65b9&#xff0c;\u7f51\u7edc\u5f88\u5bb9\u6613\u9760\u4e0a\u4e0b\u6587\u5077\u61d2&#xff1b;\u73b0\u5728\u540c\u4e00\u4e2a\u7269\u4f53\u53ef\u80fd\u88ab\u968f\u673a\u62fc\u5230\u5b8c\u5168\u964c\u751f\u7684\u73af\u5883\u91cc&#xff0c;\u7f51\u7edc\u5c31\u4e0d\u5f97\u4e0d\u771f\u6b63\u53bb\u5b66\u4e60\u7269\u4f53\u672c\u8eab\u7684\u7279\u5f81&#xff0c;\u800c\u4e0d\u662f\u80cc\u666f\u7684\u7ebf\u7d22\u3002\u8fd9\u76f4\u63a5\u63d0\u5347\u4e86\u6a21\u578b\u5bf9&#034;\u76ee\u6807\u8131\u79bb\u5e38\u89c4\u4e0a\u4e0b\u6587&#034;\u573a\u666f\u7684\u9c81\u68d2\u6027\u3002<\/p>\n<p>\u3010Figure 3&#xff1a;Mosaic \u6570\u636e\u589e\u5f3a\u793a\u4f8b\u3011<\/p>\n<p>Mosaic \u8fd8\u6709\u4e00\u4e2a\u5e38\u88ab\u5ffd\u7565\u7684\u597d\u5904&#xff0c;\u548c\u6279\u5f52\u4e00\u5316\u6709\u5173\u3002\u6279\u5f52\u4e00\u5316\u662f\u5728\u6bcf\u4e2a batch \u91cc\u7edf\u8ba1\u6fc0\u6d3b\u503c\u7684\u5747\u503c\u548c\u65b9\u5dee&#xff0c;batch \u8d8a\u5927\u7edf\u8ba1\u8d8a\u7a33\u5b9a\u3002\u4f46\u5927 batch \u9700\u8981\u5927\u663e\u5b58&#xff0c;\u5355\u5361\u8bad\u7ec3\u65f6\u5f80\u5f80\u5582\u4e0d\u8fdb\u53bb\u3002Mosaic \u4e00\u5f20\u56fe\u91cc\u88c5\u7740\u56db\u5f20\u4e0d\u540c\u56fe\u7684\u7edf\u8ba1\u4fe1\u606f&#xff0c;\u7b49\u4e8e\u7528\u4e00\u5f20\u56fe\u7684\u663e\u5b58&#xff0c;\u628a batch \u7684\u6709\u6548\u7edf\u8ba1\u8303\u56f4\u6269\u5927\u4e86\u597d\u51e0\u500d\u3002\u4f5c\u8005\u7279\u522b\u5f3a\u8c03&#xff0c;\u8fd9\u663e\u8457\u964d\u4f4e\u4e86\u5bf9\u5927 mini-batch \u7684\u4f9d\u8d56&#xff0c;\u8ba9\u5355\u5361\u8bad\u7ec3\u6210\u4e3a\u53ef\u80fd\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8ba4\u4e3a&#xff0c;\u8fd9\u4e00\u70b9\u548c\u6574\u7bc7\u8457\u4f5c&#034;\u8ba9\u666e\u901a\u4eba\u7528\u4e00\u5757\u5361\u4e5f\u80fd\u8bad\u7ec3&#034;\u7684\u76ee\u6807\u662f\u9ad8\u5ea6\u4e00\u81f4\u7684\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8fd8\u60f3\u628a Mosaic \u4e3a\u4ec0\u4e48\u5bf9\u68c0\u6d4b\u7279\u522b\u6709\u6548\u518d\u8bb2\u900f\u4e00\u5c42\u3002\u68c0\u6d4b\u548c\u5206\u7c7b\u7684\u4e00\u4e2a\u672c\u8d28\u533a\u522b\u662f&#xff0c;\u68c0\u6d4b\u8981\u540c\u65f6\u5e94\u5bf9&#034;\u76ee\u6807\u5927\u5c0f\u8de8\u5ea6\u6781\u5927&#034;\u548c&#034;\u76ee\u6807\u51fa\u73b0\u5728\u54ea\u91cc\u90fd\u5408\u7406&#034;\u8fd9\u4e24\u4ef6\u4e8b\u3002Mosaic \u7528\u56db\u5f20\u4e0d\u540c\u5c3a\u5ea6\u7684\u56fe\u62fc\u6210\u4e00\u5f20&#xff0c;\u7b49\u4e8e\u5728\u6bcf\u5f20\u8bad\u7ec3\u6837\u672c\u91cc\u90fd\u540c\u65f6\u51fa\u73b0\u4e86\u5927\u76ee\u6807\u3001\u5c0f\u76ee\u6807\u3001\u4ee5\u53ca\u5b83\u4eec\u88ab\u5b89\u653e\u5728\u964c\u751f\u80cc\u666f\u4e2d\u7684\u60c5\u51b5\u3002\u8fd9\u76f8\u5f53\u4e8e\u9690\u5f0f\u5730\u505a\u4e86\u591a\u5c3a\u5ea6\u8bad\u7ec3\u548c\u4e0a\u4e0b\u6587\u6253\u6563&#xff0c;\u4e24\u4ef6\u68c0\u6d4b\u8bad\u7ec3\u91cc\u5f88\u5403\u529b\u7684\u4e8b&#xff0c;\u88ab\u4e00\u6b21\u6570\u636e\u589e\u5f3a\u987a\u624b\u89e3\u51b3\u4e86\u3002\u4e5f\u6b63\u56e0\u5982\u6b64&#xff0c;Mosaic \u5728\u6d88\u878d\u5b9e\u9a8c\u91cc\u5e26\u6765\u7684 AP \u63d0\u5347\u662f\u76f8\u5f53\u663e\u8457\u7684&#xff0c;\u662f YOLOv4 \u4f17\u591a\u589e\u5f3a\u624b\u6bb5\u91cc\u6027\u4ef7\u6bd4\u6781\u9ad8\u7684\u4e00\u4e2a\u3002<\/p>\n<h4>4.2 Self-Adversarial Training&#xff1a;\u8ba9\u7f51\u7edc\u81ea\u5df1\u548c\u81ea\u5df1&#034;\u62ac\u6760&#034;<\/h4>\n<p>\u7b2c\u4e8c\u4e2a\u65b0\u4e1c\u897f\u53eb\u81ea\u5bf9\u6297\u8bad\u7ec3&#xff0c;\u601d\u8def\u975e\u5e38\u6709\u610f\u601d\u3002\u4f20\u7edf\u5bf9\u6297\u8bad\u7ec3\u662f\u4f60\u8bf7\u4e00\u4e2a\u989d\u5916\u7684\u5bf9\u6297\u7f51\u7edc\u6765\u653b\u51fb\u4f60\u7684\u6a21\u578b&#xff1b;YOLOv4 \u7684\u505a\u6cd5\u662f\u8ba9\u6a21\u578b\u81ea\u5df1\u653b\u51fb\u81ea\u5df1\u3002<\/p>\n<p>\u6574\u4e2a\u8fc7\u7a0b\u5206\u4e24\u4e2a\u9636\u6bb5\u3002\u7b2c\u4e00\u9636\u6bb5&#xff0c;\u7f51\u7edc\u6b63\u5e38\u524d\u5411\u4f20\u64ad&#xff0c;\u4f46\u53cd\u5411\u4f20\u64ad\u65f6\u66f4\u65b0\u7684\u662f\u8f93\u5165\u56fe\u50cf&#xff0c;\u800c\u4e0d\u662f\u7f51\u7edc\u6743\u91cd\u3002\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u7f51\u7edc\u4f1a\u53bb&#034;\u4fee\u6539&#034;\u539f\u59cb\u56fe\u50cf&#xff0c;\u6539\u5230\u8ba9\u6a21\u578b\u81ea\u5df1\u90fd\u8ba4\u4e0d\u51fa\u4e0a\u9762\u6709\u76ee\u6807\u4e3a\u6b62\u2014\u2014\u76f8\u5f53\u4e8e\u7f51\u7edc\u7ed9\u81ea\u5df1\u8bbe\u4e86\u4e00\u4e2a\u9a97\u5c40&#xff0c;\u628a\u56fe\u6539\u6210&#034;\u770b\u8d77\u6765\u6839\u672c\u6ca1\u6709\u68c0\u6d4b\u5bf9\u8c61&#034;\u7684\u6837\u5b50\u3002\u7b2c\u4e8c\u9636\u6bb5&#xff0c;\u7f51\u7edc\u518d\u62ff\u8fd9\u5f20\u88ab\u6539\u8fc7\u7684\u56fe&#xff0c;\u7528\u6b63\u5e38\u7684\u65b9\u5f0f\u53bb\u5b66\u4e60\u68c0\u6d4b\u76ee\u6807\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u7528\u5927\u767d\u8bdd\u7ffb\u8bd1\u4e00\u4e0b&#xff1a;\u7b2c\u4e00\u904d\u8ba9\u7f51\u7edc\u4f7f\u52b2&#034;\u85cf\u732b\u732b&#034;&#xff0c;\u628a\u76ee\u6807\u85cf\u5230\u6781\u96be\u88ab\u53d1\u73b0&#xff1b;\u7b2c\u4e8c\u904d\u518d\u8ba9\u7f51\u7edc\u52aa\u529b&#034;\u627e\u732b\u732b&#034;&#xff0c;\u5728\u8fd9\u4e48\u5201\u94bb\u7684\u56fe\u4e0a\u628a\u5b83\u627e\u51fa\u6765\u3002\u8fd9\u6837\u8bad\u7ec3\u51fa\u6765\u7684\u6a21\u578b&#xff0c;\u5bf9\u906e\u6321\u3001\u6b8b\u7f3a\u3001\u80cc\u666f\u5e72\u6270\u7684\u62b5\u6297\u529b\u4f1a\u5f3a\u5f88\u591a\u3002\u5b83\u548c Mosaic \u4e00\u6b63\u4e00\u53cd&#xff0c;\u4e00\u4e2a\u9760\u6269\u5927\u4e0a\u4e0b\u6587\u591a\u6837\u6027&#xff0c;\u4e00\u4e2a\u9760\u5236\u9020\u6700\u96be\u573a\u666f&#xff0c;\u5171\u540c\u628a\u6a21\u578b\u7684\u6cdb\u5316\u80fd\u529b\u5f80\u4e0a\u9876\u3002<\/p>\n<h4>4.3 Cross mini-Batch Normalization&#xff1a;\u628a\u5f52\u4e00\u5316\u7684\u7edf\u8ba1\u8303\u56f4\u73a9\u660e\u767d<\/h4>\n<p>\u6279\u5f52\u4e00\u5316&#xff08;BN&#xff09;\u662f\u8ba9\u6df1\u5c42\u7f51\u7edc\u7a33\u5b9a\u8bad\u7ec3\u7684\u57fa\u77f3&#xff0c;\u4f46\u5b83\u6709\u4e2a\u8001\u6bdb\u75c5&#xff1a;\u5bf9 batch size \u5f88\u654f\u611f\u3002batch \u5c0f\u4e86&#xff0c;\u7edf\u8ba1\u51fa\u6765\u7684\u5747\u503c\u548c\u65b9\u5dee\u6ce2\u52a8\u5927&#xff0c;\u8bad\u7ec3\u4e0d\u7a33\u3002\u5355\u5361\u8bad\u7ec3\u6070\u6070\u6700\u5bb9\u6613\u9047\u5230\u5c0f batch \u7684\u56f0\u5883\u3002<\/p>\n<p>\u4f5c\u8005\u4e3a\u6b64\u6539\u9020\u4e86\u4e24\u79cd\u5df2\u6709\u7684\u5f52\u4e00\u5316\u65b9\u6cd5\u3002\u5148\u8bf4 CBN&#xff08;\u8de8\u8fed\u4ee3\u6279\u5f52\u4e00\u5316&#xff09;&#xff0c;\u5b83\u628a\u7edf\u8ba1\u8303\u56f4\u4ece&#034;\u5f53\u524d\u8fd9\u4e2a batch&#034;\u6269\u5c55\u5230\u4e86&#034;\u8fc7\u53bb\u51e0\u6b21\u8fed\u4ee3&#034;&#xff0c;\u76f8\u5f53\u4e8e\u501f\u7528\u4e86\u5386\u53f2\u8fed\u4ee3\u7684\u7edf\u8ba1\u4fe1\u606f&#xff0c;\u8fd9\u6837\u5373\u4fbf\u5355\u6b21 batch \u5f88\u5c0f&#xff0c;\u7edf\u8ba1\u91cf\u4e5f\u80fd\u8db3\u591f\u7a33\u5b9a\u3002\u4f46 CBN \u6709\u4e2a\u9690\u60a3&#xff1a;\u5b83\u8de8\u7684\u662f\u591a\u6b21\u8fed\u4ee3&#xff0c;\u800c\u6bcf\u6b21\u8fed\u4ee3\u540e\u6743\u91cd\u90fd\u5728\u53d8&#xff0c;\u7528\u65e7\u6743\u91cd\u7b97\u51fa\u6765\u7684\u7edf\u8ba1\u91cf\u53bb\u5f52\u4e00\u5316\u65b0\u6743\u91cd\u4e0b\u7684\u6fc0\u6d3b&#xff0c;\u591a\u5c11\u6709\u70b9&#034;\u5f20\u51a0\u674e\u6234&#034;\u3002<\/p>\n<p>YOLOv4 \u7684\u505a\u6cd5\u662f\u6298\u4e2d\u2014\u2014CmBN&#xff0c;\u628a\u8de8\u8fed\u4ee3\u7684\u8303\u56f4\u9650\u5236\u5728\u4e00\u4e2a batch \u5185\u90e8\u7684\u51e0\u4e2a mini-batch \u4e4b\u95f4\u3002\u8fd9\u6837\u65e2\u501f\u5230\u4e86\u66f4\u591a\u6837\u672c\u7684\u7edf\u8ba1\u4fe1\u606f&#xff0c;\u53c8\u4e0d\u4f1a\u8de8\u51fa\u5f53\u524d\u6743\u91cd\u6709\u6548\u7684\u8303\u56f4&#xff0c;\u7b97\u662f\u5728&#034;\u7edf\u8ba1\u66f4\u7a33&#034;\u548c&#034;\u6743\u91cd\u4e0d\u5931\u914d&#034;\u4e4b\u95f4\u627e\u5230\u4e86\u4e00\u4e2a\u5e73\u8861\u70b9\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8ba4\u4e3a&#xff0c;\u8fd9\u4e2a\u7ec6\u8282\u6070\u6070\u662f\u5355\u5361\u8bad\u7ec3\u80fd\u5426\u6210\u529f\u7684\u547d\u95e8\u4e4b\u4e00&#xff0c;\u56e0\u4e3a\u5b83\u76f4\u63a5\u51b3\u5b9a\u4e86\u4f60\u5728\u5355\u5361\u3001\u5c0f batch \u7684\u6761\u4ef6\u4e0b&#xff0c;\u7f51\u7edc\u8fd8\u80fd\u4e0d\u80fd\u7a33\u5b9a\u6536\u655b\u3002<\/p>\n<p>\u3010Figure 4&#xff1a;Cross mini-Batch Normalization&#xff08;BN \/ CBN \/ CmBN \u6d41\u7a0b\u5bf9\u6bd4&#xff09;\u3011<\/p>\n<h4>4.4 Mish \u6fc0\u6d3b\u51fd\u6570&#xff1a;\u5e73\u6ed1\u3001\u975e\u5355\u8c03\u3001\u8d1f\u533a\u95f4\u4e0d&#034;\u4e00\u5200\u5207&#034;<\/h4>\n<p>\u6fc0\u6d3b\u51fd\u6570\u7684\u9009\u62e9\u770b\u4f3c\u4e0d\u8d77\u773c&#xff0c;\u5b9e\u9645\u5f71\u54cd\u5f88\u5927\u3002YOLOv3 \u7528\u7684\u662f leaky ReLU&#xff0c;\u8d1f\u533a\u95f4\u7ed9\u4e00\u4e2a\u5f88\u5c0f\u7684\u659c\u7387&#xff0c;\u907f\u514d\u68af\u5ea6\u5b8c\u5168\u6d88\u5931&#xff0c;\u4f46\u5b83\u5728\u96f6\u70b9\u5904\u4e0d\u8fde\u7eed\u3001\u8d1f\u533a\u95f4\u662f\u76f4\u7ebf&#xff0c;\u8868\u8fbe\u80fd\u529b\u6709\u9650\u3002YOLOv4 \u6362\u6210\u4e86 Mish\u3002<\/p>\n<p>Mish \u7684\u6570\u5b66\u5f62\u5f0f\u662f x\u00b7tanh(softplus(x))&#xff0c;\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u4e0d\u6253\u7b97\u5728\u8fd9\u91cc\u5806\u516c\u5f0f&#xff0c;\u53ea\u8bb2\u5b83\u4e09\u4e2a\u5173\u952e\u6027\u8d28\u3002\u7b2c\u4e00&#xff0c;\u5b83\u5728\u8d1f\u533a\u95f4\u4e0d\u662f\u7b80\u5355\u7684\u4e00\u6761\u76f4\u7ebf&#xff0c;\u800c\u662f\u4fdd\u7559\u4e86\u4e00\u90e8\u5206\u8d1f\u503c\u5e76\u5e73\u6ed1\u5730\u8fc7\u6e21&#xff0c;\u8fd9\u8ba9\u68af\u5ea6\u5728\u8d1f\u534a\u8f74\u4e5f\u6709\u4fe1\u606f\u6d41\u52a8&#xff0c;\u7f13\u89e3\u4e86 ReLU \u4e00\u65cf\u5728\u8d1f\u533a\u95f4\u7684&#034;\u795e\u7ecf\u5143\u6b7b\u4ea1&#034;\u95ee\u9898\u3002\u7b2c\u4e8c&#xff0c;\u5b83\u662f\u975e\u5355\u8c03\u7684&#xff0c;\u4e5f\u5c31\u662f\u8bf4\u8f93\u51fa\u503c\u5728\u5c40\u90e8\u4f1a\u5148\u964d\u518d\u5347&#xff0c;\u8fd9\u79cd\u975e\u5355\u8c03\u6027\u8ba9\u5b83\u5728\u67d0\u4e9b\u6df1\u5c42\u7f51\u7edc\u91cc\u6bd4\u5355\u8c03\u6fc0\u6d3b\u66f4\u5bb9\u6613\u4f20\u64ad\u68af\u5ea6\u3002\u7b2c\u4e09&#xff0c;\u5b83\u662f\u5904\u5904\u8fde\u7eed\u53ef\u5bfc\u7684&#xff0c;\u8bad\u7ec3\u8fc7\u7a0b\u66f4\u5e73\u6ed1&#xff0c;\u4e0d\u5bb9\u6613\u51fa\u73b0\u68af\u5ea6\u5267\u70c8\u8df3\u53d8\u3002<\/p>\n<p>\u5f53\u7136&#xff0c;\u4f5c\u8005\u4e5f\u505a\u4e86\u4e25\u683c\u7684\u5bf9\u6bd4\u5b9e\u9a8c&#xff0c;Mish \u5bf9\u68c0\u6d4b\u5668\u7684\u63d0\u5347\u662f\u5728 MS COCO \u4e0a\u5b9e\u6d4b\u51fa\u6765\u7684&#xff0c;\u4e0d\u662f\u62cd\u8111\u888b\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u60f3\u5f3a\u8c03\u7684\u662f&#xff0c;\u6fc0\u6d3b\u51fd\u6570\u8fd9\u79cd&#034;\u4e00\u4e2a\u51fd\u6570\u6362\u53e6\u4e00\u4e2a\u51fd\u6570&#034;\u7684\u5c0f\u6539\u52a8&#xff0c;\u5f80\u5f80\u662f\u6295\u5165\u4ea7\u51fa\u6bd4\u6700\u9ad8\u7684\u4f18\u5316&#xff0c;\u56e0\u4e3a\u5b83\u7684\u6210\u672c\u51e0\u4e4e\u4e3a\u96f6&#xff0c;\u5374\u80fd\u5b9e\u5b9e\u5728\u5728\u5730\u6539\u5584\u68af\u5ea6\u7684\u4f20\u64ad\u8d28\u91cf\u3002<\/p>\n<h4>4.5 CIoU \u635f\u5931&#xff1a;\u8fb9\u754c\u6846\u56de\u5f52\u4ece&#034;\u5404\u7ba1\u5404\u7684&#034;\u5230&#034;\u6574\u4f53\u5efa\u6a21&#034;<\/h4>\n<p>\u8fb9\u754c\u6846\u56de\u5f52\u7684\u635f\u5931\u51fd\u6570&#xff0c;\u662f\u6574\u7bc7\u8457\u4f5c\u91cc\u6280\u672f\u542b\u91d1\u91cf\u5f88\u9ad8\u7684\u90e8\u5206\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u5e26\u5927\u5bb6\u56de\u987e\u4e00\u4e0b\u6f14\u53d8\u8fc7\u7a0b\u3002<\/p>\n<p>\u6700\u65e9\u7684\u68c0\u6d4b\u5668\u7528 MSE \u76f4\u63a5\u56de\u5f52\u6846\u7684\u4e2d\u5fc3\u5750\u6807\u3001\u5bbd\u548c\u9ad8\u3002\u95ee\u9898\u5728\u4e8e&#xff0c;\u8fd9\u56db\u4e2a\u91cf\u662f\u5272\u88c2\u7684&#xff0c;\u7f51\u7edc\u5206\u522b\u53bb\u62df\u5408\u5b83\u4eec&#xff0c;\u5e76\u6ca1\u6709\u628a&#034;\u6846\u7684\u6574\u4f53\u5f62\u72b6&#034;\u5f53\u6210\u4e00\u4e2a\u6574\u4f53\u6765\u8003\u8651&#xff1b;\u800c\u4e14 MSE \u5bf9\u5c3a\u5ea6\u654f\u611f&#xff0c;\u5927\u6846\u548c\u5c0f\u6846\u540c\u6837\u7684\u50cf\u7d20\u8bef\u5dee&#xff0c;\u5bf9\u5e94\u7684\u76f8\u5bf9\u8bef\u5dee\u5b8c\u5168\u4e0d\u4e00\u6837\u3002\u4e8e\u662f\u6709\u4e86 IoU \u635f\u5931&#xff0c;\u76f4\u63a5\u7528\u9884\u6d4b\u6846\u548c\u771f\u503c\u6846\u7684\u4ea4\u5e76\u6bd4\u6765\u5ea6\u91cf&#xff0c;\u5929\u7136\u5bf9\u5c3a\u5ea6\u4e0d\u654f\u611f\u3002\u4f46 IoU \u6709\u4e2a\u7f3a\u9677&#xff1a;\u4e24\u4e2a\u6846\u5982\u679c\u6ca1\u6709\u4ea4\u96c6&#xff0c;IoU \u6052\u4e3a 0&#xff0c;\u68af\u5ea6\u76f4\u63a5\u6d88\u5931&#xff0c;\u7f51\u7edc\u5b66\u4e0d\u52a8\u3002<\/p>\n<p>\u63a5\u7740\u662f GIoU&#xff0c;\u5b83\u989d\u5916\u5f15\u5165\u4e00\u4e2a\u80fd\u540c\u65f6\u7f69\u4f4f\u4e24\u4e2a\u6846\u7684\u6700\u5c0f\u5916\u63a5\u6846&#xff0c;\u7528\u8fd9\u4e2a\u5916\u63a5\u6846\u7684\u9762\u79ef\u6765&#034;\u515c\u5e95&#034;&#xff0c;\u8ba9\u65e0\u4ea4\u96c6\u7684\u6846\u4e5f\u6709\u68af\u5ea6\u3002\u518d\u5f80\u540e\u662f DIoU&#xff0c;\u5b83\u5728 IoU \u7684\u57fa\u7840\u4e0a\u8003\u8651\u4e86\u4e2d\u5fc3\u70b9\u4e4b\u95f4\u7684\u8ddd\u79bb&#xff0c;\u628a&#034;\u4e24\u4e2a\u6846\u4e2d\u5fc3\u8d34\u4e0d\u8d34\u5f97\u8fd1&#034;\u4e5f\u7eb3\u5165\u8003\u91cf\u3002\u800c YOLOv4 \u7528\u7684 CIoU&#xff0c;\u5219\u662f\u628a\u8fd9\u4e9b\u7ef4\u5ea6\u4e00\u6b21\u6536\u9f50&#xff1a;\u65e2\u770b\u91cd\u53e0\u9762\u79ef&#xff0c;\u53c8\u770b\u4e2d\u5fc3\u70b9\u8ddd\u79bb&#xff0c;\u8fd8\u770b\u957f\u5bbd\u6bd4\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u60f3\u6307\u51fa\u7684\u662f&#xff0c;CIoU \u7684\u4ef7\u503c\u5728\u4e8e\u5b83\u628a&#034;\u6846\u56de\u5f52&#034;\u4ece\u4e00\u4e2a\u5750\u6807\u62df\u5408\u95ee\u9898&#xff0c;\u91cd\u65b0\u7406\u89e3\u6210\u4e00\u4e2a\u5173\u4e8e&#034;\u4e24\u4e2a\u77e9\u5f62\u6709\u591a\u50cf&#034;\u7684\u51e0\u4f55\u95ee\u9898\u3002\u91cd\u53e0\u9762\u79ef\u53cd\u6620\u4f4d\u7f6e\u91cd\u5408\u5ea6&#xff0c;\u4e2d\u5fc3\u8ddd\u79bb\u53cd\u6620\u504f\u79fb\u7a0b\u5ea6&#xff0c;\u957f\u5bbd\u6bd4\u53cd\u6620\u5f62\u72b6\u76f8\u4f3c\u5ea6&#xff0c;\u4e09\u4e2a\u7ef4\u5ea6\u5408\u5728\u4e00\u8d77&#xff0c;\u7f51\u7edc\u5bf9\u8fb9\u754c\u6846\u7684\u56de\u5f52\u5c31\u6709\u4e86\u66f4\u5b8c\u6574\u7684\u76d1\u7763\u4fe1\u53f7&#xff0c;\u6536\u655b\u66f4\u5feb\u3001\u5b9a\u4f4d\u66f4\u51c6\u3002\u8fd9\u4e2a\u6539\u52a8\u76f4\u63a5\u4f53\u73b0\u5728\u6d88\u878d\u5b9e\u9a8c\u91cc&#xff1a;\u5728\u76f8\u540c\u914d\u7f6e\u4e0b&#xff0c;CIoU \u7684 AP \u660e\u663e\u9ad8\u4e8e\u7528 MSE\u3001GIoU \u6216 DIoU \u7684\u7248\u672c\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u518d\u5f80\u6df1\u91cc\u8bf4\u4e00\u5c42\u3002\u7528 MSE \u505a\u6846\u56de\u5f52\u65f6&#xff0c;\u56db\u4e2a\u5750\u6807\u88ab\u5f53\u6210\u56db\u4e2a\u72ec\u7acb\u53d8\u91cf\u6765\u62df\u5408&#xff0c;\u7f51\u7edc\u6839\u672c\u4e0d\u77e5\u9053&#034;\u6846\u662f\u4e00\u4e2a\u6574\u4f53&#034;&#xff1b;\u800c IoU \u5bb6\u65cf\u628a\u5ea6\u91cf\u6362\u6210\u51e0\u4f55\u76f8\u4f3c\u5ea6\u4e4b\u540e&#xff0c;\u68af\u5ea6\u4fe1\u53f7\u548c&#034;\u6846\u4e0e\u6846\u7684\u8d34\u5408\u7a0b\u5ea6&#034;\u76f4\u63a5\u6302\u94a9&#xff0c;\u8bad\u7ec3\u76ee\u6807\u66f4\u8d34\u8fd1\u68c0\u6d4b\u7684\u6700\u7ec8\u8bc4\u5224\u6807\u51c6\u3002\u5230\u4e86 CIoU&#xff0c;\u53c8\u989d\u5916\u5904\u7406\u4e86 GIoU \u548c DIoU \u5404\u81ea\u7167\u987e\u4e0d\u5230\u7684\u77ed\u677f&#xff1a;GIoU \u5728\u6846\u4e92\u76f8\u5305\u542b\u65f6\u9000\u5316\u4e3a IoU&#xff0c;\u5931\u53bb\u533a\u5206\u5ea6&#xff1b;DIoU \u6ca1\u8003\u8651\u957f\u5bbd\u6bd4&#xff0c;\u5f62\u72b6\u4e0d\u5339\u914d\u65f6\u6536\u655b\u4e0d\u591f\u5145\u5206\u3002CIoU \u628a\u8fd9\u4e09\u4e2a\u56e0\u5b50\u7528\u5408\u7406\u7684\u6743\u91cd\u6574\u5408\u8fdb\u540c\u4e00\u4e2a\u635f\u5931\u91cc&#xff0c;\u8ba9\u6bcf\u4e00\u79cd\u6846\u7684\u9519\u4f4d\u65b9\u5f0f\u90fd\u6709\u5bf9\u5e94\u7684\u68af\u5ea6\u53bb\u7ea0\u6b63\u3002\u8fd9\u4e5f\u63d0\u9192\u6211\u4eec&#xff0c;\u8fb9\u754c\u6846\u56de\u5f52\u7684\u5173\u952e\u4e0d\u662f\u5806\u53e0\u6307\u6807&#xff0c;\u800c\u662f\u8ba9\u6bcf\u4e2a\u88ab\u91cf\u5316\u7684\u7ef4\u5ea6\u90fd\u80fd\u8f6c\u5316\u6210\u6709\u6548\u7684\u5b66\u4e60\u4fe1\u53f7\u3002<\/p>\n<h4>4.6 \u6d88\u9664\u7f51\u683c\u654f\u611f\u6027&#xff1a;\u5750\u6807\u89e3\u7801\u91cc\u7684\u5c0f\u673a\u5173<\/h4>\n<p>\u8fd9\u4e2a\u521b\u65b0\u540d\u5b57\u542c\u7740\u6666\u6da9&#xff0c;\u9053\u7406\u5374\u5f88\u7b80\u5355&#xff0c;\u662f\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u7279\u522b\u60f3\u8ddf\u5927\u5bb6\u5206\u4eab\u7684\u4e00\u4e2a&#034;\u5de5\u7a0b\u667a\u6167&#034;\u3002<\/p>\n<p>YOLOv3 \u9884\u6d4b\u76ee\u6807\u4e2d\u5fc3\u65f6&#xff0c;\u662f\u7528 sigmoid \u628a\u8f93\u51fa\u538b\u5230 0 \u5230 1 \u4e4b\u95f4&#xff0c;\u7136\u540e\u52a0\u4e0a\u7f51\u683c\u7684\u6574\u6570\u504f\u79fb\u3002\u95ee\u9898\u6765\u4e86&#xff1a;sigmoid \u5728 0 \u548c 1 \u9644\u8fd1\u975e\u5e38&#034;\u949d&#034;&#xff0c;\u9700\u8981\u7f51\u7edc\u8f93\u51fa\u4e00\u4e2a\u7edd\u5bf9\u503c\u6781\u5927\u7684\u6570&#xff0c;\u624d\u80fd\u8ba9 sigmoid \u7684\u7ed3\u679c\u771f\u6b63\u903c\u8fd1 0 \u6216 1\u3002\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5f53\u76ee\u6807\u7684\u4e2d\u5fc3\u6070\u597d\u843d\u5728\u7f51\u683c\u8fb9\u7f18\u65f6&#xff0c;\u7f51\u7edc\u8981\u975e\u5e38\u52aa\u529b\u624d\u80fd\u8868\u8fbe\u51fa&#034;\u4e2d\u5fc3\u5c31\u5728\u8fb9\u754c\u4e0a&#034;\u8fd9\u4e2a\u4e8b\u5b9e&#xff0c;\u8bad\u7ec3\u8d77\u6765\u5f88\u5403\u529b\u3002<\/p>\n<p>YOLOv4 \u7684\u89e3\u6cd5\u6734\u7d20\u800c\u6709\u6548&#xff1a;\u7ed9 sigmoid \u7684\u8f93\u51fa\u4e58\u4e0a\u4e00\u4e2a\u5927\u4e8e 1 \u7684\u7cfb\u6570&#xff0c;\u8ba9\u5b83\u5728 0 \u548c 1 \u9644\u8fd1\u53d8\u5f97&#034;\u7075\u654f&#034;\u4e00\u4e9b&#xff0c;\u7f51\u7edc\u4e0d\u7528\u518d\u8f93\u51fa\u5de8\u5927\u7684\u503c\u5c31\u80fd\u8868\u8fbe\u8fb9\u7f18\u4f4d\u7f6e\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8ba4\u4e3a&#xff0c;\u8fd9\u79cd\u6539\u52a8\u7684\u7f8e\u5999\u4e4b\u5904\u5728\u4e8e&#xff0c;\u5b83\u6ca1\u6709\u6539\u53d8\u4efb\u4f55\u7f51\u7edc\u7ed3\u6784&#xff0c;\u53ea\u6539\u4e86\u89e3\u7801\u516c\u5f0f\u91cc\u7684\u4e00\u4e2a\u7cfb\u6570&#xff0c;\u5374\u5b9e\u5b9e\u5728\u5728\u5730\u7f13\u89e3\u4e86\u7f51\u683c\u8fb9\u754c\u5904\u7684\u5b9a\u4f4d\u56f0\u96be\u3002\u800c\u4e14\u8fd9\u4e2a\u6539\u52a8\u548c IoU \u9608\u503c\u3001\u591a anchor 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\u628a\u5b83\u7528\u5728\u4e86\u9aa8\u5e72\u7f51\u7edc\u4e0a\u3002\u5b83\u7684\u6838\u5fc3\u76ee\u7684&#xff0c;\u662f\u89e3\u51b3\u6df1\u5c42\u7f51\u7edc\u91cc\u4e00\u4e2a\u9690\u853d\u7684\u6d6a\u8d39\u95ee\u9898\u3002<\/p>\n<p>\u5728\u4f20\u7edf\u6b8b\u5dee\u7f51\u7edc\u4e2d&#xff0c;\u6bcf\u4e00\u5c42\u90fd\u4f1a\u4ea7\u751f\u5927\u91cf\u7279\u5f81&#xff0c;\u800c\u8fd9\u4e9b\u7279\u5f81\u91cc\u6709\u76f8\u5f53\u4e00\u90e8\u5206\u662f\u5197\u4f59\u7684\u2014\u2014\u5f88\u591a\u68af\u5ea6\u4fe1\u606f\u88ab\u53cd\u590d\u590d\u5236\u3001\u642c\u8fd0&#xff0c;\u5bfc\u81f4\u8ba1\u7b97\u91cf\u865a\u9ad8\u3002CSP 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\u90a3\u79cd\u628a\u7279\u5f81\u56fe\u538b\u6210\u4e00\u7ef4\u5411\u91cf\u7684\u505a\u6cd5&#xff08;\u90a3\u4f1a\u7834\u574f\u7a7a\u95f4\u4fe1\u606f&#xff0c;\u65e0\u6cd5\u7528\u4e8e\u5168\u5377\u79ef\u68c0\u6d4b\u7f51\u7edc&#xff09;&#xff0c;\u800c\u662f\u6cbf\u7528 YOLOv3 \u91cc\u6539\u8fdb\u8fc7\u7684\u7248\u672c&#xff1a;\u7528 1\u00d71\u30015\u00d75\u30019\u00d79\u300113\u00d713 \u56db\u4e2a\u4e0d\u540c\u5c3a\u5bf8\u7684\u6c60\u5316\u6838\u5e76\u884c\u505a\u6700\u5927\u6c60\u5316&#xff0c;\u518d\u62fc\u63a5\u8d77\u6765\u3002\u8fd9\u6837\u4e00\u6b21\u64cd\u4f5c\u5c31\u628a\u591a\u5c3a\u5ea6\u7684\u611f\u53d7\u91ce\u90fd\u7eb3\u5165\u4e86\u8fdb\u6765&#xff0c;\u80fd\u663e\u8457\u6269\u5927\u9aa8\u5e72\u7279\u5f81\u7684\u6709\u6548\u611f\u53d7\u91ce&#xff0c;\u5374\u51e0\u4e4e\u4e0d\u589e\u52a0\u8ba1\u7b97\u91cf\u3002<\/p>\n<p>\u518d\u770b PAN\u3002\u539f\u7248 PANet \u5728\u505a\u8de8\u5c42\u7279\u5f81\u878d\u5408\u65f6&#xff0c;\u7528\u7684\u662f\u9010\u5143\u7d20\u76f8\u52a0&#xff08;addition&#xff09;\u3002YOLOv4 \u628a\u5b83\u6539\u6210\u4e86\u901a\u9053\u62fc\u63a5&#xff08;concatenation&#xff09;\u3002\u4e3a\u4ec0\u4e48&#xff1f;\u56e0\u4e3a\u76f8\u52a0\u662f&#034;\u628a\u4e24\u4e2a\u7279\u5f81\u7684\u4fe1\u606f\u538b\u5728\u4e00\u8d77&#034;&#xff0c;\u4f1a\u6709\u4fe1\u606f\u635f\u5931&#xff1b;\u800c\u62fc\u63a5\u662f&#034;\u5e76\u6392\u53e0\u8d77\u6765&#034;&#xff0c;\u6bcf\u4e00\u8def\u7684\u7279\u5f81\u90fd\u88ab\u5b8c\u6574\u4fdd\u7559\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u8ba4\u4e3a&#xff0c;\u5728\u68c0\u6d4b\u4efb\u52a1\u91cc&#xff0c;\u5e95\u5c42\u4f4d\u7f6e\u4fe1\u606f\u548c\u9876\u5c42\u8bed\u4e49\u4fe1\u606f\u90fd\u5f88\u73cd\u8d35&#xff0c;\u7528\u62fc\u63a5\u80fd\u8ba9\u540e\u7eed\u7684\u5377\u79ef\u5c42\u6709\u66f4\u5b8c\u6574\u7684\u539f\u6599\u53bb\u5b66\u4e60\u878d\u5408\u65b9\u5f0f&#xff0c;\u800c\u4e0d\u662f\u63d0\u524d\u66ff\u5b83\u505a\u51b3\u5b9a\u3002<\/p>\n<p>\u6700\u540e\u662f SAM\u3002\u539f\u7248 SAM \u5148\u7528\u6700\u5927\u6c60\u5316\u548c\u5e73\u5747\u6c60\u5316\u628a\u7a7a\u95f4\u4fe1\u606f\u538b\u7f29&#xff0c;\u518d\u901a\u8fc7\u5377\u79ef\u548c sigmoid \u5f97\u5230\u6ce8\u610f\u529b\u6743\u91cd\u3002YOLOv4 \u628a\u5b83\u4ece&#034;\u7a7a\u95f4\u6ce8\u610f\u529b&#034;\u6539\u6210\u4e86&#034;\u9010\u70b9\u6ce8\u610f\u529b&#034;&#xff1a;\u76f4\u63a5\u5bf9\u7279\u5f81\u56fe\u505a\u5377\u79ef\u5f97\u5230\u6743\u91cd&#xff0c;\u7701\u6389\u4e86\u6c60\u5316\u6b65\u9aa4\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904&#xff0c;\u4e00\u662f\u4fdd\u7559\u4e86\u66f4\u7ec6\u7c92\u5ea6\u7684\u7a7a\u95f4\u4fe1\u606f&#xff0c;\u4e8c\u662f\u5b9e\u73b0\u66f4\u7b80\u5355\u3001\u63a8\u7406\u66f4\u5feb\u3002\u8fd9\u51e0\u5904\u6539\u9020\u5355\u72ec\u770b\u90fd\u4e0d\u5927&#xff0c;\u4f46\u5408\u5728\u4e00\u8d77&#xff0c;\u6b63\u662f&#034;\u7279\u60e0\u5305&#034;\u7684\u7cbe\u9ad3\u2014\u2014\u7528\u6781\u5c0f\u7684\u63a8\u7406\u4ee3\u4ef7&#xff0c;\u6362\u5b9e\u5b9e\u5728\u5728\u7684\u7cbe\u5ea6\u63d0\u5347\u3002<\/p>\n<p>\u3010Figure 5&#xff1a;\u6539\u8fdb\u7684 SAM \u6a21\u5757&#xff08;a&#xff09;\u539f\u7248 SAM &#xff08;b&#xff09;YOLOv4 \u6539\u8fdb\u7248\u3011<\/p>\n<p>\u3010Figure 6&#xff1a;\u6539\u8fdb\u7684 PAN \u6a21\u5757&#xff08;a&#xff09;\u539f\u7248 PAN \u76f8\u52a0\u878d\u5408 &#xff08;b&#xff09;YOLOv4 \u62fc\u63a5\u878d\u5408\u3011<\/p>\n<h4>4.9 \u9057\u4f20\u7b97\u6cd5\u9009\u8d85\u53c2\u6570&#xff1a;\u628a&#034;\u8c03\u53c2&#034;\u4e5f\u53d8\u6210\u81ea\u52a8\u5316<\/h4>\n<p>\u6700\u540e\u4e00\u4e2a\u521b\u65b0\u70b9&#xff0c;\u662f\u4f5c\u8005\u7528\u9057\u4f20\u7b97\u6cd5\u6765\u81ea\u52a8\u641c\u7d22\u6700\u4f18\u8d85\u53c2\u6570\u3002\u4ed6\u4eec\u7528 YOLOv3-SPP \u5f53\u641c\u7d22\u8f7d\u4f53&#xff0c;\u5728\u9a8c\u8bc1\u96c6\u4e0a\u8dd1\u4e86 300 \u8f6e&#xff0c;\u7528\u9057\u4f20\u7b97\u6cd5\u641c\u51fa\u4e86\u5b66\u4e60\u7387\u3001\u52a8\u91cf\u3001IoU \u9608\u503c\u3001\u635f\u5931\u5f52\u4e00\u5316\u7cfb\u6570\u7b49\u4e00\u7ec4\u8f83\u4f18\u7684\u53d6\u503c&#xff0c;\u6bd4\u5982\u5b66\u4e60\u7387 0.00261\u3001\u52a8\u91cf 0.949 \u8fd9\u4e9b\u3002<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u60f3\u5f3a\u8c03\u7684\u662f&#xff0c;\u8fd9\u4ef6\u4e8b\u7684\u4ef7\u503c\u5728\u4e8e&#034;\u53ef\u590d\u73b0&#034;\u3002\u5f88\u591a\u8457\u4f5c\u7684\u8d85\u53c2\u6570\u90fd\u662f\u624b\u5de5\u8c03\u51fa\u6765\u7684&#xff0c;\u522b\u4eba\u5f88\u96be\u7167\u642c\u3002\u4f5c\u8005\u628a\u8c03\u53c2\u8fc7\u7a0b\u7528\u9057\u4f20\u7b97\u6cd5\u56fa\u5316\u6210\u4e86\u4e00\u5957\u6d41\u7a0b&#xff0c;\u8ba9\u666e\u901a\u7528\u6237\u4e5f\u80fd\u590d\u73b0\u51fa\u63a5\u8fd1\u8457\u4f5c\u7684\u6027\u80fd\u3002\u8fd9\u518d\u6b21\u547c\u5e94\u4e86\u6574\u7bc7\u8457\u4f5c\u7684\u4e00\u8d2f\u76ee\u6807\u2014\u2014\u964d\u4f4e\u95e8\u69db&#xff0c;\u8ba9\u6bcf\u4e2a\u4eba\u90fd\u7528\u5f97\u8d77\u3001\u8bad\u5f97\u51fa\u3002<\/p>\n<p>\u5230\u8fd9\u91cc&#xff0c;YOLOv4 \u7684\u6838\u5fc3\u521b\u65b0\u5c31\u90fd\u8fc7\u4e86\u4e00\u904d\u3002\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u628a\u5b83\u4eec\u653e\u5728\u4e00\u8d77&#xff0c;\u7ed9\u8bfb\u8005\u68b3\u7406\u6210\u4e00\u5f20&#034;\u4e3a\u4e86\u4ec0\u4e48\u3001\u505a\u4e86\u4ec0\u4e48\u3001\u89e3\u51b3\u4ec0\u4e48&#034;\u7684\u5bf9\u7167\u5173\u7cfb&#xff1a;<\/p>\n<ul>\n<li>Mosaic \u4e0e SAT&#xff1a;\u89e3\u51b3\u6570\u636e\u591a\u6837\u6027\u4e0d\u8db3\u4e0e\u76ee\u6807\u8131\u79bb\u4e0a\u4e0b\u6587\u7684\u95ee\u9898&#xff0c;\u6491\u8d77\u6cdb\u5316\u80fd\u529b&#xff1b;<\/li>\n<li>CmBN&#xff1a;\u89e3\u51b3\u5355\u5361\u5c0f batch \u4e0b\u5f52\u4e00\u5316\u7edf\u8ba1\u4e0d\u7a33\u7684\u95ee\u9898&#xff0c;\u6491\u8d77\u5355\u5361\u8bad\u7ec3&#xff1b;<\/li>\n<li>Mish&#xff1a;\u89e3\u51b3\u68af\u5ea6\u4f20\u64ad\u6548\u7387\u7684\u95ee\u9898&#xff0c;\u6491\u8d77\u8bad\u7ec3\u7a33\u5b9a\u6027&#xff1b;<\/li>\n<li>CIoU \u4e0e\u6d88\u9664\u7f51\u683c\u654f\u611f&#xff1a;\u89e3\u51b3\u8fb9\u754c\u6846\u5b9a\u4f4d\u4e0d\u51c6\u7684\u95ee\u9898&#xff0c;\u6491\u8d77\u56de\u5f52\u7cbe\u5ea6&#xff1b;<\/li>\n<li>CSP&#xff1a;\u524a\u51cf\u5197\u4f59\u8ba1\u7b97&#xff0c;\u6491\u8d77\u63a8\u7406\u901f\u5ea6&#xff1b;<\/li>\n<li>SPP \/ PAN \/ SAM \u6539\u9020&#xff1a;\u6269\u5927\u611f\u53d7\u91ce\u3001\u589e\u5f3a\u591a\u5c3a\u5ea6\u7279\u5f81\u878d\u5408&#xff0c;\u6491\u8d77\u591a\u5c3a\u5ea6\u68c0\u6d4b\u80fd\u529b&#xff1b;<\/li>\n<li>\u9057\u4f20\u7b97\u6cd5&#xff1a;\u628a\u8d85\u53c2\u6570\u641c\u7d22\u81ea\u52a8\u5316&#xff0c;\u6491\u8d77\u53ef\u590d\u73b0\u6027\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u5f20\u5bf9\u7167\u8868&#xff0c;\u5c31\u662f\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u773c\u4e2d\u7684 YOLOv4 \u5168\u666f\u56fe\u3002<\/p>\n<h3>\u4e94\u3001\u6548\u679c&#xff1a;\u843d\u5230\u6570\u5b57\u4e0a\u662f\u4ec0\u4e48\u6c34\u5e73<\/h3>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u628a\u6548\u679c\u90e8\u5206\u653e\u5728\u8fd9\u91cc\u7565\u4f5c\u4ea4\u4ee3&#xff0c;\u56e0\u4e3a\u6570\u5b57\u672c\u8eab\u4e0d\u662f\u672c\u535a\u5ba2\u7684\u91cd\u70b9&#xff0c;\u4f46\u9700\u8981\u7528\u5b83\u4eec\u6765\u786e\u8ba4\u524d\u9762\u6240\u6709\u8bbe\u8ba1\u6ca1\u6709\u767d\u8d39\u3002<\/p>\n<p>\u5728 MS COCO \u6570\u636e\u96c6\u4e0a&#xff0c;YOLOv4 \u8f93\u5165 608\u00d7608 \u65f6&#xff0c;AP \u8fbe\u5230 43.5%&#xff0c;AP50 \u8fbe\u5230 65.7%&#xff0c;\u540c\u65f6\u5728\u4e00\u5f20 Tesla V100 \u4e0a\u80fd\u8dd1\u5230\u7ea6 62 FPS&#xff0c;\u5728 Maxwell \u67b6\u6784\u7684 GTX Titan X \u4e0a\u4e5f\u6709 23 FPS\u3002\u5bf9\u6bd4\u4e4b\u4e0b&#xff0c;YOLOv3 \u5728\u540c\u6837\u5c3a\u5ea6\u4e0b\u7684 AP \u662f 33.0%&#xff0c;\u901f\u5ea6\u7ea6 20 FPS\u3002\u4e5f\u5c31\u662f\u8bf4&#xff0c;YOLOv4 \u6bd4 YOLOv3 \u5728 AP \u4e0a\u63d0\u5347\u4e86\u7ea6 10 \u4e2a\u767e\u5206\u70b9&#xff0c;\u901f\u5ea6\u8fd8\u63d0\u5347\u4e86\u7ea6 12%\u3002\u5373\u4fbf\u548c\u5f53\u65f6\u7cbe\u5ea6\u540c\u6837\u5f88\u9ad8\u7684 EfficientDet \u76f8\u6bd4&#xff0c;YOLOv4 \u4e5f\u5728\u7cbe\u5ea6\u76f8\u8fd1\u7684\u524d\u63d0\u4e0b\u901f\u5ea6\u5feb\u51fa\u4e00\u5927\u622a&#xff0c;\u4f4d\u4e8e\u7cbe\u5ea6-\u901f\u5ea6\u6743\u8861\u7684\u5e15\u7d2f\u6258\u524d\u6cbf\u4e0a\u3002<\/p>\n<p>\u3010Figure 1&#xff1a;YOLOv4 \u4e0e\u5176\u4ed6\u4e3b\u6d41\u68c0\u6d4b\u5668\u5728 MS COCO \u4e0a\u7684\u901f\u5ea6-\u7cbe\u5ea6\u5bf9\u6bd4\u3011<\/p>\n<p>\u8865\u5929\u4e91\u8ba1\u7b97\u673a\u89c6\u89c9\u5b9e\u8df5\u60f3\u8865\u5145\u7684\u4e00\u70b9\u662f&#xff0c;\u4f5c\u8005\u7279\u610f\u5728 Maxwell\u3001Pascal\u3001Volta \u4e09\u4ee3\u4e0d\u540c\u67b6\u6784\u7684 GPU \u4e0a\u90fd\u505a\u4e86\u6d4b\u901f\u5bf9\u6bd4&#xff0c;\u800c\u4e0d\u662f\u53ea\u6311\u6700\u6709\u5229\u7684\u786c\u4ef6\u3002\u8fd9\u4efd\u7ec6\u5fc3\u8ba9\u5bf9\u6bd4\u66f4\u516c\u5e73&#xff0c;\u4e5f\u8ba9&#034;\u5355\u5361\u53ef\u590d\u73b0&#034;\u7684\u627f\u8bfa\u66f4\u53ef\u4fe1\u3002\u4e0d\u8fc7\u8981\u8bf4\u660e\u7684\u662f&#xff0c;\u8fd9\u4e9b\u6570\u5b57\u662f\u5f53\u65f6\u65f6\u95f4\u70b9\u4e0a\u7684\u5feb\u7167&#xff0c;\u540e\u7eed\u7684\u65b9\u6cd5\u4e0d\u65ad\u5728\u5237\u65b0\u7eaa\u5f55&#xff0c;\u6211\u4eec\u5f15\u7528\u5b83\u4eec&#xff0c;\u53ea\u662f\u4e3a\u4e86\u9a8c\u8bc1\u8bbe\u8ba1\u903b\u8f91\u7684\u6b63\u786e\u6027&#xff0c;\u800c\u4e0d\u662f\u4e3a\u4e86\u8bc1\u660e YOLOv4 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