{"id":4954,"date":"2022-07-21T10:23:05","date_gmt":"2022-07-21T02:23:05","guid":{"rendered":"http:\/\/139.9.1.231\/?p=4954"},"modified":"2022-08-31T15:17:10","modified_gmt":"2022-08-31T07:17:10","slug":"yolox-exceeding-yolo-series-in-2021","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/07\/21\/yolox-exceeding-yolo-series-in-2021\/","title":{"rendered":"YOLOX: Exceeding YOLO Series in 2021"},"content":{"rendered":"\n

https:\/\/yolox.readthedocs.io\/en\/latest\/quick_run.html<\/a><\/p>\n\n\n\n

\u8bba\u6587\u5730\u5740\uff1ahttps:\/\/arxiv.org\/abs\/2107.08430<\/p>\n\n\n\n

github\uff1ahttps:\/\/github.com\/Megvii-BaseDetection\/YOLOX<\/p>\n\n\n\n

\u7f51\u7edc\u7ed3\u6784\u53ef\u89c6\u5316\uff1a https:\/\/blog.csdn.net\/nan355655600\/article\/details\/119329848<\/p>\n\n\n\n

YOLOX \u662f YOLO \u7684\u65e0\u951a\u7248\u672c\uff0c\u8bbe\u8ba1\u66f4\u7b80\u5355\u4f46\u6027\u80fd\u66f4\u597d\uff01\u5b83\u65e8\u5728\u5f25\u5408\u7814\u7a76\u548c\u5de5\u4e1a\u754c\u4e4b\u95f4\u7684\u5dee\u8ddd\u3002<\/p>\n\n\n\n

YOLO\u7cfb\u5217\u59cb\u7ec8\u8ffd\u6c42\u5b9e\u65f6\u5e94\u7528\u7684\u6700\u4f73\u901f\u5ea6\u548c\u7cbe\u5ea6\u53d6\u820d\uff0c\u63d0\u53d6\u4e86\u5f53\u65f6\u53ef\u7528\u7684\u6700\u5148\u8fdb\u7684\u68c0\u6d4b\u6280\u672f\uff08\u4f8b\u5982\uff0canchor<\/a>\u7528\u4e8eYOLOv2\uff0c\u6b8b\u5dee\u7f51\u7edc\u7528\u4e8eYOLOv3\uff09\uff0c\u5e76\u4f18\u5316\u6700\u4f73\u5b9e\u8df5\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n

\u7136\u800c\u5728\u8fc7\u53bb\u7684\u4e24\u5e74\u4e2d\uff0c\u76ee\u6807\u68c0\u6d4b\u5b66\u672f\u754c\u7684\u4e3b\u8981\u8fdb\u5c55\u96c6\u4e2d\u5728anchor_free\u68c0\u6d4b\u5668\uff0c\u9ad8\u7ea7\u6807\u7b7e\u5206\u914d\u7b56\u7565\u548c\u7aef\u5230\u7aef(NMS-free)\u68c0\u6d4b\u5668\uff0c\u8fd9\u4e9b\u7814\u7a76\u6210\u679c\u8fd8\u6ca1\u6709\u88ab\u96c6\u6210\u5728YOLO\u7cfb\u5217\u4e2d\uff0cYOLOv4\u548cYOLOv5\u76ee\u524d\u8fd8\u662f\u4f7f\u7528\u4e86anchor_based\u53ca\u624b\u52a8\u7684\u6307\u5b9a\u8bad\u7ec3\u5206\u914d\u89c4\u5219\uff08\u6bd4\u5982anchor\u76f8\u5173\u7684\u8bbe\u7f6e\uff09\u3002<\/p>\n\n\n\n

\u4f5c\u8005\u8fd8\u8ba4\u4e3a\uff0cYOLOv4\u548cYOLOv5\u4e2d\u5bf9anchor\u6709\u70b9\u8fc7\u5ea6\u7684\u4f18\u5316\uff0c\u6240\u4ee5\u91cd\u65b0\u5c06YOLOv3<\/a>-SPP\u7248\u672c\u4f5c\u4e3a\u4f18\u5316\u8d77\u70b9\u3002\u539f\u56e0\u662f\uff0cYOLOv3\u7531\u4e8e\u8ba1\u7b97\u8d44\u6e90\u6709\u9650\uff0c\u5728\u5404\u79cd\u5b9e\u9645\u5e94\u7528\u4e2d\u8f6f\u4ef6\u652f\u6301\u4e0d\u8db3\uff0c\u4ecd\u7136\u662f\u884c\u4e1a\u4e2d\u5e94\u7528\u6700\u5e7f\u6cdb\u7684\u63a2\u6d4b\u5668\u4e4b\u4e00\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

1\u3001\u7f51\u7edc\u7ed3\u6784\uff1a<\/p>\n\n\n\n

\u5148\u770b\u4e0bYolov3\u3001Yolov4\u3001Yolov5<\/strong>\u7684\u7f51\u7edc\u7ed3\u6784\u56fe\uff0c\u800c\u540e\u9762\u7684Yolox\u7f51\u7edc\uff0c\u90fd\u662f\u5728\u6b64\u57fa\u7840\u4e0a\u5ef6\u4f38\u800c\u6765\u7684\u3002<\/p>\n\n\n\n

\u2460 Yolov3\u7f51\u7edc\u7ed3\u6784\u56fe<\/strong><\/p>\n\n\n\n

\"preview\"\/<\/figure>\n\n\n\n

Yolov3\u662f\u57282018\u5e74\u63d0\u51fa\uff0c\u4e5f\u662f\u5de5\u4e1a\u754c\u4f7f\u7528\u975e\u5e38\u5e7f\u6cdb\u7684\u76ee\u6807\u68c0\u6d4b\u7b97\u6cd5\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u5728Yolox\u7cfb\u5217\u4e2d\u7684\uff0cYolox-Darknet53\u6a21\u578b\uff0c\u91c7\u7528\u7684Baseline\u57fa\u51c6\u7f51\u7edc\uff0c\u91c7\u7528\u7684\u5e76\u4e0d\u662fYolov3\u7248\u672c<\/strong>\uff0c\u800c\u662f\u6539\u8fdb\u540e\u7684Yolov3_spp\u7248\u672c\u3002<\/strong><\/p>\n\n\n\n

\u800cYolov3\u548cYolov3_spp\u7684\u4e0d\u540c\u70b9\u5728\u4e8e\uff0cYolov3\u7684\u4e3b\u5e72\u7f51\u7edc\u540e\u9762\uff0c\u6dfb\u52a0\u4e86spp\u7ec4\u4ef6<\/strong>\uff0c\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u3002<\/p>\n\n\n\n

\u2461 Yolov4\u7f51\u7edc\u7ed3\u6784\u56fe<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e0a\u56fe\u662fDarknetAB\u5927\u795e\uff0c\u57282020\u5e74\u63d0\u51fa\u7684Yolov4\u7b97\u6cd5\u3002<\/p>\n\n\n\n

\u5728\u6b64\u7b97\u6cd5\u4e2d\uff0c\u7f51\u7edc\u7684\u5f88\u591a\u5730\u65b9\uff0c\u90fd\u8fdb\u884c\u4e86\u6539\u8fdb\u3002<\/p>\n\n\n\n

\u6bd4\u5982\u8f93\u5165\u7aef\uff1a<\/strong>\u91c7\u7528Mosaic\u6570\u636e\u589e\u5f3a\uff1b<\/p>\n\n\n\n

Backbone\uff1a<\/strong>\u91c7\u7528\u4e86CSPDarknet53\u3001Mish\u6fc0\u6d3b\u51fd\u6570\u3001Dropblock\u7b49\u65b9\u5f0f\uff1b<\/p>\n\n\n\n

Neck\uff1a<\/strong>\u91c7\u7528\u4e86SPP\uff08\u6309\u7167DarknetAB\u7684\u8bbe\u5b9a\uff09\u3001FPN+PAN\u7ed3\u6784\uff1b<\/p>\n\n\n\n

\u8f93\u51fa\u7aef\uff1a<\/strong>\u91c7\u7528CIOU_Loss\u3001DIOU_Nms\u64cd\u4f5c\u3002<\/p>\n\n\n\n

\u56e0\u6b64\u53ef\u4ee5\u770b\u51fa\uff0cYolov4\u5bf9Yolov3\u7684\u5404\u4e2a\u90e8\u5206\uff0c\u90fd\u8fdb\u884c\u4e86\u5f88\u591a\u7684\u6574\u5408\u521b\u65b0\u3002<\/p>\n\n\n\n

\u2462 Yolov5\u7f51\u7edc\u7ed3\u6784\u56fe<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u800c\u5728Yolov5\u7f51\u7edc\u4e2d\uff0c\u548cYolov4\u4e0d\u540c\uff0c\u6700\u5927\u7684\u521b\u65b0\u70b9\u5728\u4e8e\uff0c\u4f5c\u8005\u5c06\u7f51\u7edc\u7ed3\u6784\uff0c\u505a\u6210\u4e86\u53ef\u9009\u62e9\u914d\u7f6e\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u6bd4\u5982\u4e3b\u5e72\u7f51\u7edc\u7ed3\u6784\uff0c\u6839\u636e\u5404\u4e2a\u7f51\u7edc\u7684\u5bbd\u5ea6\u3001\u9ad8\u5ea6\u4e0d\u540c\uff0c\u53ef\u4ee5\u5206\u4e3aYolov5s\u3001Yolov5l\u3001Yolov5s\u3001Yolo5x\u7b49\u7248\u672c\u3002<\/strong><\/p>\n\n\n\n

\u8fd9\u79cd\u8f6c\u53d8\uff0c\u5728\u76ee\u6807\u68c0\u6d4b\u9886\u57df\uff0c\u5f15\u9886\u4e86\u4e00\u80a1\u7f51\u7edc\u62c6\u5206\u7684\u70ed\u6f6e\u3002<\/p>\n\n\n\n

\u672c\u6587\u7684Yolox\u7b97\u6cd5\uff0c\u4e5f\u4ece\u8fd9\u4e2a\u89d2\u5ea6\u51fa\u53d1\uff0c\u5c06Yolox\u6a21\u578b\uff0c\u53d8\u4e3a\u591a\u79cd\u53ef\u9009\u914d\u7684\u7f51\u7edc\uff0c\u6bd4\u5982\u6807\u51c6\u7f51\u7edc\u7ed3\u6784\u548c\u8f7b\u91cf\u7ea7\u7f51\u7edc\u7ed3\u6784\u3002<\/p>\n\n\n\n

\uff081\uff09\u6807\u51c6\u7f51\u7edc\u7ed3\u6784\uff1a<\/strong>Yolox-s\u3001Yolox-m\u3001Yolox-l\u3001Yolox-x\u3001Yolox-Darknet53\u3002<\/p>\n\n\n\n

\uff082\uff09\u8f7b\u91cf\u7ea7\u7f51\u7edc\u7ed3\u6784\uff1a<\/strong>Yolox-Nano\u3001Yolox-Tiny\u3002<\/p>\n\n\n\n

\u5728\u5b9e\u9645\u7684\u9879\u76ee\u4e2d\uff0c\u5927\u5bb6\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u9879\u76ee\u9700\u6c42\uff0c\u8fdb\u884c\u6311\u9009\u4f7f\u7528\u3002<\/p>\n\n\n\n

\u4ece\u4e0a\u9762\u7684\u63cf\u8ff0\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053Yolox\u6574\u4f53\u7684\u6539\u8fdb\u601d\u8def\uff1a<\/strong><\/p>\n\n\n\n

\uff081\uff09\u57fa\u51c6\u6a21\u578b\uff1aYolov3_spp<\/strong><\/p>\n\n\n\n

\u9009\u62e9Yolov3_spp\u7ed3\u6784\uff0c\u5e76\u6dfb\u52a0\u4e00\u4e9b\u5e38\u7528\u7684\u6539\u8fdb\u65b9\u5f0f\uff0c\u4f5c\u4e3aYolov3 baseline\u57fa\u51c6\u6a21\u578b\uff1b<\/strong><\/p>\n\n\n\n

\uff082\uff09Yolox-Darknet53<\/strong><\/p>\n\n\n\n

\u5bf9Yolov3 baseline\u57fa\u51c6\u6a21\u578b\uff0c\u6dfb\u52a0\u5404\u79cdtrick\uff0c\u6bd4\u5982Decoupled Head\u3001SimOTA\u7b49\uff0c\u5f97\u5230Yolox-Darknet53\u7248\u672c\uff1b<\/strong><\/p>\n\n\n\n

\uff083\uff09Yolox-s\u3001Yolox-m\u3001Yolox-l\u3001Yolox-x\u7cfb\u5217<\/strong><\/p>\n\n\n\n

\u5bf9Yolov5\u7684\u56db\u4e2a\u7248\u672c\uff0c\u91c7\u7528\u8fd9\u4e9b\u6709\u6548\u7684trick\uff0c\u9010\u4e00\u8fdb\u884c\u6539\u8fdb\uff0c\u5f97\u5230Yolox-s\u3001Yolox-m\u3001Yolox-l\u3001Yolox-x\u56db\u4e2a\u7248\u672c\uff1b<\/strong><\/p>\n\n\n\n

\uff084\uff09\u8f7b\u91cf\u7ea7\u7f51\u7edc<\/strong><\/p>\n\n\n\n

\u8bbe\u8ba1\u4e86Yolox-Nano\u3001Yolox-Tiny\u8f7b\u91cf\u7ea7\u7f51\u7edc<\/strong>\uff0c\u5e76\u6d4b\u8bd5\u4e86\u4e00\u4e9btrick\u7684\u9002\u7528\u6027\uff1b<\/p>\n\n\n\n

\u57fa\u51c6\u6a21\u578b\uff1aYolov3_spp<\/h3>\n\n\n\n

\u5728\u8bbe\u8ba1\u7b97\u6cd5\u65f6\uff0c\u4e3a\u4e86\u5bf9\u6bd4\u6539\u8fdbtrick\u7684\u597d\u574f\uff0c\u5e38\u5e38\u9700\u8981\u9009\u62e9\u57fa\u51c6\u7684\u6a21\u578b\u7b97\u6cd5\u3002<\/strong><\/p>\n\n\n\n

\u800c\u5728\u9009\u62e9Yolox\u7684\u57fa\u51c6\u6a21\u578b\u65f6\uff0c\u4f5c\u8005\u8003\u8651\u5230\uff1a<\/p>\n\n\n\n

Yolov4\u548cYolov5\u7cfb\u5217\uff0c\u4ece\u57fa\u4e8e\u951a\u6846\u7684\u7b97\u6cd5\u89d2\u5ea6\u6765\u8bf4\uff0c\u53ef\u80fd\u6709\u4e00\u4e9b\u8fc7\u5ea6\u4f18\u5316<\/strong>\uff0c\u56e0\u6b64\u6700\u7ec8\u9009\u62e9\u4e86Yolov3\u7cfb\u5217\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u4e5f\u5e76\u6ca1\u6709\u76f4\u63a5\u9009\u62e9Yolov3\u7cfb\u5217\u4e2d\uff0c\u6807\u51c6\u7684Yolov3\u7b97\u6cd5\uff0c\u800c\u662f\u9009\u62e9\u6dfb\u52a0\u4e86spp\u7ec4\u4ef6\uff0c\u8fdb\u800c\u6027\u80fd\u66f4\u4f18\u7684Yolov3_spp\u7248\u672c\u3002<\/strong><\/p>\n\n\n\n

\u4ee5\u4e0b\u662f\u8bba\u6587\u4e2d\u7684\u89e3\u91ca\uff1a<\/strong><\/p>\n\n\n\n

Considering YOLOv4 and YOLOv5 may be a little over-optimized for the anchor-based pipeline, we choose YOLOv3 [25] as our start point (we set YOLOv3-SPP as the default YOLOv3)\u3002<\/p>\n\n\n\n

\u4e3a\u4e86\u4fbf\u4e8e\u7406\u89e3\uff0c\u5728\u524d\u9762Yolov3\u7ed3\u6784\u56fe\u7684\u57fa\u7840\u4e0a\uff0c\u6dfb\u52a0\u4e0aspp\u7ec4\u4ef6\uff0c\u53d8\u4e3a\u4e0b\u56fe\u6240\u793a\u7684Yolov3_spp\u7f51\u7edc\u3002<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5927\u5bb6\u53ef\u4ee5\u770b\u5230\uff0c\u4e3b\u5e72\u7f51\u7edcBackbone\u540e\u9762\uff0c\u589e\u52a0\u4e86\u4e00\u4e2aSPP\u7ec4\u4ef6\u3002<\/p>\n\n\n\n

\u5f53\u7136\u5728\u6b64\u57fa\u7840\u4e0a\uff0c\u5bf9\u7f51\u7edc\u8bad\u7ec3\u8fc7\u7a0b\u4e2d\u7684\u5f88\u591a\u5730\u65b9\uff0c\u90fd\u8fdb\u884c\u4e86\u6539\u8fdb<\/strong>\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n

\uff081\uff09\u6dfb\u52a0\u4e86EMA\u6743\u503c\u66f4\u65b0\u3001Cosine\u5b66\u4e60\u7387\u673a\u5236\u7b49\u8bad\u7ec3\u6280\u5de7<\/p>\n\n\n\n

\uff082\uff09\u4f7f\u7528IOU\u635f\u5931\u51fd\u6570\u8bad\u7ec3reg\u5206\u652f\uff0cBCE\u635f\u5931\u51fd\u6570\u8bad\u7ec3cls\u4e0eobj\u5206\u652f<\/p>\n\n\n\n

\uff083\uff09\u6dfb\u52a0\u4e86RandomHorizontalFlip\u3001ColorJitter\u4ee5\u53ca\u591a\u5c3a\u5ea6\u6570\u636e\u589e\u5e7f\uff0c\u79fb\u9664\u4e86RandomResizedCrop\u3002<\/p>\n\n\n\n

\u5728\u6b64\u57fa\u7840\u4e0a\uff0cYolov3_spp\u7684AP\u503c\u8fbe\u523038.5\uff0c\u5373\u4e0b\u56fe\u4e2d\u7684Yolov3 baseline\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Yolox-Darknet53<\/h3>\n\n\n\n

\u6211\u4eec\u5728\u524d\u9762\u77e5\u9053\uff0c\u5f53\u5f97\u5230Yolov3 baseline\u540e\uff0c\u4f5c\u8005\u53c8\u6dfb\u52a0\u4e86\u4e00\u7cfb\u5217\u7684trick\uff0c\u6700\u7ec8\u6539\u8fdb\u4e3aYolox-Darknet53\u7f51\u7edc\u7ed3\u6784<\/strong>\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e0a\u56fe\u5373\u662fYolox-Darknet53\u7f51\u7edc\u7ed3\u6784\u56fe\u3002<\/p>\n\n\n\n

\u4e3a\u4e86\u4fbf\u4e8e\u5206\u6790\u6539\u8fdb\u70b9\uff0c\u6211\u4eec\u5bf9Yolox-Darknet53\u7f51\u7edc\u7ed3\u6784\u8fdb\u884c\u62c6\u5206\uff0c\u53d8\u4e3a\u56db\u4e2a\u677f\u5757\uff1a<\/p>\n\n\n\n

\u2460 \u8f93\u5165\u7aef\uff1a<\/strong>Strong augmentation\u6570\u636e\u589e\u5f3a<\/p>\n\n\n\n

\u2461 BackBone\u4e3b\u5e72\u7f51\u7edc\uff1a<\/strong>\u4e3b\u5e72\u7f51\u7edc\u6ca1\u6709\u4ec0\u4e48\u53d8\u5316\uff0c\u8fd8\u662fDarknet53\u3002<\/p>\n\n\n\n

\u2462 Neck\uff1a<\/strong>\u6ca1\u6709\u4ec0\u4e48\u53d8\u5316\uff0cYolov3 baseline\u7684Neck\u5c42\u8fd8\u662fFPN\u7ed3\u6784\u3002<\/p>\n\n\n\n

\u2463 Prediction\uff1a<\/strong>Decoupled Head\u3001End-to-End YOLO\u3001Anchor-free\u3001Multi positives\u3002<\/p>\n\n\n\n

\u5728\u7ecf\u8fc7\u4e00\u7cfb\u5217\u7684\u6539\u8fdb\u540e\uff0cYolox-Darknet53\u6700\u7ec8\u8fbe\u5230AP47.3\u7684\u6548\u679c\u3002<\/strong><\/p>\n\n\n\n

\u4e0b\u9762\u6211\u4eec\u5bf9\u4e8eYolox-Darknet53\u7684\u8f93\u5165\u7aef\u3001Backbone\u3001Neck\u3001Prediction<\/strong>\u56db\u4e2a\u90e8\u5206\uff0c\u8fdb\u884c\u8be6\u89e3\u7684\u62c6\u89e3\u3002<\/p>\n\n\n\n

\u8f93\u5165\u7aef\uff1a<\/p>\n\n\n\n

\uff081\uff09Strong augmentation<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5728\u7f51\u7edc\u7684\u8f93\u5165\u7aef\uff0cYolox\u4e3b\u8981\u91c7\u7528\u4e86Mosaic\u3001Mixup\u4e24\u79cd\u6570\u636e\u589e\u5f3a\u65b9\u6cd5\u3002<\/strong><\/p>\n\n\n\n

\u800c\u91c7\u7528\u4e86\u8fd9\u4e24\u79cd\u6570\u636e\u589e\u5f3a\uff0c\u76f4\u63a5\u5c06Yolov3 baseline\uff0c\u63d0\u5347\u4e862.4\u4e2a\u767e\u5206\u70b9\u3002<\/p>\n\n\n\n

\u2460 Mosaic\u6570\u636e\u589e\u5f3a<\/strong><\/p>\n\n\n\n

Mosaic\u589e\u5f3a\u7684\u65b9\u5f0f\uff0c\u662fU\u7248YOLOv3\u5f15\u5165\u7684\u4e00\u79cd\u975e\u5e38\u6709\u6548\u7684\u589e\u5f3a\u7b56\u7565\u3002<\/p>\n\n\n\n

\u800c\u4e14\u5728Yolov4\u3001Yolov5\u7b97\u6cd5\u4e2d\uff0c\u4e5f\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n

\u901a\u8fc7\u968f\u673a\u7f29\u653e<\/strong>\u3001\u968f\u673a\u88c1\u526a<\/strong>\u3001\u968f\u673a\u6392\u5e03<\/strong>\u7684\u65b9\u5f0f\u8fdb\u884c\u62fc\u63a5\uff0c\u5bf9\u4e8e\u5c0f\u76ee\u6807<\/strong>\u7684\u68c0\u6d4b\u6548\u679c\u63d0\u5347\uff0c\u8fd8\u662f\u5f88\u4e0d\u9519\u7684\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u2461 MixUp\u6570\u636e\u589e\u5f3a<\/strong><\/p>\n\n\n\n

MixUp\u662f\u5728Mosaic\u57fa\u7840\u4e0a\uff0c\u589e\u52a0\u7684\u4e00\u79cd\u989d\u5916\u7684\u589e\u5f3a\u7b56\u7565\u3002<\/strong><\/p>\n\n\n\n

\u4e3b\u8981\u6765\u6e90\u4e8e2017\u5e74\uff0c\u9876\u4f1aICLR\u7684\u4e00\u7bc7\u8bba\u6587\u300amixup: Beyond Empirical Risk Minimization\u300b<\/a>\u3002\u5f53\u65f6\u4e3b\u8981\u5e94\u7528\u5728\u56fe\u50cf\u5206\u7c7b\u4efb\u52a1\u4e2d<\/strong>\uff0c\u53ef\u4ee5\u5728\u51e0\u4e4e\u65e0\u989d\u5916\u8ba1\u7b97\u5f00\u9500\u7684\u60c5\u51b5\u4e0b\uff0c\u7a33\u5b9a\u63d0\u53471\u4e2a\u767e\u5206\u70b9\u7684\u5206\u7c7b\u7cbe\u5ea6\u3002<\/strong><\/p>\n\n\n\n

\u800c\u5728Yolox\u4e2d\uff0c\u5219\u4e5f\u5e94\u7528\u5230\u76ee\u6807\u68c0\u6d4b\u4e2d\uff0c\u4ee3\u7801\u5728yolox\/datasets\/mosaicdetection.py\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5176\u5b9e\u65b9\u5f0f\u5f88\u7b80\u5355\uff0c\u6bd4\u5982\u6211\u4eec\u5728\u505a\u4eba\u8138\u68c0\u6d4b\u7684\u4efb\u52a1<\/strong>\u3002<\/p>\n\n\n\n

\u5148\u8bfb\u53d6\u4e00\u5f20\u56fe\u7247\uff0c\u56fe\u50cf\u4e24\u4fa7\u586b\u5145\uff0c\u7f29\u653e\u5230640*640\u5927\u5c0f\uff0c\u5373Image_1\uff0c\u4eba\u8138\u68c0\u6d4b\u6846\u4e3a\u7ea2\u8272\u6846\u3002<\/p>\n\n\n\n

\u518d\u968f\u673a\u9009\u53d6\u4e00\u5f20\u56fe\u7247\uff0c\u56fe\u50cf\u4e0a\u4e0b\u586b\u5145\uff0c\u4e5f\u7f29\u653e\u5230640*640\u5927\u5c0f\uff0c\u5373Image_2\uff0c\u4eba\u8138\u68c0\u6d4b\u6846\u4e3a\u84dd\u8272\u6846\u3002<\/p>\n\n\n\n

\u7136\u540e\u8bbe\u7f6e\u4e00\u4e2a\u878d\u5408\u7cfb\u6570\uff0c\u6bd4\u5982\u4e0a\u56fe\u4e2d\uff0c\u8bbe\u7f6e\u4e3a0.5\uff0c\u5c06Image_1\u548cImage_2\uff0c\u52a0\u6743\u878d\u5408\uff0c\u6700\u7ec8\u5f97\u5230\u53f3\u9762\u7684Image\u3002<\/p>\n\n\n\n

\u4ece\u53f3\u56fe\u53ef\u4ee5\u770b\u51fa\uff0c\u4eba\u8138\u7684\u7ea2\u8272\u6846\u548c\u84dd\u8272\u6846\u662f\u53e0\u52a0\u5b58\u5728\u7684\u3002<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u77e5\u9053\uff0c\u5728Mosaic\u548cMixup\u7684\u57fa\u7840\u4e0a\uff0cYolov3 baseline\u589e\u52a0\u4e862.4\u4e2a\u767e\u5206\u70b9<\/strong>\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u6709\u4e24\u70b9\u9700\u8981\u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n

\uff081\uff09\u5728\u8bad\u7ec3\u7684\u6700\u540e15\u4e2aepoch<\/strong>\uff0c\u8fd9\u4e24\u4e2a\u6570\u636e\u589e\u5f3a\u4f1a\u88ab\u5173\u95ed\u6389\u3002<\/p>\n\n\n\n

\u800c\u5728\u6b64\u4e4b\u524d\uff0cMosaic\u548cMixup\u6570\u636e\u589e\u5f3a\uff0c\u90fd\u662f\u6253\u5f00\u7684\uff0c\u8fd9\u4e2a\u7ec6\u8282\u9700\u8981\u6ce8\u610f\u3002<\/p>\n\n\n\n

\uff082\uff09\u7531\u4e8e\u91c7\u53d6\u4e86\u66f4\u5f3a\u7684\u6570\u636e\u589e\u5f3a\u65b9\u5f0f\uff0c\u4f5c\u8005\u5728\u7814\u7a76\u4e2d\u53d1\u73b0\uff0cImageNet\u9884\u8bad\u7ec3\u5c06\u6beb\u65e0\u610f\u4e49<\/strong>\uff0c\u56e0\u6b64\uff0c\u6240\u6709\u7684\u6a21\u578b\uff0c\u5747\u662f\u4ece\u5934\u5f00\u59cb\u8bad\u7ec3\u7684\u3002<\/strong><\/p>\n\n\n\n

2 Backbone<\/h3>\n\n\n\n

Yolox-Darknet53\u7684Backbone\u4e3b\u5e72\u7f51\u7edc\uff0c\u548c\u539f\u672c\u7684Yolov3 baseline\u7684\u4e3b\u5e72\u7f51\u7edc\u90fd\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u90fd\u662f\u91c7\u7528Darknet53\u7684\u7f51\u7edc\u7ed3\u6784<\/p>\n\n\n\n

3 Neck<\/h3>\n\n\n\n

\u5728Neck\u7ed3\u6784\u4e2d\uff0cYolox-Darknet53\u548cYolov3 baseline\u7684Neck\u7ed3\u6784\uff0c\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u90fd\u662f\u91c7\u7528FPN\u7684\u7ed3\u6784<\/strong>\u8fdb\u884c\u878d\u5408\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5982\u4e0b\u56fe\u6240\u793a\uff0cFPN\u81ea\u9876\u5411\u4e0b<\/strong>\uff0c\u5c06\u9ad8\u5c42\u7684\u7279\u5f81\u4fe1\u606f\uff0c\u901a\u8fc7\u4e0a\u91c7\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u4f20\u9012\u878d\u5408<\/strong>\uff0c\u5f97\u5230\u8fdb\u884c\u9884\u6d4b\u7684\u7279\u5f81\u56fe\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

Prediction\u5c42<\/h3>\n\n\n\n

\u5728\u8f93\u51fa\u5c42\u4e2d\uff0c\u4e3b\u8981\u4ece\u56db\u4e2a\u65b9\u9762\u8fdb\u884c\u8bb2\u89e3\uff1aDecoupled Head<\/strong>\u3001Anchor Free<\/strong>\u3001\u6807\u7b7e\u5206\u914d\u3001Loss\u8ba1\u7b97\u3002<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\uff081\uff09Decoupled Head<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u5148\u6765\u770b\u4e00\u4e0bDecoupled Head\uff0c\u76ee\u524d\u5728\u5f88\u591a\u4e00\u9636\u6bb5\u7f51\u7edc\u4e2d\u90fd\u6709\u7c7b\u4f3c\u5e94\u7528\uff0c\u6bd4\u5982RetinaNet\u3001FCOS\u7b49<\/strong>\u3002<\/p>\n\n\n\n

\u800c\u5728Yolox\u4e2d\uff0c\u4f5c\u8005\u589e\u52a0\u4e86\u4e09\u4e2aDecoupled Head\uff0c\u4fd7\u79f0\u201c\u89e3\u8026\u5934\u201d<\/p>\n\n\n\n

\u5927\u767d\u8fd9\u91cc\u4ece\u4e24\u4e2a\u65b9\u9762\u5bf9Decoupled Head\u8fdb\u884c\u8bb2\u89e3\uff1a<\/p>\n\n\n\n

\u2460 \u4e3a\u4ec0\u4e48\u4f7f\u7528Decoupled Head\uff1f<\/strong><\/p>\n\n\n\n

\u2461 Decoupled Head\u7684\u7ec6\u8282\uff1f<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4ece\u4e0a\u56fe\u53f3\u9762\u7684Prediction\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u6709\u4e09\u4e2aDecoupled Head\u5206\u652f\u3002<\/p>\n\n\n\n

\u2460 \u4e3a\u4ec0\u4e48\u4f7f\u7528Decoupled Head\uff1f<\/strong><\/p>\n\n\n\n

\u5728\u4e86\u89e3\u539f\u7406\u524d\uff0c\u6211\u4eec\u5148\u4e86\u89e3\u4e0b\u6539\u8fdb\u7684\u539f\u56e0\u3002\u4e3a\u4ec0\u4e48\u5c06\u539f\u672c\u7684Yolo head<\/strong>\uff0c\u4fee\u6539\u4e3aDecoupled Head<\/strong>\u5462\uff1f<\/p>\n\n\n\n

\u6211\u4eec\u5148\u770b\u4e00\u5f20\u8bba\u6587\u4e2d\u7684\u8868\u683c\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5728\u524d\u97623.2.1 \u57fa\u51c6\u7f51\u7edc\u4e2d\uff0c\u6211\u4eec\u77e5\u9053Yolov3 baseline\u7684AP\u503c\u4e3a38.5\u3002<\/strong><\/p>\n\n\n\n

\u4f5c\u8005\u60f3\u7ee7\u7eed\u6539\u8fdb\uff0c\u6bd4\u5982\u8f93\u51fa\u7aef\u6539\u8fdb\u4e3aEnd-to-end\u7684\u65b9\u5f0f\uff08\u5373\u65e0NMS\u7684\u5f62\u5f0f\uff09\u3002<\/p>\n\n\n\n

\u4f46\u610f\u5916\u7684\u53d1\u73b0\uff0c\u6539\u8fdb\u5b8c\u4e4b\u540e\u7684AP\u503c\u53ea\u670934.3<\/strong>\u3002<\/p>\n\n\n\n

\u800c\u57282020\u5e7412\u6708\u4efd\uff0c\u65f7\u89c6\u79d1\u6280\u53d1\u8868\u7684\u300aEnd-to-End Object Detection with Fully Convolution Network\u300b<\/a>\u4e2d\u3002<\/p>\n\n\n\n

\u5728\u5bf9FCOS\u6539\u8fdb\u4e3a\u65e0NMS\u65f6\uff0c\u5728COCO\u4e0a\uff0c\u8fbe\u5230\u4e86\u4e0e\u6709NMS\u7684FCOS\uff0c\u76f8\u5f53\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n

\u90a3\u8fd9\u65f6\u5c31\u5947\u602a\u4e86\uff0c\u4e3a\u4ec0\u4e48\u5728Yolo\u4e0a\u6539\u8fdb\uff0c\u4f1a\u4e0b\u964d\u8fd9\u4e48\u591a\uff1f<\/strong><\/p>\n\n\n\n

\u5728\u5076\u7136\u95f4\uff0c\u4f5c\u8005\u5c06End-to-End\u4e2d\u7684Yolo Head\uff0c\u4fee\u6539\u4e3aDecoupled Head\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u60ca\u559c\u7684\u53d1\u73b0\uff0cEnd-to-end Yolo\u7684AP\u503c\uff0c\u4ece34.3\u589e\u52a0\u523038.8\u3002<\/strong><\/p>\n\n\n\n

\u90a3End-to-end\u7684\u65b9\u5f0f\u6709\u6548\u679c\uff0cYolov3 baseline\u4e2d\u662f\u5426\u4e5f\u6709\u6548\u679c\u5462\uff1f<\/strong><\/p>\n\n\n\n

\u7136\u540e\u4f5c\u8005\u53c8\u5c06Yolov3 baseline \u4e2dYolo Head\uff0c\u4e5f\u4fee\u6539\u4e3aDecoupled Head\u3002<\/p>\n\n\n\n

\u53d1\u73b0AP\u503c\uff0c\u4ece38.5<\/strong>\uff0c\u589e\u52a0\u523039.6<\/strong>\u3002<\/p>\n\n\n\n

\u5f53\u7136\u4f5c\u8005\u5728\u5b9e\u9a8c\u4e2d\u8fd8\u53d1\u73b0\uff0c\u4e0d\u5355\u5355\u662f\u7cbe\u5ea6\u4e0a\u7684\u63d0\u9ad8<\/strong>\u3002\u66ff\u6362\u4e3aDecoupled Head\u540e\uff0c\u7f51\u7edc\u7684\u6536\u655b\u901f\u5ea6\u4e5f\u52a0\u5feb\u4e86\u3002<\/strong><\/p>\n\n\n\n

\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a\u5c06\u68c0\u6d4b\u5934\u89e3\u8026\uff0c\u4f1a\u589e\u52a0\u8fd0\u7b97\u7684\u590d\u6742\u5ea6\u3002<\/strong><\/p>\n\n\n\n

\u56e0\u6b64\u4f5c\u8005\u7ecf\u8fc7\u901f\u5ea6\u548c\u6027\u80fd\u4e0a\u7684\u6743\u8861\uff0c\u6700\u7ec8\u4f7f\u7528 1\u4e2a1×1 \u7684\u5377\u79ef\u5148\u8fdb\u884c\u964d\u7ef4\uff0c\u5e76\u5728\u540e\u9762\u4e24\u4e2a\u5206\u652f\u91cc\uff0c\u5404\u4f7f\u7528\u4e86 2\u4e2a3×3 \u5377\u79ef\uff0c\u6700\u7ec8\u8c03\u6574\u5230\u4ec5\u4ec5\u589e\u52a0\u4e00\u70b9\u70b9\u7684\u7f51\u7edc\u53c2\u6570\u3002<\/p>\n\n\n\n

\u800c\u4e14\u8fd9\u91cc\u89e3\u8026\u540e\uff0c\u8fd8\u6709\u4e00\u4e2a\u66f4\u6df1\u5c42\u6b21\u7684\u91cd\u8981\u6027\uff1a<\/p>\n\n\n\n

Yolox\u7684\u7f51\u7edc\u67b6\u6784\uff0c\u53ef\u4ee5\u548c\u5f88\u591a\u7b97\u6cd5\u4efb\u52a1\uff0c\u8fdb\u884c\u4e00\u4f53\u5316\u7ed3\u5408\u3002<\/strong><\/p>\n\n\n\n

\u6bd4\u5982\uff1a<\/strong><\/p>\n\n\n\n

\uff081\uff09YOLOX + Yolact\/CondInst\/SOLO \uff0c\u5b9e\u73b0\u7aef\u4fa7\u7684\u5b9e\u4f8b\u5206\u5272\u3002<\/strong><\/p>\n\n\n\n

\uff082\uff09YOLOX + 34 \u5c42\u8f93\u51fa\uff0c\u5b9e\u73b0\u7aef\u4fa7\u4eba\u4f53\u7684\u00a017 \u4e2a\u5173\u952e\u70b9\u68c0\u6d4b\u3002<\/strong><\/p>\n\n\n\n

\u2461 Decoupled Head\u7684\u7ec6\u8282\uff1f<\/strong><\/p>\n\n\n\n

\u4e86\u89e3\u4e86Decoupled Head\u7684\u6765\u6e90\uff0c\u518d\u770b\u4e00\u4e0bDecoupled Head\u7684\u7ec6\u8282\u3002<\/p>\n\n\n\n

\u6211\u4eec\u5c06Yolox-Darknet53\u4e2d\uff0cDecoupled Head\u2460\u63d0\u53d6\u51fa\u6765\uff0c\u7ecf\u8fc7\u524d\u9762\u7684Neck\u5c42\uff0c\u8fd9\u91ccDecouple Head\u2460\u8f93\u5165\u7684\u957f\u5bbd\u4e3a20*20\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4ece\u56fe\u4e0a\u53ef\u4ee5\u770b\u51fa\uff0cConcat\u524d\u603b\u5171\u6709\u4e09\u4e2a\u5206\u652f<\/strong>\uff1a<\/p>\n\n\n\n

\uff081\uff09cls_output\uff1a<\/strong>\u4e3b\u8981\u5bf9\u76ee\u6807\u6846\u7684\u7c7b\u522b\uff0c\u9884\u6d4b\u5206\u6570\u3002\u56e0\u4e3aCOCO\u6570\u636e\u96c6\u603b\u5171\u670980\u4e2a\u7c7b\u522b\uff0c\u4e14\u4e3b\u8981\u662fN\u4e2a\u4e8c\u5206\u7c7b\u5224\u65ad\uff0c\u56e0\u6b64\u7ecf\u8fc7Sigmoid\u6fc0\u6d3b\u51fd\u6570\u5904\u7406\u540e\uff0c\u53d8\u4e3a20*20*80\u5927\u5c0f\u3002<\/p>\n\n\n\n

\uff082\uff09obj_output\uff1a<\/strong>\u4e3b\u8981\u5224\u65ad\u76ee\u6807\u6846\u662f\u524d\u666f\u8fd8\u662f\u80cc\u666f\uff0c\u56e0\u6b64\u7ecf\u8fc7Sigmoid\u5904\u7406\u597d\uff0c\u53d8\u4e3a20*20*1\u5927\u5c0f\u3002<\/p>\n\n\n\n

\uff083\uff09reg_output\uff1a<\/strong>\u4e3b\u8981\u5bf9\u76ee\u6807\u6846\u7684\u5750\u6807\u4fe1\u606f\uff08x\uff0cy\uff0cw\uff0ch\uff09\u8fdb\u884c\u9884\u6d4b\uff0c\u56e0\u6b64\u5927\u5c0f\u4e3a20*20*4\u3002<\/p>\n\n\n\n

\u6700\u540e\u4e09\u4e2aoutput\uff0c\u7ecf\u8fc7Concat\u878d\u5408\u5230\u4e00\u8d77\uff0c\u5f97\u523020*20*85\u7684\u7279\u5f81\u4fe1\u606f\u3002<\/p>\n\n\n\n

\u5f53\u7136\uff0c\u8fd9\u53ea\u662fDecoupled Head\u2460<\/strong>\u7684\u4fe1\u606f\uff0c\u518d\u5bf9Decoupled Head\u2461\u548c\u2462<\/strong>\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

Decoupled Head\u2461\u8f93\u51fa\u7279\u5f81\u4fe1\u606f\uff0c\u5e76\u8fdb\u884cConcate\uff0c\u5f97\u523040*40*85\u7279\u5f81\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n

Decoupled Head\u2462\u8f93\u51fa\u7279\u5f81\u4fe1\u606f\uff0c\u5e76\u8fdb\u884cConcate\uff0c\u5f97\u523080*80*85\u7279\u5f81\u4fe1\u606f<\/strong>\u3002<\/p>\n\n\n\n

\u518d\u5bf9\u2460\u2461\u2462\u4e09\u4e2a\u4fe1\u606f\uff0c\u8fdb\u884cReshape\u64cd\u4f5c\uff0c\u5e76\u8fdb\u884c\u603b\u4f53\u7684Concat\uff0c\u5f97\u52308400*85\u7684\u9884\u6d4b\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n

\u5e76\u7ecf\u8fc7\u4e00\u6b21Transpose\uff0c\u53d8\u4e3a85*8400\u5927\u5c0f\u7684\u4e8c\u7ef4\u5411\u91cf\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u76848400\uff0c\u6307\u7684\u662f\u9884\u6d4b\u6846\u7684\u6570\u91cf<\/strong>\uff0c\u800c85\u662f\u6bcf\u4e2a\u9884\u6d4b\u6846\u7684\u4fe1\u606f\uff08reg\uff0cobj\uff0ccls\uff09\u3002<\/strong><\/p>\n\n\n\n

\u6709\u4e86\u9884\u6d4b\u6846\u7684\u4fe1\u606f\uff0c\u4e0b\u9762\u6211\u4eec\u518d\u4e86\u89e3\uff0c\u5982\u4f55\u5c06\u8fd9\u4e9b\u9884\u6d4b\u6846\u548c\u6807\u6ce8\u7684\u6846\uff0c\u5373groundtruth\u8fdb\u884c\u5173\u8054\uff0c\u4ece\u800c\u8ba1\u7b97Loss\u51fd\u6570\uff0c\u66f4\u65b0\u7f51\u7edc\u53c2\u6570\u5462\uff1f<\/p>\n\n\n\n

\uff082\uff09Anchor-free<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u5c31\u8981\u5f15\u5165Anchor\u7684\u5185\u5bb9\uff0c\u76ee\u524d\u884c\u4e1a\u5185\uff0c\u4e3b\u8981\u6709Anchor Based\u548cAnchor Free\u4e24\u79cd\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u5728Yolov3\u3001Yolov4\u3001Yolov5\u4e2d\uff0c\u901a\u5e38\u90fd\u662f\u91c7\u7528Anchor Based\u7684\u65b9\u5f0f<\/strong>\uff0c\u6765\u63d0\u53d6\u76ee\u6807\u6846\uff0c\u8fdb\u800c\u548c\u6807\u6ce8\u7684groundtruth\u8fdb\u884c\u6bd4\u5bf9\uff0c\u5224\u65ad\u4e24\u8005\u7684\u5dee\u8ddd\u3002<\/p>\n\n\n\n

\u2460 Anchor Based\u65b9\u5f0f<\/strong><\/p>\n\n\n\n

\u6bd4\u5982\u8f93\u5165\u56fe\u50cf\uff0c\u7ecf\u8fc7Backbone\u3001Neck\u5c42\uff0c\u6700\u7ec8\u5c06\u7279\u5f81\u4fe1\u606f\uff0c\u4f20\u9001\u5230\u8f93\u51fa\u7684Feature Map\u4e2d\u3002<\/p>\n\n\n\n

\u8fd9\u65f6\uff0c\u5c31\u8981\u8bbe\u7f6e\u4e00\u4e9bAnchor\u89c4\u5219\uff0c\u5c06\u9884\u6d4b\u6846\u548c\u6807\u6ce8\u6846\u8fdb\u884c\u5173\u8054\u3002<\/strong><\/p>\n\n\n\n

\u4ece\u800c\u5728\u8bad\u7ec3\u4e2d\uff0c\u8ba1\u7b97\u4e24\u8005\u7684\u5dee\u8ddd\uff0c\u5373\u635f\u5931\u51fd\u6570\uff0c\u518d\u66f4\u65b0\u7f51\u7edc\u53c2\u6570\u3002<\/p>\n\n\n\n

\u6bd4\u5982\u5728\u4e0b\u56fe\u7684\uff0c\u6700\u540e\u7684\u4e09\u4e2aFeature Map\u4e0a\uff0c\u57fa\u4e8e\u6bcf\u4e2a\u5355\u5143\u683c\uff0c\u90fd\u6709\u4e09\u4e2a\u4e0d\u540c\u5c3a\u5bf8\u5927\u5c0f\u7684\u951a\u6846\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u8fd9\u91cc\u4e3a\u4e86\u66f4\u5f62\u8c61\u7684\u5c55\u793a\uff0c\u4ee5\u5927\u767dYolov3\u89c6\u9891\u4e2d<\/a>\uff0c\u8f93\u5165\u56fe\u50cf\u5927\u5c0f416*416\u4e3a\u4f8b\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5f53\u8f93\u5165\u4e3a416*416\u65f6\uff0c\u7f51\u7edc\u6700\u540e\u7684\u4e09\u4e2a\u7279\u5f81\u56fe\u5927\u5c0f\u4e3a13*13\uff0c26*26\uff0c52*52\u3002<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u9ec4\u8272\u6846\u4e3a\u5c0f\u72d7\u7684Groundtruth\uff0c\u5373\u6807\u6ce8\u6846\u3002<\/p>\n\n\n\n

\u800c\u84dd\u8272\u7684\u6846\uff0c\u4e3a\u5c0f\u72d7\u4e2d\u5fc3\u70b9\u6240\u5728\u7684\u5355\u5143\u683c<\/strong>\uff0c\u6240\u5bf9\u5e94\u7684\u951a\u6846\uff0c\u6bcf\u4e2a\u5355\u5143\u683c\u90fd\u67093\u4e2a\u84dd\u6846\u3002<\/p>\n\n\n\n

\u5f53\u91c7\u7528COCO\u6570\u636e\u96c6\uff0c\u5373\u670980\u4e2a\u7c7b\u522b\u65f6\u3002<\/p>\n\n\n\n

\u57fa\u4e8e\u6bcf\u4e2a\u951a\u6846\uff0c\u90fd\u6709x\u3001y\u3001w\u3001h\u3001obj\uff08\u524d\u666f\u80cc\u666f\uff09\u3001class\uff0880\u4e2a\u7c7b\u522b\uff09\uff0c\u517185\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n

\u56e0\u6b64\u4f1a\u4ea7\u751f3*(13*13+26*26+52*52\uff09*85=904995\u4e2a\u9884\u6d4b\u7ed3\u679c\u3002<\/strong><\/p>\n\n\n\n

\u5982\u679c\u5c06\u8f93\u5165\u4ece416*416\uff0c\u53d8\u4e3a640*640\uff0c\u6700\u540e\u7684\u4e09\u4e2a\u7279\u5f81\u56fe\u5927\u5c0f\u4e3a20*20,40*40,80*80\u3002<\/strong><\/p>\n\n\n\n

\u5219\u4f1a\u4ea7\u751f3*\uff0820*20+40*40+80*80\uff09*85=2142000\u4e2a\u9884\u6d4b\u7ed3\u679c\u3002<\/strong><\/p>\n\n\n\n

\u2461 Anchor Free\u65b9\u5f0f<\/strong><\/p>\n\n\n\n

\u800cYolox-Darknet53\u4e2d\uff0c\u5219\u91c7\u7528Anchor Free\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u6211\u4eec\u4ece\u4e24\u4e2a\u65b9\u9762\uff0c\u6765\u5bf9Anchor Free\u8fdb\u884c\u4e86\u89e3\u3002<\/p>\n\n\n\n

a.\u8f93\u51fa\u7684\u53c2\u6570\u91cf<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u5148\u8ba1\u7b97\u4e0b\uff0c\u5f53\u5f97\u5230\u5305\u542b\u76ee\u6807\u6846\u6240\u6709\u8f93\u51fa\u4fe1\u606f\u65f6\uff0c\u6240\u9700\u8981\u7684\u53c2\u6570\u91cf\uff1f<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/strong><\/p>\n\n\n\n

\u6700\u540e\u9ec4\u8272\u768485*8400\uff0c\u4e0d\u662f\u7c7b\u4f3c\u4e8eYolov3\u4e2d\u7684Feature Map\uff0c\u800c\u662f\u7279\u5f81\u5411\u91cf\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4ece\u56fe\u4e2d\u53ef\u77e5\uff0c\u5f53\u8f93\u5165\u4e3a640*640<\/strong>\u65f6\uff0c\u6700\u7ec8\u8f93\u51fa\u5f97\u5230\u7684\u7279\u5f81\u5411\u91cf\u662f85*8400\u3002<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u770b\u4e0b\uff0c\u548c\u4e4b\u524dAnchor Based\u65b9\u5f0f\uff0c\u9884\u6d4b\u7ed3\u679c\u6570\u91cf\u76f8\u5dee\u591a\u5c11?<\/strong><\/p>\n\n\n\n

\u901a\u8fc7\u8ba1\u7b97\uff0c8400*85=714000\u4e2a\u9884\u6d4b\u7ed3\u679c\uff0c\u6bd4\u57fa\u4e8eAnchor Based<\/strong>\u7684\u65b9\u5f0f\uff0c\u5c11\u4e862\/3\u7684\u53c2\u6570\u91cf\u3002<\/p>\n\n\n\n

b.Anchor\u6846\u4fe1\u606f<\/strong><\/p>\n\n\n\n

\u5728\u524d\u9762Anchor Based\u4e2d\uff0c\u6211\u4eec\u77e5\u9053\uff0c\u6bcf\u4e2aFeature map\u7684\u5355\u5143\u683c\uff0c\u90fd\u67093\u4e2a\u5927\u5c0f\u4e0d\u4e00\u7684\u951a\u6846\u3002<\/p>\n\n\n\n

\u90a3\u4e48Yolox-Darknet53\u5c31\u6ca1\u6709\u5417\uff1f<\/p>\n\n\n\n

\u5176\u5b9e\u5e76\u4e0d\u7136\uff0c\u8fd9\u91cc\u53ea\u662f\u5de7\u5999\u7684\uff0c\u5c06\u524d\u9762Backbone\u4e2d\uff0c\u4e0b\u91c7\u6837\u7684\u5927\u5c0f\u4fe1\u606f\u5f15\u5165\u8fdb\u6765\u3002<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6bd4\u5982\u4e0a\u56fe\u4e2d\uff0c\u6700\u4e0a\u9762\u7684\u5206\u652f\uff0c\u4e0b\u91c7\u6837\u4e865\u6b21\uff0c2\u76845\u6b21\u65b9\u4e3a32<\/strong>\u3002<\/p>\n\n\n\n

\u5e76\u4e14Decoupled Head\u2460\u7684\u8f93\u51fa\uff0c\u4e3a20*20*85\u5927\u5c0f\u3002<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u56e0\u6b64\u5982\u4e0a\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n\n\n\n

\u6700\u540e8400\u4e2a\u9884\u6d4b\u6846\u4e2d\uff0c\u5176\u4e2d\u6709400\u4e2a\u6846\uff0c\u6240\u5bf9\u5e94\u951a\u6846\u7684\u5927\u5c0f\uff0c\u4e3a32*32\u3002<\/strong><\/p>\n\n\n\n

\u540c\u6837\u7684\u539f\u7406\uff0c\u4e2d\u95f4\u7684\u5206\u652f\uff0c\u6700\u540e\u67091600\u4e2a\u9884\u6d4b\u6846\uff0c\u6240\u5bf9\u5e94\u951a\u6846\u7684\u5927\u5c0f\uff0c\u4e3a16*16\u3002<\/strong><\/p>\n\n\n\n

\u6700\u4e0b\u9762\u7684\u5206\u652f\uff0c\u6700\u540e\u67096400\u4e2a\u9884\u6d4b\u6846\uff0c\u6240\u5bf9\u5e94\u951a\u6846\u7684\u5927\u5c0f\uff0c\u4e3a8*8\u3002<\/strong><\/p>\n\n\n\n

\u5f53\u6709\u4e868400\u4e2a\u9884\u6d4b\u6846\u7684\u4fe1\u606f<\/strong>\uff0c\u6bcf\u5f20\u56fe\u7247\u4e5f\u6709\u6807\u6ce8\u7684\u76ee\u6807\u6846\u7684\u4fe1\u606f\u3002<\/strong><\/p>\n\n\n\n

\u8fd9\u65f6\u7684\u951a\u6846\uff0c\u5c31\u76f8\u5f53\u4e8e\u6865\u6881\u3002<\/strong><\/p>\n\n\n\n

\u8fd9\u65f6\u9700\u8981\u505a\u7684\uff0c\u5c31\u662f\u5c068400\u4e2a\u951a\u6846\uff0c\u548c\u56fe\u7247\u4e0a\u6240\u6709\u7684\u76ee\u6807\u6846\u8fdb\u884c\u5173\u8054\uff0c\u6311\u9009\u51fa\u6b63\u6837\u672c\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

\u800c\u76f8\u5e94\u7684\uff0c\u6b63\u6837\u672c\u951a\u6846<\/strong>\u6240\u5bf9\u5e94\u7684\u4f4d\u7f6e\uff0c\u5c31\u53ef\u4ee5\u5c06\u6b63\u6837\u672c\u9884\u6d4b\u6846<\/strong>\uff0c\u6311\u9009\u51fa\u6765\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u91c7\u7528\u7684\u5173\u8054\u65b9\u5f0f\uff0c\u5c31\u662f\u6807\u7b7e\u5206\u914d\u3002<\/strong><\/p>\n\n\n\n

\uff083\uff09\u6807\u7b7e\u5206\u914d<\/strong><\/p>\n\n\n\n

\u5f53\u6709\u4e868400\u4e2aAnchor\u951a\u6846\u540e\uff0c\u8fd9\u91cc\u7684\u6bcf\u4e00\u4e2a\u951a\u6846\uff0c\u90fd\u5bf9\u5e9485*8400\u7279\u5f81\u5411\u91cf\u4e2d\u7684\u9884\u6d4b\u6846\u4fe1\u606f\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u9700\u8981\u77e5\u9053\uff0c\u8fd9\u4e9b\u9884\u6d4b\u6846\u53ea\u6709\u5c11\u90e8\u5206\u662f\u6b63\u6837\u672c\uff0c\u7edd\u5927\u591a\u6570\u662f\u8d1f\u6837\u672c\u3002<\/strong><\/p>\n\n\n\n

\u90a3\u4e48\u5230\u5e95\u54ea\u4e9b\u662f\u6b63\u6837\u672c\u5462\uff1f<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u9700\u8981\u5229\u7528\u951a\u6846\u548c\u5b9e\u9645\u76ee\u6807\u6846\u7684\u5173\u7cfb\uff0c\u6311\u9009\u51fa\u4e00\u90e8\u5206\u9002\u5408\u7684\u6b63\u6837\u672c\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

\u6bd4\u5982\u7b2c3\u300110\u300115\u4e2a\u951a\u6846\u662f\u6b63\u6837\u672c\u951a\u6846\uff0c\u5219\u5bf9\u5e94\u5230\u7f51\u7edc\u8f93\u51fa\u76848400\u4e2a\u9884\u6d4b\u6846\u4e2d\uff0c\u7b2c3\u300110\u300115\u4e2a\u9884\u6d4b\u6846\uff0c\u5c31\u662f\u76f8\u5e94\u7684\u6b63\u6837\u672c\u9884\u6d4b\u6846\u3002<\/strong><\/p>\n\n\n\n

\u8bad\u7ec3\u8fc7\u7a0b\u4e2d\uff0c\u5728\u951a\u6846\u7684\u57fa\u7840\u4e0a\uff0c\u4e0d\u65ad\u7684\u9884\u6d4b\uff0c\u7136\u540e\u4e0d\u65ad\u7684\u8fed\u4ee3\uff0c\u4ece\u800c\u66f4\u65b0\u7f51\u7edc\u53c2\u6570\uff0c\u8ba9\u7f51\u7edc\u9884\u6d4b\u7684\u8d8a\u6765\u8d8a\u51c6\u3002<\/p>\n\n\n\n

\u90a3\u4e48\u5728Yolox\u4e2d\uff0c\u662f\u5982\u4f55\u6311\u9009\u6b63\u6837\u672c\u951a\u6846\u7684\u5462\uff1f<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u5c31\u6d89\u53ca\u5230\u4e24\u4e2a\u5173\u952e\u70b9\uff1a\u521d\u6b65\u7b5b\u9009<\/strong>\u3001SimOTA\u3002<\/strong><\/p>\n\n\n\n

\u2460 \u521d\u6b65\u7b5b\u9009<\/strong><\/p>\n\n\n\n

\u521d\u6b65\u7b5b\u9009\u7684\u65b9\u5f0f\u4e3b\u8981\u6709\u4e24\u79cd\uff1a\u6839\u636e\u4e2d\u5fc3\u70b9\u6765\u5224\u65ad<\/strong>\u3001\u6839\u636e\u76ee\u6807\u6846\u6765\u5224\u65ad<\/strong>\uff1b<\/p>\n\n\n\n

\u8fd9\u90e8\u5206\u7684\u4ee3\u7801\uff0c\u5728models\/yolo_head.py\u7684get_in_boxes_info\u51fd\u6570\u4e2d\u3002<\/p>\n\n\n\n

a. \u6839\u636e\u4e2d\u5fc3\u70b9\u6765\u5224\u65ad\uff1a<\/strong><\/p>\n\n\n\n

\u89c4\u5219\uff1a\u5bfb\u627eanchor_box\u4e2d\u5fc3\u70b9\uff0c\u843d\u5728groundtruth_boxes\u77e9\u5f62\u8303\u56f4\u7684\u6240\u6709anchors\u3002<\/strong><\/p>\n\n\n\n

\u6bd4\u5982\u5728get_in_boxes_info\u7684\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7groundtruth\u7684[x_center,y_center\uff0cw\uff0ch]\uff0c\u8ba1\u7b97\u51fa\u6bcf\u5f20\u56fe\u7247\u7684\u6bcf\u4e2agroundtruth\u7684\u5de6\u4e0a\u89d2\u3001\u53f3\u4e0b\u89d2\u5750\u6807\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e3a\u4e86\u5927\u5bb6\u66f4\u5bb9\u6613\u7406\u89e3\uff0c\u5927\u767d\u4ee5\u4eba\u8138\u68c0\u6d4b\u7684\u4efb\u52a1\u7ed8\u5236\u56fe\u7247\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u901a\u8fc7\u4e0a\u9762\u7684\u516c\u5f0f\uff0c\u53ef\u4ee5\u5bf9\u5de6\u9762\u4eba\u8138\u56fe\u7247\uff0c\u8ba1\u7b97\u51fa\u5de6\u4e0a\u89d2\uff08gt_l\uff0cgt_t\uff09\uff0c\u53f3\u4e0b\u89d2\uff08gt_r\uff0cgt_b\uff09\u3002<\/p>\n\n\n\n

groundtruth\u7684\u77e9\u5f62\u6846\u8303\u56f4\u786e\u5b9a\u4e86\uff0c\u518d\u6839\u636e\u8303\u56f4\u53bb\u9009\u62e9\u9002\u5408\u7684\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

\u8fd9\u91cc\u518d\u7ed8\u5236\u4e00\u4e2a\u951a\u6846\u7684\u4e2d\u5fc3\u70b9\uff0c\uff08x_center\uff0cy_center\uff09\u3002<\/p>\n\n\n\n

\u800c\u53f3\u9762\u7684\u56fe\u7247\uff0c\u5c31\u662f\u5bfb\u627e\u951a\u6846\u548cgroundtruth\u7684\u5bf9\u5e94\u5173\u7cfb\u3002<\/strong><\/p>\n\n\n\n

\u5373\u8ba1\u7b97\u951a\u6846\u4e2d\u5fc3\u70b9\uff08x_center\uff0cy_center\uff09\uff0c\u548c\u4eba\u8138\u6807\u6ce8\u6846\u5de6\u4e0a\u89d2\uff08gt_l\uff0cgt_t\uff09\uff0c\u53f3\u4e0b\u89d2\uff08gt_r\uff0cgt_b\uff09\u4e24\u4e2a\u89d2\u70b9\u7684\u76f8\u5e94\u8ddd\u79bb\u3002<\/p>\n\n\n\n

\u6bd4\u5982\u4e0b\u9762\u4ee3\u7801\u56fe\u7247\u4e2d\u7684\u524d\u56db\u884c\u4ee3\u7801<\/strong>\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u800c\u5728\u7b2c\u4e94\u884c\uff0c\u5c06\u56db\u4e2a\u503c\u53e0\u52a0\u4e4b\u540e\uff0c\u901a\u8fc7\u7b2c\u516d\u884c\uff0c\u5224\u65ad\u662f\u5426\u90fd\u5927\u4e8e0\uff1f<\/strong><\/p>\n\n\n\n

\u5c31\u53ef\u4ee5\u5c06\u843d\u5728groundtruth\u77e9\u5f62\u8303\u56f4\u5185\u7684\u6240\u6709anchors\uff0c\u90fd\u63d0\u53d6\u51fa\u6765\u4e86\u3002<\/p>\n\n\n\n

\u56e0\u4e3aancor box\u7684\u4e2d\u5fc3\u70b9\uff0c\u53ea\u6709\u843d\u5728\u77e9\u5f62\u8303\u56f4\u5185\uff0c\u8fd9\u65f6\u7684b_l\uff0cb_r\uff0cb_t\uff0cb_b\u90fd\u5927\u4e8e0\u3002<\/strong><\/p>\n\n\n\n

b.\u6839\u636e\u76ee\u6807\u6846\u6765\u5224\u65ad\uff1a<\/strong><\/p>\n\n\n\n

\u9664\u4e86\u6839\u636e\u951a\u6846\u4e2d\u5fc3\u70b9\uff0c\u548cgroundtruth\u4e24\u8fb9\u8ddd\u79bb\u5224\u65ad\u7684\u65b9\u5f0f\u5916\uff0c\u4f5c\u8005\u8fd8\u8bbe\u7f6e\u4e86\u6839\u636e\u76ee\u6807\u6846\u5224\u65ad\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u89c4\u5219\uff1a\u4ee5groundtruth\u4e2d\u5fc3\u70b9\u4e3a\u57fa\u51c6\uff0c\u8bbe\u7f6e\u8fb9\u957f\u4e3a5\u7684\u6b63\u65b9\u5f62\uff0c\u6311\u9009\u5728\u6b63\u65b9\u5f62\u5185\u7684\u6240\u6709\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

\u540c\u6837\u5728get_in_boxes_info\u7684\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7groundtruth\u7684[x_center\uff0cy_center\uff0cw\uff0ch]\uff0c\u7ed8\u5236\u4e86\u4e00\u4e2a\u8fb9\u957f\u4e3a5\u7684\u6b63\u65b9\u5f62\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e3a\u4e86\u5927\u5bb6\u5bb9\u6613\u7406\u89e3\uff0c\u5927\u767d\u8fd8\u662f\u4ee5\u4eba\u8138\u68c0\u6d4b\u7684\u4efb\u52a1\u7ed8\u5236\u56fe\u7247\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5728\u5de6\u9762\u7684\u4eba\u8138\u56fe\u7247\u4e2d\uff0c\u57fa\u4e8e\u4eba\u8138\u6807\u6ce8\u6846\u7684\u4e2d\u5fc3\u70b9\uff0c\u5229\u7528\u4e0a\u9762\u7684\u516c\u5f0f\uff0c\u7ed8\u5236\u4e86\u4e00\u4e2a\u8fb9\u957f\u4e3a5\u7684\u6b63\u65b9\u5f62\u3002<\/strong>\u5de6\u4e0a\u89d2\u70b9\u4e3a\uff08gt_l\uff0cgt_t\uff09\uff0c\u53f3\u4e0b\u89d2\u70b9\u4e3a\uff08gt_r\uff0cgt_b\uff09\u3002<\/p>\n\n\n\n

\u8fd9\u65f6groundtruth\u6b63\u65b9\u5f62\u8303\u56f4\u786e\u5b9a\u4e86\uff0c\u518d\u6839\u636e\u8303\u56f4\u53bb\u6311\u9009\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

\u800c\u53f3\u9762\u7684\u56fe\u7247\uff0c\u5c31\u662f\u627e\u51fa\u6240\u6709\u4e2d\u5fc3\u70b9\uff08x_center\uff0cy_center\uff09\u5728\u6b63\u65b9\u5f62\u5185\u7684\u951a\u6846\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5728\u4ee3\u7801\u56fe\u7247\u4e2d\u7684\u524d\u56db\u884c\u4ee3\u7801\uff0c\u4e5f\u662f\u8ba1\u7b97\u951a\u6846\u4e2d\u5fc3\u70b9\uff0c\u548c\u6b63\u65b9\u5f62\u4e24\u8fb9\u7684\u8ddd\u79bb\u3002<\/p>\n\n\n\n

\u901a\u8fc7\u7b2c\u4e94\u884c\u7684\u53e0\u52a0\uff0c\u518d\u5728\u7b2c\u516d\u884c\uff0c\u5224\u65adc_l\uff0cc_r\uff0cc_t\uff0cc_b\u662f\u5426\u90fd\u5927\u4e8e0\uff1f<\/strong><\/p>\n\n\n\n

\u5c31\u53ef\u4ee5\u5c06\u843d\u5728\u8fb9\u957f\u4e3a5\u7684\u6b63\u65b9\u5f62\u8303\u56f4\u5185\uff0c\u6240\u6709\u7684anchors\uff0c\u90fd\u63d0\u53d6\u51fa\u6765\u4e86\uff0c\u56e0\u4e3a\u8fd9\u65f6\u7684c_l\uff0cc_r\uff0cc_t\uff0cc_b\u90fd\u5927\u4e8e0\u3002<\/p>\n\n\n\n

\u7ecf\u8fc7\u4e0a\u9762\u4e24\u79cd\u6311\u9009\u7684\u65b9\u5f0f\uff0c\u5c31\u5b8c\u6210\u521d\u6b65\u7b5b\u9009\u4e86\uff0c\u6311\u9009\u51fa\u4e00\u90e8\u5206\u5019\u9009\u7684anchor<\/strong>\uff0c\u8fdb\u5165\u4e0b\u4e00\u6b65\u7684\u7cbe\u7ec6\u5316\u7b5b\u9009\u3002<\/p>\n\n\n\n

\u2461 \u7cbe\u7ec6\u5316\u7b5b\u9009<\/strong><\/p>\n\n\n\n

\u800c\u5728\u7cbe\u7ec6\u5316\u7b5b\u9009\u4e2d\uff0c\u5c31\u7528\u5230\u8bba\u6587\u4e2d\u63d0\u5230\u7684SimOTA\u4e86\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4ece\u63d0\u5347\u6548\u679c\u4e0a\u6765\u770b\uff0c\u5f15\u5165SimOTA\u540e\uff0cAP\u503c\u63d0\u5347\u4e862.3\u4e2a\u767e\u5206\u70b9\uff0c\u8fd8\u662f\u975e\u5e38\u6709\u6548\u7684\u3002<\/p>\n\n\n\n

\u800cSimOAT\u65b9\u6cd5\u7684\u63d0\u51fa\uff0c\u4e3b\u8981\u6765\u6e90\u4e8e\u65f7\u89c6\u79d1\u6280\uff0c2021\u5e74\u521dCVPR\u4e0a\u7684\u4e00\u7bc7\u8bba\u6587\uff1a\u300aOta: Optimal transport assignment for object detection\u300b<\/a>\u3002<\/p>\n\n\n\n

\u6211\u4eec\u5c06SimOTA\u7684\u524d\u540e\u6d41\u7a0b\u8fdb\u884c\u62c6\u89e3\uff0c\u770b\u4e00\u4e0b\u662f\u5982\u4f55\u8fdb\u884c\u7cbe\u7ec6\u5316\u7b5b\u9009\u7684\uff1f<\/p>\n\n\n\n

\u6574\u4e2a\u7b5b\u9009\u6d41\u7a0b\uff0c\u4e3b\u8981\u5206\u4e3a\u56db\u4e2a\u9636\u6bb5\uff1a<\/p>\n\n\n\n

a.\u521d\u7b5b\u6b63\u6837\u672c\u4fe1\u606f\u63d0\u53d6<\/strong><\/p>\n\n\n\n

b.Loss\u51fd\u6570\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

c.cost\u6210\u672c\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

d.SimOTA\u6c42\u89e3<\/strong><\/p>\n\n\n\n

\u4e3a\u4e86\u4fbf\u4e8e\u7406\u89e3\uff0c\u6211\u4eec\u5047\u5b9a\u56fe\u7247\u4e0a\u67093\u4e2a\u76ee\u6807\u6846\uff0c\u53733\u4e2agroundtruth\u3002<\/strong><\/p>\n\n\n\n

\u518d\u5047\u5b9a\u76ee\u524d\u5728\u505a\u7684\u9879\u76ee\u662f\u5bf9\u4eba\u8138\u548c\u4eba\u4f53\u68c0\u6d4b\uff0c\u56e0\u6b64\u68c0\u6d4b\u7c7b\u522b\u662f2\u3002<\/strong><\/p>\n\n\n\n

\u4e0a\u4e00\u8282\u4e2d\uff0c\u6211\u4eec\u77e5\u9053\u67098400\u4e2a\u951a\u6846\uff0c\u4f46\u662f\u7ecf\u8fc7\u521d\u6b65\u7b5b\u9009\u540e\uff0c\u5047\u5b9a\u67091000\u4e2a\u951a\u6846\u662f\u6b63\u6837\u672c\u951a\u6846\u3002<\/strong><\/p>\n\n\n\n

a.\u521d\u7b5b\u6b63\u6837\u672c\u4fe1\u606f\u63d0\u53d6<\/strong><\/p>\n\n\n\n

\u521d\u7b5b\u51fa\u76841000\u4e2a\u6b63\u6837\u672c\u951a\u6846\u7684\u4f4d\u7f6e\uff0c\u6211\u4eec\u662f\u77e5\u9053\u7684\u3002<\/p>\n\n\n\n

\u800c\u6240\u6709\u951a\u6846\u7684\u4f4d\u7f6e<\/strong>\uff0c\u548c\u7f51\u7edc\u6700\u540e\u8f93\u51fa\u768485*8400\u7279\u5f81\u5411\u91cf<\/strong>\u662f\u4e00\u4e00\u5bf9\u5e94\u3002<\/p>\n\n\n\n

\u6240\u4ee5\u6839\u636e\u4f4d\u7f6e\uff0c\u53ef\u4ee5\u5c06\u7f51\u7edc\u9884\u6d4b\u7684\u5019\u9009\u68c0\u6d4b\u6846\u4f4d\u7f6ebboxes_preds<\/strong>\u3001\u524d\u666f\u80cc\u666f\u76ee\u6807\u5206\u6570obj_preds<\/strong>\u3001\u7c7b\u522b\u5206\u6570cls_preds\u7b49\u4fe1\u606f<\/strong>\uff0c\u63d0\u53d6\u51fa\u6765\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e0a\u9762\u7684\u4ee3\u7801\u4f4d\u4e8eyolo_head.py\u7684get_assignments\u51fd\u6570\u4e2d\u3002<\/p>\n\n\n\n

\u4ee5\u524d\u9762\u7684\u5047\u5b9a\u4fe1\u606f\u4e3a\u4f8b\uff0c\u4ee3\u7801\u56fe\u7247\u4e2d\u7684bboxes_preds_per_image<\/strong>\u56e0\u4e3a\u662f\u5019\u9009\u68c0\u6d4b\u6846\u7684\u4fe1\u606f\uff0c\u56e0\u6b64\u7ef4\u5ea6\u4e3a[1000\uff0c4]<\/strong>\u3002<\/p>\n\n\n\n

obj_preds<\/strong>\u56e0\u4e3a\u662f\u76ee\u6807\u5206\u6570\uff0c\u6240\u4ee5\u7ef4\u5ea6\u662f[1000\uff0c1]<\/strong>\u3002<\/p>\n\n\n\n

cls_preds<\/strong>\u56e0\u4e3a\u662f\u7c7b\u522b\u5206\u6570\uff0c\u6240\u4ee5\u7ef4\u5ea6\u662f[1000\uff0c2]<\/strong>\u3002<\/p>\n\n\n\n

b.Loss\u51fd\u6570\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

\u9488\u5bf9\u7b5b\u9009\u51fa\u76841000\u4e2a\u5019\u9009\u68c0\u6d4b\u6846<\/strong>\uff0c\u548c3\u4e2agroundtruth<\/strong>\u8ba1\u7b97Loss\u51fd\u6570\u3002<\/p>\n\n\n\n

\u8ba1\u7b97\u7684\u4ee3\u7801\uff0c\u4e5f\u5728yolo_head.py\u7684get_assignments\u51fd\u6570\u4e2d\u3002<\/p>\n\n\n\n

\u9996\u5148\u662f\u4f4d\u7f6e\u4fe1\u606f\u7684loss\u503c\uff1apair_wise_ious_loss<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u901a\u8fc7\u7b2c\u4e00\u884c\u4ee3\u7801\uff0c\u53ef\u4ee5\u8ba1\u7b97\u51fa3\u4e2a\u76ee\u6807\u6846<\/strong>\uff0c\u548c1000\u4e2a\u5019\u9009\u6846<\/strong>\uff0c\u6bcf\u4e2a\u6846\u76f8\u4e92\u4e4b\u95f4\u7684iou\u4fe1\u606fpair_wise_ious<\/strong>\uff0c\u56e0\u4e3a\u5411\u91cf\u7ef4\u5ea6\u4e3a[3,1000]\u3002<\/p>\n\n\n\n

\u518d\u901a\u8fc7-torch.log\u8ba1\u7b97\uff0c\u5f97\u5230\u4f4d\u7f6e\u635f\u5931<\/strong>\uff0c\u5373\u4ee3\u7801\u4e2d\u7684pair_wise_iou_loss\u3002<\/strong><\/p>\n\n\n\n

\u7136\u540e\u662f\u7efc\u5408\u7c7b\u522b\u4fe1\u606f\u548c\u76ee\u6807\u4fe1\u606f\u7684loss\u503c\uff1apair_wise_cls_loss<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u901a\u8fc7\u7b2c\u4e00\u884c\u4ee3\u7801\uff0c\u5c06\u7c7b\u522b\u7684\u6761\u4ef6\u6982\u7387\u548c\u76ee\u6807\u7684\u5148\u9a8c\u6982\u7387\u505a\u4e58\u79ef\uff0c\u5f97\u5230\u76ee\u6807\u7684\u7c7b\u522b\u5206\u6570\u3002<\/p>\n\n\n\n

\u518d\u901a\u8fc7\u7b2c\u4e8c\u884c\u4ee3\u7801\uff0cF.binary_cross_entroy\u7684\u5904\u7406\uff0c\u5f97\u52303\u4e2a\u76ee\u6807\u6846\u548c1000\u4e2a\u5019\u9009\u6846\u7684\u7efc\u5408loss\u503c\uff0c\u5373pair_wise_cls_loss\uff0c<\/strong>\u5411\u91cf\u7ef4\u5ea6\u4e3a[3\uff0c1000]\u3002<\/p>\n\n\n\n

c.cost\u6210\u672c\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

\u6709\u4e86reg_loss\u548ccls_loss\uff0c\u5c31\u53ef\u4ee5\u5c06\u4e24\u4e2a\u635f\u5931\u51fd\u6570\u52a0\u6743\u76f8\u52a0\uff0c\u8ba1\u7b97cost\u6210\u672c\u51fd\u6570<\/strong>\u4e86\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u6d89\u53ca\u5230\u8bba\u6587\u4e2d\u63d0\u5230\u7684\u4e00\u4e2a\u516c\u5f0f\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u76f8\u5e94\u7684\uff0c\u5bf9\u5e94\u4e8eyolo_head.py\u7684get_assignments\u51fd\u6570\u4e2d\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u53ef\u4ee5\u770b\u51fa\uff0c\u516c\u5f0f\u4e2d\u7684\u52a0\u6743\u7cfb\u6570\uff0c\u5373\u4ee3\u7801\u4e2d\u76843\u3002<\/strong><\/p>\n\n\n\n

d.SimOTA<\/strong><\/p>\n\n\n\n

\u6709\u4e86\u4e0a\u9762\u7684\u4e00\u7cfb\u5217\u4fe1\u606f\uff0c\u6807\u7b7e\u5206\u914d\u95ee\u9898\uff0c\u5c31\u8f6c\u6362\u4e3a\u4e86\u6807\u51c6\u7684OTA\u95ee\u9898\u3002<\/p>\n\n\n\n

\u4f46\u662f\u7ecf\u5178\u7684Sinkhorn-Knopp\u7b97\u6cd5\uff0c\u9700\u8981\u591a\u6b21\u8fed\u4ee3\u6c42\u5f97\u6700\u4f18\u89e3\u3002<\/p>\n\n\n\n

\u4f5c\u8005\u4e5f\u63d0\u5230\uff0c\u8be5\u7b97\u6cd5\u4f1a\u5bfc\u81f425%\u989d\u5916\u8bad\u7ec3\u65f6\u95f4\uff0c\u6240\u4ee5\u91c7\u7528\u4e00\u79cd\u7b80\u5316\u7248\u7684SimOTA\u65b9\u6cd5<\/strong>\uff0c\u6c42\u89e3\u8fd1\u4f3c\u6700\u4f18\u89e3\u3002\u8fd9\u91cc\u5bf9\u5e94\u7684\u51fd\u6570\uff0c\u662fget_assignments\u51fd\u6570\u4e2d\u7684self.dynamic_k_matching\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u5176\u4e2d\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n

\u7b2c\u4e00\u6b65\uff1a\u8bbe\u7f6e\u5019\u9009\u6846\u6570\u91cf<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u9996\u5148\u6309\u7167cost\u503c\u7684\u5927\u5c0f\uff0c\u65b0\u5efa\u4e00\u4e2a\u51680\u53d8\u91cfmatching_matrix\uff0c\u8fd9\u91cc\u662f[3,1000]\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u901a\u8fc7\u4e0a\u9762\u7b2c\u4e8c\u884c\u4ee3\u7801\uff0c\u8bbe\u7f6e\u5019\u9009\u6846\u6570\u91cf\u4e3a10\u3002<\/p>\n\n\n\n

\u518d\u901a\u8fc7\u7b2c\u4e09\u884c\u4ee3\u7801\uff0c\u4ece\u524d\u9762\u7684pair_wise_ious\u4e2d\uff0c\u7ed9\u6bcf\u4e2a\u76ee\u6807\u6846\uff0c\u6311\u900910\u4e2aiou\u6700\u5927\u7684\u5019\u9009\u6846\u3002<\/strong><\/p>\n\n\n\n

\u56e0\u4e3a\u524d\u9762\u5047\u5b9a\u67093\u4e2a\u76ee\u6807\uff0c\u56e0\u6b64\u8fd9\u91cctopk_ious\u7684\u7ef4\u5ea6\u4e3a[3\uff0c10]\u3002<\/p>\n\n\n\n

\u7b2c\u4e8c\u6b65\uff1a\u901a\u8fc7cost\u6311\u9009\u5019\u9009\u6846<\/strong><\/p>\n\n\n\n

\u4e0b\u9762\u518d\u901a\u8fc7topk_ious\u7684\u4fe1\u606f\uff0c\u52a8\u6001\u9009\u62e9\u5019\u9009\u6846\uff0c\u8fd9\u91cc\u662f\u4e2a\u5173\u952e\u3002<\/strong><\/p>\n\n\n\n

\u4ee3\u7801\u5982dynamic_k_matching\u51fd\u6570\u4e2d\uff0c\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u4e3a\u4e86\u4fbf\u4e8e\u5927\u5bb6\u7406\u89e3\uff0c\u5927\u767d\u5148\u628a\u7b2c\u4e00\u884c\u5236\u4f5c\u6210\u56fe\u793a\u6548\u679c\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u7684topk_ious\uff0c\u662f3\u4e2a\u76ee\u6807\u6846\u548c\u9884\u6d4b\u6846\u4e2d\uff0c\u6700\u5927iou\u768410\u4e2a\u5019\u9009\u6846\uff1a<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u7ecf\u8fc7torch.clamp\u51fd\u6570\uff0c\u5f97\u5230\u6700\u7ec8\u53f3\u9762\u7684dynamic_ks\u503c\u3002<\/p>\n\n\n\n

\u6211\u4eec\u5c31\u77e5\u9053\uff0c\u76ee\u6807\u68461\u548c3\uff0c\u7ed9\u4ed6\u5206\u914d3\u4e2a\u5019\u9009\u6846\uff0c\u800c\u76ee\u6807\u68462\uff0c\u7ed9\u5b83\u5206\u914d4\u4e2a\u5019\u9009\u6846\u3002<\/p>\n\n\n\n

\u90a3\u4e48\u57fa\u4e8e\u4ec0\u4e48\u6807\u51c6\u5206\u914d\u5462\uff1f<\/strong><\/p>\n\n\n\n

\u8fd9\u65f6\u5c31\u8981\u5229\u7528\u524d\u9762\u8ba1\u7b97\u7684cost\u503c\uff0c\u5373[3,1000]\u7684\u635f\u5931\u51fd\u6570\u52a0\u6743\u4fe1\u606f\u3002<\/p>\n\n\n\n

\u5728for\u5faa\u73af\u4e2d\uff0c\u9488\u5bf9\u6bcf\u4e2a\u76ee\u6807\u6846\u6311\u9009\uff0c\u76f8\u5e94\u7684cost\u503c\u6700\u4f4e\u7684\u4e00\u4e9b\u5019\u9009\u6846\u3002<\/strong><\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6bd4\u5982\u53f3\u9762\u7684matching_matrix\u4e2d\uff0ccost\u503c\u6700\u4f4e\u7684\u4e00\u4e9b\u4f4d\u7f6e\uff0c\u6570\u503c\u4e3a1\uff0c\u5176\u4f59\u4f4d\u7f6e\u90fd\u4e3a0\u3002<\/p>\n\n\n\n

\u56e0\u4e3a\u76ee\u6807\u68461\u548c3\uff0cdynamic_ks\u503c\u90fd\u4e3a3\uff0c\u56e0\u6b64matching_matrix\u7684\u7b2c\u4e00\u884c\u548c\u7b2c\u4e09\u884c\uff0c\u67093\u4e2a1\u3002<\/p>\n\n\n\n

\u800c\u76ee\u6807\u68462\uff0cdynamic_ks\u503c\u4e3a4\uff0c\u56e0\u6b64matching_matrix\u7684\u7b2c\u4e8c\u884c\uff0c\u67094\u4e2a1\u3002<\/p>\n\n\n\n

\u7b2c\u4e09\u6b65\uff1a\u8fc7\u6ee4\u5171\u7528\u7684\u5019\u9009\u6846<\/strong><\/p>\n\n\n\n

\u4e0d\u8fc7\u5728\u5206\u6790matching_matrix\u65f6\uff0c\u6211\u4eec\u53d1\u73b0\uff0c\u7b2c5\u5217\u6709\u4e24\u4e2a1\u3002<\/p>\n\n\n\n

\u8fd9\u4e5f\u5c31\u8bf4\u660e\uff0c\u7b2c\u4e94\u5217\u6240\u5bf9\u5e94\u7684\u5019\u9009\u6846\uff0c\u88ab\u76ee\u6807\u68c0\u6d4b\u68461\u548c2\uff0c\u90fd\u8fdb\u884c\u5173\u8054\u3002<\/p>\n\n\n\n

\u56e0\u6b64\u5bf9\u8fd9\u4e24\u4e2a\u4f4d\u7f6e\uff0c\u8fd8\u8981\u4f7f\u7528cost\u503c\u8fdb\u884c\u5bf9\u6bd4\uff0c\u9009\u62e9\u8f83\u5c0f\u7684\u503c<\/strong>\uff0c\u518d\u8fdb\u4e00\u6b65\u7b5b\u9009\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u8fd9\u91cc\u4e3a\u4e86\u4fbf\u4e8e\u7406\u89e3\uff0c\u8fd8\u662f\u91c7\u7528\u56fe\u793a\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n

\u9996\u5148\u7b2c\u4e00\u884c\u4ee3\u7801\uff0c\u5c06matching_matrix\uff0c\u5bf9\u6bcf\u4e00\u5217\u8fdb\u884c\u76f8\u52a0\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u8fd9\u65f6anchor_matching_gt\u4e2d\uff0c\u53ea\u8981\u6709\u5927\u4e8e1\u7684\uff0c\u8bf4\u660e\u6709\u5171\u7528\u7684\u60c5\u51b5\u3002<\/strong><\/p>\n\n\n\n

\u4e0a\u56fe\u6848\u4f8b\u4e2d\uff0c\u8868\u660e\u7b2c5\u5217\u5b58\u5728\u5171\u7528\u7684\u60c5\u51b5\u3002<\/strong><\/p>\n\n\n\n

\u518d\u5229\u7528\u7b2c\u4e09\u884c\u4ee3\u7801\uff0c\u5c06cost\u4e2d\uff0c\u7b2c5\u5217\u7684\u503c\u53d6\u51fa\uff0c\u5e76\u8fdb\u884c\u6bd4\u8f83\uff0c\u8ba1\u7b97\u6700\u5c0f\u503c\u6240\u5bf9\u5e94\u7684\u884c\u6570\uff0c\u4ee5\u53ca\u5206\u6570\u3002<\/p>\n\n\n\n

\u6211\u4eec\u5c06\u7b2c5\u5217\u4e24\u4e2a\u4f4d\u7f6e\uff0c\u5047\u8bbe\u4e3a0.4\u548c0.3\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u7ecf\u8fc7\u7b2c\u4e09\u884c\u4ee3\u7801\uff0c\u53ef\u4ee5\u627e\u5230\u6700\u5c0f\u7684\u503c\u662f0.3\uff0c\u5373cost_min\u4e3a0.3\uff0c\u6240\u5bf9\u5e94\u7684\u884c\u6570\uff0ccost_argmin\u4e3a2\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u7ecf\u8fc7\u7b2c\u56db\u884c\u4ee3\u7801\uff0c\u5c06matching_matrix\u7b2c5\u5217\u90fd\u7f6e0\u3002<\/p>\n\n\n\n

\u518d\u5229\u7528\u7b2c\u4e94\u884c\u4ee3\u7801\uff0c\u5c06matching_matrix\u7b2c2\u884c\uff0c\u7b2c5\u5217\u7684\u4f4d\u7f6e\u53d8\u4e3a1\u3002<\/p>\n\n\n\n

\u6700\u7ec8\u6211\u4eec\u53ef\u4ee5\u5f97\u52303\u4e2a\u76ee\u6807\u6846\uff0c\u6700\u5408\u9002\u7684\u4e00\u4e9b\u5019\u9009\u6846\uff0c\u5373matching_matrix\u4e2d\uff0c\u6240\u67091\u6240\u5bf9\u5e94\u7684\u4f4d\u7f6e\u3002<\/strong><\/p>\n\n\n\n

\uff084\uff09Loss\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

\u7ecf\u8fc7\u7b2c\u4e09\u90e8\u5206\u7684\u6807\u7b7e\u5206\u914d\uff0c\u5c31\u53ef\u4ee5\u5c06\u76ee\u6807\u6846\u548c\u6b63\u6837\u672c\u9884\u6d4b\u6846\u5bf9\u5e94\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n

\u4e0b\u9762\u5c31\u53ef\u4ee5\u8ba1\u7b97\u4e24\u8005\u7684\u8bef\u5dee\uff0c\u5373Loss\u51fd\u6570\u3002<\/p>\n\n\n\n

\u8ba1\u7b97\u7684\u4ee3\u7801\uff0c\u4f4d\u4e8eyolo_head.py\u7684get_losses\u51fd\u6570\u4e2d\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff1a<\/p>\n\n\n\n

\u68c0\u6d4b\u6846\u4f4d\u7f6e\u7684iou_loss\uff0cYolox\u4e2d\u4f7f\u7528\u4f20\u7edf\u7684iou_loss\uff0c\u548cgiou_loss\u4e24\u79cd\uff0c\u53ef\u4ee5\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n\n\n\n

\u800cobj_loss\u548ccls_loss\uff0c\u90fd\u662f\u91c7\u7528BCE_loss\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n

\u5f53\u7136\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u4e24\u70b9\u9700\u8981\u6ce8\u610f<\/strong>\uff1a<\/p>\n\n\n\n

a.\u5728\u524d\u9762\u7cbe\u7ec6\u5316\u7b5b\u9009\u4e2d\uff0c\u4f7f\u7528\u4e86reg_loss\u548ccls_loss\uff0c\u7b5b\u9009\u51fa\u548c\u76ee\u6807\u6846\u6240\u5bf9\u5e94\u7684\u9884\u6d4b\u6846\u3002<\/p>\n\n\n\n

\u56e0\u6b64\u8fd9\u91cc\u7684iou_loss\u548ccls_loss\uff0c\u53ea\u9488\u5bf9\u76ee\u6807\u6846\u548c\u7b5b\u9009\u51fa\u7684\u6b63\u6837\u672c\u9884\u6d4b\u6846\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n\n\n\n

\u800cobj_loss\uff0c\u5219\u8fd8\u662f\u9488\u5bf98400\u4e2a\u9884\u6d4b\u6846\u3002<\/p>\n\n\n\n

b.\u5728Decoupled Head\u4e2d\uff0ccls_output<\/strong>\u548cobj_output<\/strong>\u4f7f\u7528\u4e86sigmoid\u51fd\u6570\u8fdb\u884c\u5f52\u4e00\u5316\uff0c<\/p>\n\n\n\n

\u4f46\u662f\u5728\u8bad\u7ec3\u65f6\uff0c\u5e76\u6ca1\u6709\u4f7f\u7528sigmoid\u51fd\u6570\uff0c\u539f\u56e0\u662f\u8bad\u7ec3\u65f6\u7528\u7684nn.BCEWithLogitsLoss\u51fd\u6570<\/strong>\uff0c\u5df2\u7ecf\u5305\u542b\u4e86sigmoid\u64cd\u4f5c\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u800c\u5728\u63a8\u7406\u8fc7\u7a0b\u4e2d\uff0c\u662f\u4f7f\u7528Sigmoid\u51fd\u6570\u7684\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6587\u7ae0\u6765\u6e90\uff1ahttps:\/\/zhuanlan.zhihu.com\/p\/397993315<\/p>\n","protected":false},"excerpt":{"rendered":"

https:\/\/yolox.readthedocs.io\/en\/latest\/quick_run.html \u8bba … \u7ee7\u7eed\u9605\u8bfbYOLOX: Exceeding YOLO Series in 2021<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[25],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/4954"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=4954"}],"version-history":[{"count":14,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/4954\/revisions"}],"predecessor-version":[{"id":4970,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/4954\/revisions\/4970"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=4954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=4954"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=4954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}