{"id":6758,"date":"2022-08-31T16:50:00","date_gmt":"2022-08-31T08:50:00","guid":{"rendered":"http:\/\/139.9.1.231\/?p=6758"},"modified":"2022-11-29T15:12:37","modified_gmt":"2022-11-29T07:12:37","slug":"r-cnn","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/08\/31\/r-cnn\/","title":{"rendered":"\u533a\u57df\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\uff08R-CNN\uff09\u7cfb\u5217"},"content":{"rendered":"\n<p>\u6765\u81ea\uff1a<em><a href=\"https:\/\/github.com\/d2l-ai\/d2l-zh\" target=\"_blank\" rel=\"noreferrer noopener\">\u52a8\u624b\u5b66\u6df1\u5ea6\u5b66\u4e60<\/a><\/em><\/p>\n\n\n\n<p class=\"has-bright-blue-background-color has-background\"><strong><em>\u89c6\u9891\u8bb2\u89e3\uff1a<a rel=\"noreferrer noopener\" href=\"https:\/\/www.bilibili.com\/video\/BV1af4y1m7iL\/?spm_id_from=333.337.search-card.all.click\" target=\"_blank\">Faster R-CNN<\/a>\u539f\u7406 \u3001<a href=\"https:\/\/www.bilibili.com\/video\/BV1of4y1m7nj\/?spm_id_from=333.788.recommend_more_video.0\" data-type=\"URL\" data-id=\"https:\/\/www.bilibili.com\/video\/BV1of4y1m7nj\/?spm_id_from=333.788.recommend_more_video.0\" target=\"_blank\" rel=\"noreferrer noopener\">\u6e90\u7801\u89e3\u6790<\/a><\/em><\/strong><\/p>\n\n\n\n<p>1\u3001R-CNN<\/p>\n\n\n\n<p>R-CNN \u2fb8\u5148\u4ece\u8f93\u2f0a\u56fe\u50cf\u4e2d\u9009\u53d6\u82e5\u2f32\uff08\u4f8b\u59822000\u4e2a\uff09\u63d0\u8bae\u533a\u57df\uff08\u5982\u951a\u6846\u4e5f\u662f\u2f00\u79cd\u9009\u53d6\u65b9\u6cd5\uff09\uff0c\u5e76\u6807\u6ce8\u5b83\u4eec\u7684\u7c7b\u522b\u548c\u8fb9\u754c\u6846\uff08\u5982\u504f\u79fb\u91cf\uff09\u3002[Girshick et al., 2014] \u7136\u540e\uff0c\u2f64\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u5bf9\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u8fdb\u2f8f\u524d\u5411\u8ba1\u7b97\u4ee5\u62bd\u53d6\u5176\u7279\u5f81\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u2f64\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u7684\u7279\u5f81\u6765\u9884\u6d4b\u7c7b\u522b\u548c\u8fb9\u754c\u6846\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" src=\"https:\/\/miro.medium.com\/max\/556\/1*NX5yYTi-eQjP0pMWs3UbUg.png\" alt=\"\" width=\"353\" height=\"316\"\/><\/figure><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"325\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-465-1024x325.png\" alt=\"\" class=\"wp-image-6761\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-465-1024x325.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-465-300x95.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-465-768x244.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-465.png 1221w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u5177\u4f53\u6765\u8bf4\uff0cR-CNN\u5305\u62ec\u4ee5\u4e0b\u56db\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ol><li>\u5bf9\u8f93\u2f0a\u56fe\u50cf\u4f7f\u2f64 \u9009\u62e9\u6027\u641c\u7d22\u6765\u9009\u53d6\u591a\u4e2a\u2fbc\u8d28\u91cf\u7684\u63d0\u8bae\u533a\u57df [Uijlings et al., 2013] \u3002\u8fd9\u4e9b\u63d0\u8bae\u533a\u57df\u901a\u5e38\u662f\u5728\u591a\u4e2a\u5c3a\u5ea6\u4e0b\u9009\u53d6\u7684\uff0c\u5e76\u5177\u6709\u4e0d\u540c\u7684\u5f62\u72b6\u548c\u2f24\u5c0f\u3002\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u90fd\u5c06\u88ab\u6807\u6ce8\u7c7b\u522b\u548c\u771f\u5b9e\u8fb9\u754c\u6846\u3002<\/li><li>\u9009\u62e9\u2f00\u4e2a\u9884\u8bad\u7ec3\u7684\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\uff0c\u5e76\u5c06\u5176\u5728\u8f93\u51fa\u5c42\u4e4b\u524d\u622a\u65ad\u3002\u5c06\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u53d8\u5f62\u4e3a\u2f79\u7edc\u9700\u8981\u7684\u8f93\u2f0a\u5c3a\u2f28\uff0c\u5e76\u901a\u8fc7\u524d\u5411\u8ba1\u7b97\u8f93\u51fa\u62bd\u53d6\u7684\u63d0\u8bae\u533a\u57df\u7279\u5f81\u3002<\/li><li>\u5c06\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u7684\u7279\u5f81\u8fde\u540c\u5176\u6807\u6ce8\u7684\u7c7b\u522b\u4f5c\u4e3a\u2f00\u4e2a\u6837\u672c\u3002\u8bad\u7ec3\u591a\u4e2a\u2f40\u6301\u5411\u91cf\u673a\u5bf9\u2f6c\u6807\u5206\u7c7b\uff0c\u5176\u4e2d\u6bcf\u4e2a\u2f40\u6301\u5411\u91cf\u673a\u2f64\u6765\u5224\u65ad\u6837\u672c\u662f\u5426\u5c5e\u4e8e\u67d0\u2f00\u4e2a\u7c7b\u522b\u3002<\/li><li>\u5c06\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\u7684\u7279\u5f81\u8fde\u540c\u5176\u6807\u6ce8\u7684\u8fb9\u754c\u6846\u4f5c\u4e3a\u2f00\u4e2a\u6837\u672c\uff0c\u8bad\u7ec3\u7ebf\u6027\u56de\u5f52\u6a21\u578b\u6765\u9884\u6d4b\u771f\u5b9e\u8fb9\u754c\u6846\u3002<\/li><\/ol>\n\n\n\n<ul id=\"block-dbd31c5e-375f-4cd1-8d52-83d5e8ebd490\"><li>\u5c3d\u7ba1 R-CNN \u6a21\u578b\u901a\u8fc7\u9884\u8bad\u7ec3\u7684\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u6709\u6548\u5730\u62bd\u53d6\u4e86\u56fe\u50cf\u7279\u5f81\uff0c\u4f46\u5b83\u7684\u901f\u5ea6\u5f88\u6162\u3002\u60f3\u8c61\u2f00\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u4ece\u2f00\u5f20\u56fe\u50cf\u4e2d\u9009\u51fa\u4e0a\u5343\u4e2a\u63d0\u8bae\u533a\u57df\uff0c\u8fd9\u9700\u8981\u4e0a\u5343\u6b21\u7684\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u524d\u5411\u8ba1\u7b97\u6765\u6267\u2f8f\u2f6c\u6807\u68c0\u6d4b\u3002\u8fd9\u79cd\u5e9e\u2f24\u7684\u8ba1\u7b97\u91cf\u4f7f\u5f97 R-CNN \u5728\u73b0\u5b9e\u4e16\u754c\u4e2d\u96be\u4ee5\u88ab\u2f34\u6cdb\u5e94\u2f64\u3002<\/li><\/ul>\n\n\n\n<p>2\u3001Fast R-CNN<\/p>\n\n\n\n<p>R-CNN \u7684\u4e3b\u8981\u6027\u80fd\u74f6\u9888\u5728\u4e8e\uff0c\u5bf9\u6bcf\u4e2a\u63d0\u8bae\u533a\u57df\uff0c\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u524d\u5411\u8ba1\u7b97\u662f\u72ec\u2f74\u7684\uff0c\u800c\u6ca1\u6709\u5171\u4eab\u8ba1\u7b97\u3002\u7531\u4e8e\u8fd9\u4e9b\u533a\u57df\u901a\u5e38\u6709\u91cd\u53e0\uff0c\u72ec\u2f74\u7684\u7279\u5f81\u62bd\u53d6\u4f1a\u5bfc\u81f4\u91cd\u590d\u7684\u8ba1\u7b97\u3002Fast R-CNN [Girshick, 2015] \u5bf9 R-CNN \u7684\u4e3b\u8981\u6539\u8fdb\u4e4b\u2f00\uff0c\u662f\u4ec5\u5728\u6574\u5f20\u56fe\u8c61\u4e0a\u6267\u2f8f\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u524d\u5411\u8ba1\u7b97\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/miro.medium.com\/max\/700\/1*0pMP3aY8blSpva5tvWbnKA.png\" alt=\"\"\/><\/figure>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" width=\"788\" height=\"675\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-466.png\" alt=\"\" class=\"wp-image-6765\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-466.png 788w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-466-300x257.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-466-768x658.png 768w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/figure><\/div>\n\n\n\n<p>\u5b83\u7684\u4e3b\u8981\u8ba1\u7b97\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol><li>\u4e0e R-CNN \u76f8\u2f50\uff0cFast R-CNN \u2f64\u6765\u63d0\u53d6\u7279\u5f81\u7684\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u8f93\u2f0a\u662f\u6574\u4e2a\u56fe\u50cf\uff0c\u800c\u4e0d\u662f\u5404\u4e2a\u63d0\u8bae\u533a\u57df\u3002\u6b64\u5916\uff0c\u8fd9\u4e2a\u2f79\u7edc\u901a\u5e38\u4f1a\u53c2\u4e0e\u8bad\u7ec3\u3002\u8bbe\u8f93\u2f0a\u4e3a\u2f00\u5f20\u56fe\u50cf\uff0c\u5c06\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u8f93\u51fa\u7684\u5f62\u72b6\u8bb0\u4e3a 1\u00d7c\u00d7h1\u00d7w1\u3002<\/li><li><strong>\u5047\u8bbe\u9009\u62e9\u6027\u641c\u7d22\u2f63\u6210\u4e86n\u4e2a\u63d0\u8bae\u533a\u57df\u3002\u8fd9\u4e9b\u5f62\u72b6\u5404\u5f02\u7684\u63d0\u8bae\u533a\u57df\u5728\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u8f93\u51fa\u4e0a\u5206\u522b\u6807\u51fa\u4e86\u5f62\u72b6\u5404\u5f02\u7684\u5174\u8da3\u533a\u57df\u3002\u7136\u540e\uff0c\u8fd9\u4e9b\u611f\u5174\u8da3\u7684\u533a\u57df\u9700\u8981\u8fdb\u2f00\u6b65\u62bd\u53d6\u51fa\u5f62\u72b6\u76f8\u540c\u7684\u7279\u5f81\uff08\u2f50\u5982\u6307\u5b9a\u2fbc\u5ea6h2\u548c\u5bbd\u5ea6w2\uff09\uff0c\u4ee5\u4fbf\u4e8e\u8fde\u7ed3\u540e\u8f93\u51fa\u3002\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u2f00\u2f6c\u6807\uff0cFast R-CNN \u5f15\u2f0a\u4e86 <a href=\"https:\/\/zhuanlan.zhihu.com\/p\/65423423\" target=\"_blank\" rel=\"noreferrer noopener\">\u5174\u8da3\u533a\u57df (RoI) \u6c60\u5316\u5c42<\/a>\uff1a\u5c06\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u8f93\u51fa\u548c\u63d0\u8bae\u533a\u57df\u4f5c\u4e3a\u8f93\u2f0a\uff0c\u8f93\u51fa\u8fde\u7ed3\u540e\u7684\u5404\u4e2a\u63d0\u8bae\u533a\u57df\u62bd\u53d6\u7684\u7279\u5f81\uff0c\u5f62\u72b6\u4e3an \u00d7 c \u00d7 h2 \u00d7 w2\u3002<\/strong><\/li><li>\u901a\u8fc7\u5168\u8fde\u63a5\u5c42\u5c06\u8f93\u51fa\u5f62\u72b6\u53d8\u6362\u4e3an \u00d7 d\uff0c\u5176\u4e2d\u8d85\u53c2\u6570d\u53d6\u51b3\u4e8e\u6a21\u578b\u8bbe\u8ba1\u3002<\/li><li>\u9884\u6d4bn\u4e2a\u63d0\u8bae\u533a\u57df\u4e2d\u6bcf\u4e2a\u533a\u57df\u7684\u7c7b\u522b\u548c\u8fb9\u754c\u6846\u3002\u66f4\u5177\u4f53\u5730\u8bf4\uff0c\u5728\u9884\u6d4b\u7c7b\u522b\u548c\u8fb9\u754c\u6846\u65f6\uff0c\u5c06\u5168\u8fde\u63a5\u5c42\u7684\u8f93\u51fa\u5206\u522b\u8f6c\u6362\u4e3a\u5f62\u72b6\u4e3a n \u00d7 q\uff08q \u662f\u7c7b\u522b\u7684\u6570\u91cf\uff09\u7684\u8f93\u51fa\u548c\u5f62\u72b6\u4e3a n \u00d7 4 \u7684\u8f93\u51fa\u3002\u5176\u4e2d\u9884\u6d4b\u7c7b\u522b\u65f6\u4f7f\u2f64softmax \u56de\u5f52\u3002<\/li><\/ol>\n\n\n\n<p>\u5728Fast R-CNN \u4e2d\u63d0\u51fa\u7684\u5174\u8da3\u533a\u57df\u6c47\u805a\u5c42\u4e0e 6.5\u8282 \u4e2d\u4ecb\u7ecd\u7684\u6c47\u805a\u5c42\u6709\u6240\u4e0d\u540c\u3002\u5728\u6c47\u805a\u5c42\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u8bbe\u7f6e\u6c60\u5316\u7a97\u53e3\u3001\u586b\u5145\u548c\u6b65\u5e45\u7684\u2f24\u5c0f\u6765\u95f4\u63a5\u63a7\u5236\u8f93\u51fa\u5f62\u72b6\u3002\u800c\u5174\u8da3\u533a\u57df\u6c47\u805a\u5c42\u5bf9\u6bcf\u4e2a\u533a\u57df\u7684\u8f93\u51fa\u5f62\u72b6\u662f\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\u7684\u3002\u4f8b\u5982\uff0c\u6307\u5b9a\u6bcf\u4e2a\u533a\u57df\u8f93\u51fa\u7684\u2fbc\u548c\u5bbd\u5206\u522b\u4e3a h2 \u548c w2\u3002\u5bf9\u4e8e\u4efb\u4f55\u5f62\u72b6\u4e3a h \u00d7 w \u7684\u5174\u8da3\u533a\u57df\u7a97\u53e3\uff0c\u8be5\u7a97\u53e3\u5c06\u88ab\u5212\u5206\u4e3a h2 \u00d7 w2 \u2f26\u7a97\u53e3\u2f79\u683c\uff0c\u5176\u4e2d\u6bcf\u4e2a\u2f26\u7a97\u53e3\u7684\u2f24\u5c0f\u7ea6\u4e3a(h\/h2) \u00d7 (w\/w2)\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u4efb\u4f55\u2f26\u7a97\u53e3\u7684\u2fbc\u5ea6\u548c\u5bbd\u5ea6\u90fd\u5e94\u5411\u4e0a\u53d6\u6574\uff0c\u5176\u4e2d\u7684\u6700\u2f24\u5143\u7d20\u4f5c\u4e3a\u8be5\u2f26\u7a97\u53e3\u7684\u8f93\u51fa\u3002\u56e0\u6b64\uff0c\u5174\u8da3\u533a\u57df\u6c47\u805a\u5c42\u53ef\u4ece\u5f62\u72b6\u5404\u5f02\u7684\u5174\u8da3\u533a\u57df\u4e2d\u5747\u62bd\u53d6\u51fa\u5f62\u72b6\u76f8\u540c\u7684\u7279\u5f81\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"731\" height=\"306\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-467.png\" alt=\"\" class=\"wp-image-6769\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-467.png 731w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-467-300x126.png 300w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/><\/figure>\n\n\n\n<p>3\u3001Faster R-CNN<\/p>\n\n\n\n<p>\u4e3a\u4e86\u8f83\u7cbe\u786e\u5730\u68c0\u6d4b\u2f6c\u6807\u7ed3\u679c\uff0cFast R-CNN \u6a21\u578b\u901a\u5e38\u9700\u8981\u5728\u9009\u62e9\u6027\u641c\u7d22\u4e2d\u2f63\u6210\u2f24\u91cf\u7684\u63d0\u8bae\u533a\u57df\u3002Faster R-CNN [Ren et al., 2015] \u63d0\u51fa\u5c06\u9009\u62e9\u6027\u641c\u7d22\u66ff\u6362\u4e3a \u533a\u57df\u63d0\u8bae\u2f79\u7edc\uff08region proposal network\uff09\uff0c\u4ece\u800c\u51cf\u5c11\u63d0\u8bae\u533a\u57df\u7684\u2f63\u6210\u6570\u91cf\uff0c\u5e76\u4fdd\u8bc1\u2f6c\u6807\u68c0\u6d4b\u7684\u7cbe\u5ea6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/miro.medium.com\/max\/700\/1*pSnVmJCyQIRKHDPt3cfnXA.png\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"591\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-468-1024x591.png\" alt=\"\" class=\"wp-image-6771\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-468-1024x591.png 1024w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-468-300x173.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-468-768x443.png 768w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-468.png 1177w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u4e0eFast R-CNN \u76f8\u2f50\uff0cFaster R-CNN \u53ea\u5c06\u2f63\u6210\u63d0\u8bae\u533a\u57df\u7684\u2f45\u6cd5\u4ece\u9009\u62e9\u6027<br>\u641c\u7d22\u6539\u4e3a\u4e86\u533a\u57df\u63d0\u8bae\u2f79\u7edc\uff0c\u6a21\u578b\u7684\u5176\u4f59\u90e8\u5206\u4fdd\u6301\u4e0d\u53d8\u3002<strong>\u5177\u4f53\u6765\u8bf4\uff0c\u533a\u57df\u63d0\u8bae\u2f79\u7edc\u7684\u8ba1\u7b97\u6b65\u9aa4\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ol><li><strong>\u4f7f\u2f64\u586b\u5145\u4e3a1\u7684 3 \u00d7 3 \u7684\u5377\u79ef\u5c42\u53d8\u6362\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u7684\u8f93\u51fa\uff0c\u5e76\u5c06\u8f93\u51fa\u901a\u9053\u6570\u8bb0\u4e3a c\u3002\u8fd9\u6837\uff0c\u5377\u79ef\u795e\u7ecf\u2f79\u7edc\u4e3a\u56fe\u50cf\u62bd\u53d6\u7684\u7279\u5f81\u56fe\u4e2d\u7684\u6bcf\u4e2a\u5355\u5143\u5747\u5f97\u5230\u2f00\u4e2a\u2ed3\u5ea6\u4e3a c \u7684\u65b0\u7279\u5f81\u3002<\/strong><\/li><li><strong>\u4ee5\u7279\u5f81\u56fe\u7684\u6bcf\u4e2a\u50cf\u7d20\u4e3a\u4e2d\u2f3c\uff0c\u2f63\u6210\u591a\u4e2a\u4e0d\u540c\u2f24\u5c0f\u548c\u5bbd\u2fbc\u2f50\u7684\u951a\u6846\u5e76\u6807\u6ce8\u5b83\u4eec\u3002<\/strong><\/li><li><strong>\u4f7f\u2f64\u951a\u6846\u4e2d\u2f3c\u5355\u5143\u2ed3\u5ea6\u4e3a c \u7684\u7279\u5f81\uff0c\u5206\u522b\u9884\u6d4b\u8be5\u951a\u6846\u7684\u2f06\u5143\u7c7b\u522b\uff08\u542b\u2f6c\u6807\u8fd8\u662f\u80cc\u666f\uff09\u548c\u8fb9\u754c\u6846\u3002<\/strong><\/li><li><strong>\u4f7f\u2f64\u2fae\u6781\u2f24\u503c\u6291\u5236\uff0c\u4ece\u9884\u6d4b\u7c7b\u522b\u4e3a\u2f6c\u6807\u7684\u9884\u6d4b\u8fb9\u754c\u6846\u4e2d\u79fb\u9664\u76f8\u4f3c\u7684\u7ed3\u679c\u3002\u6700\u7ec8\u8f93\u51fa\u7684\u9884\u6d4b\u8fb9\u754c\u6846\u5373\u662f\u5174\u8da3\u533a\u57df\u6c47\u805a\u5c42\u6240\u9700\u7684\u63d0\u8bae\u533a\u57df\u3002<\/strong><\/li><\/ol>\n\n\n\n<p>\u503c\u5f97\u2f00\u63d0\u7684\u662f\uff0c\u533a\u57df\u63d0\u8bae\u2f79\u7edc\u4f5c\u4e3a Faster R-CNN \u6a21\u578b\u7684\u2f00\u90e8\u5206\uff0c\u662f\u548c\u6574\u4e2a\u6a21\u578b\u2f00\u8d77\u8bad\u7ec3\u5f97\u5230\u7684\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c<strong>Faster R-CNN \u7684\u2f6c\u6807\u51fd\u6570\u4e0d\u4ec5\u5305\u62ec\u2f6c\u6807\u68c0\u6d4b\u4e2d\u7684\u7c7b\u522b\u548c\u8fb9\u754c\u6846\u9884\u6d4b\uff0c\u8fd8\u5305\u62ec\u533a\u57df\u63d0\u8bae\u2f79\u7edc\u4e2d\u951a\u6846\u7684\u2f06\u5143\u7c7b\u522b\u548c\u8fb9\u754c\u6846\u9884\u6d4b<\/strong>\u3002\u4f5c\u4e3a\u7aef\u5230\u7aef\u8bad\u7ec3\u7684\u7ed3\u679c\uff0c\u533a\u57df\u63d0\u8bae\u2f79\u7edc\u80fd\u591f\u5b66\u4e60\u5230\u5982\u4f55\u2f63\u6210\u2fbc\u8d28\u91cf\u7684\u63d0\u8bae\u533a\u57df\uff0c\u4ece\u800c\u5728\u51cf\u5c11\u4e86\u4ece\u6570\u636e\u4e2d\u5b66\u4e60\u7684\u63d0\u8bae\u533a\u57df\u7684\u6570\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u4ecd\u4fdd\u6301\u2f6c\u6807\u68c0\u6d4b\u7684\u7cbe\u5ea6<\/p>\n\n\n\n<p>4\u3001Mask R-CNN<\/p>\n\n\n\n<p>\u5982\u679c\u5728\u8bad\u7ec3\u96c6\u4e2d\u8fd8\u6807\u6ce8\u4e86\u6bcf\u4e2a\u2f6c\u6807\u5728\u56fe\u50cf\u4e0a\u7684\u50cf\u7d20\u7ea7\u4f4d\u7f6e\uff0c\u90a3\u4e48 Mask R-CNN [He et al., 2017] \u80fd\u591f\u6709\u6548\u5730\u5229\u2f64\u8fd9\u4e9b\u8be6\u5c3d\u7684\u6807\u6ce8\u4fe1\u606f\u8fdb\u2f00\u6b65\u63d0\u5347\u2f6c\u6807\u68c0\u6d4b\u7684\u7cbe\u5ea6\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-469.png\" alt=\"\" class=\"wp-image-6774\" width=\"552\" height=\"446\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-469.png 821w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-469-300x243.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/08\/image-469-768x622.png 768w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/figure><\/div>\n\n\n\n<p>\u5982 \u56fe13.8.5 \u6240\u2f70\uff0cMask R-CNN \u662f\u57fa\u4e8e Faster R-CNN \u4fee\u6539\u800c\u6765\u7684\u3002\u5177\u4f53\u6765\u8bf4\uff0cMask R-CNN \u5c06<strong>\u5174\u8da3\u533a\u57df\u6c47\u805a\u5c42\u66ff\u6362\u4e3a\u4e86 \u5174\u8da3\u533a\u57df (RoI) \u5bf9\u2eec\u5c42<\/strong>\uff0c<strong>\u4f7f\u2f64 \u53cc\u7ebf\u6027\u63d2\u503c\uff08bilinear interpolation\uff09\u6765\u4fdd\u7559\u7279\u5f81\u56fe\u4e0a\u7684\u7a7a\u95f4\u4fe1\u606f\uff0c\u4ece\u800c\u66f4\u9002\u4e8e\u50cf\u7d20\u7ea7\u9884\u6d4b<\/strong>\u3002\u5174\u8da3\u533a\u57df\u5bf9\u2eec\u5c42\u7684\u8f93\u51fa\u5305\u542b\u4e86\u6240\u6709\u4e0e\u5174\u8da3\u533a\u57df\u7684\u5f62\u72b6\u76f8\u540c\u7684\u7279\u5f81\u56fe\u3002\u5b83\u4eec\u4e0d\u4ec5\u88ab\u2f64\u4e8e\u9884\u6d4b\u6bcf\u4e2a\u5174\u8da3\u533a\u57df\u7684\u7c7b\u522b\u548c\u8fb9\u754c\u6846\uff0c\u8fd8\u901a\u8fc7\u989d\u5916\u7684\u5168\u5377\u79ef\u2f79\u7edc\u9884\u6d4b\u2f6c\u6807\u7684\u50cf\u7d20\u7ea7\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<h2>\u8865\u5145\uff1aROI Align \u548c ROI Pooling<\/h2>\n\n\n\n<p>\u8fd9\u4e24\u4e2a\u90fd\u662f\u7528\u5728rpn\u4e4b\u540e\u7684\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4ecefeature map\u4e0a\u7ecf\u8fc7RPN\u5f97\u5230\u4e00\u7cfb\u5217\u7684proposals\uff0c\u5927\u69822k\u4e2a\uff0c\u8fd9\u4e9bbbox\u5927\u5c0f\u4e0d\u7b49\uff0c\u5982\u4f55\u5c06\u8fd9\u4e9bbbox\u7684\u7279\u5f81\u8fdb\u884c\u7edf\u4e00\u8868\u793a\u5c31\u53d8\u6210\u4e86\u4e00\u4e2a\u95ee\u9898\u3002\u5373\u9700\u8981\u627e\u4e00\u4e2a\u529e\u6cd5\u4ece\u5927\u5c0f\u4e0d\u7b49\u7684\u6846\u4e2d\u63d0\u53d6\u7279\u5f81\u4f7f\u8f93\u51fa\u7ed3\u679c\u662f\u7b49\u957f\u7684\u3002\u6700\u5f00\u59cb\u76ee\u6807\u68c0\u6d4b\u6a21\u578bFaster RCNN\u4e2d\u7528\u4e86\u4e00\u4e2a\u7b80\u5355\u7c97\u66b4\u7684\u529e\u6cd5\uff0c\u53ebROI Pooling\u3002\u8be5\u65b9\u5f0f\u5728\u8bed\u4e49\u5206\u5272\u8fd9\u79cd\u7cbe\u7ec6\u7a0b\u5ea6\u9ad8\u7684\u4efb\u52a1\u4e2d\uff0c\u4e0d\u591f\u7cbe\u51c6\uff0c\u7531\u6b64\u53d1\u5c55\u6765\u4e86ROI Align\u3002<\/p>\n\n\n\n<p>ROI Pooling\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-228.png\" alt=\"\" class=\"wp-image-8050\" width=\"248\" height=\"246\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-228.png 553w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-228-300x297.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-228-150x150.png 150w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-228-120x120.png 120w\" sizes=\"(max-width: 248px) 100vw, 248px\" \/><\/figure><\/div>\n\n\n\n<p>\u5047\u5982\u73b0\u5728\u6709\u4e00\u4e2a8&#215;8\u7684feature map\uff0c\u73b0\u5728\u5e0c\u671b\u5f97\u52302&#215;2\u7684\u8f93\u51fa\uff0c\u6709\u4e00\u4e2abbox\u5750\u6807\u4e3a[0,3,7,8]\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2abbox\u7684w=7\uff0ch=5\uff0c\u5982\u679c\u8981\u7b49\u5206\u6210\u56db\u5757\u662f\u505a\u4e0d\u5230\u7684\uff0c\u56e0\u6b64\u5728ROI Pooling\u4e2d\u4f1a\u8fdb\u884c\u53d6\u6574\u3002\u5c31\u6709\u4e86\u4e0a\u56fe\u770b\u5230\u7684h\u88ab\u5206\u5272\u4e3a2,3\uff0cw\u88ab\u5206\u5272\u62103,4\u3002\u8fd9\u6837\u4e4b\u540e\u5728\u6bcf\u4e00\u5757(\u79f0\u4e3abin)\u4e2d\u505amax pooling\uff0c\u53ef\u4ee5\u5f97\u5230\u4e0b\u56fe\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" width=\"181\" height=\"163\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-229.png\" alt=\"\" class=\"wp-image-8051\"\/><\/figure><\/div>\n\n\n\n<p>\u8fd9\u6837\u5c31\u53ef\u4ee5\u5c06\u4efb\u610f\u5927\u5c0fbbox\u8f6c\u62102&#215;2\u8868\u793a\u7684feature\u3002<\/p>\n\n\n\n<p>ROI Pooling\u9700\u8981\u53d6\u6574\uff0c\u8fd9\u6837\u7684\u53d6\u6574\u64cd\u4f5c\u8fdb\u884c\u4e86\u4e24\u6b21\uff0c\u4e00\u6b21\u662f\u5f97\u5230bbox\u5728feature map\u4e0a\u7684\u5750\u6807\u65f6\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a\u539f\u56fe\u4e0a\u7684bbox\u5927\u5c0f\u4e3a665&#215;665\uff0c\u7ecfbackbone\u540e\uff0cspatial scale=1\/32\u3002\u56e0\u6b64bbox\u4e5f\u76f8\u5e94\u5e94\u8be5\u7f29\u5c0f\u4e3a665\/32=20.78\uff0c\u4f46\u662f\u8fd9\u5e76\u4e0d\u662f\u4e00\u4e2a\u771f\u5b9e\u7684pixel\u6240\u5728\u7684\u4f4d\u7f6e\uff0c\u56e0\u6b64\u8fd9\u4e00\u6b65\u4f1a\u53d6\u4e3a20\u30020.78\u7684\u5dee\u8ddd\u53cd\u9988\u5230\u539f\u56fe\u5c31\u662f0.78&#215;32=25\u4e2a\u50cf\u7d20\u7684\u5dee\u8ddd\u3002\u5982\u679c\u662f\u5927\u76ee\u6807\u8fd925\u7684\u5dee\u8ddd\u53ef\u80fd\u770b\u4e0d\u51fa\u6765\uff0c\u4f46\u5bf9\u4e8e\u5c0f\u76ee\u6807\u800c\u8a00\u5dee\u8ddd\u5c31\u6bd4\u8f83\u5de8\u5927\u4e86\u3002<\/p>\n\n\n\n<h2>ROI Align<\/h2>\n\n\n\n<p>\u56e0\u6b64\u6709\u4eba\u63d0\u51fa\u4e0d\u9700\u8981\u8fdb\u884c\u53d6\u6574\u64cd\u4f5c\uff0c\u5982\u679c\u8ba1\u7b97\u5f97\u5230\u5c0f\u6570\uff0c\u4e5f\u5c31\u662f\u6ca1\u6709\u843d\u5230\u771f\u5b9e\u7684pixel\u4e0a\uff0c\u90a3\u4e48\u5c31\u7528\u6700\u8fd1\u7684pixel\u5bf9\u8fd9\u4e00\u70b9\u865a\u62dfpixel\u8fdb\u884c\u53cc\u7ebf\u6027\u63d2\u503c\uff0c\u5f97\u5230\u8fd9\u4e2a\u201cpixel\u201d\u7684\u503c\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-230.png\" alt=\"\" class=\"wp-image-8053\" width=\"201\" height=\"268\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-230.png 350w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-230-225x300.png 225w\" sizes=\"(max-width: 201px) 100vw, 201px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-232.png\" alt=\"\" class=\"wp-image-8055\" width=\"218\" height=\"185\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-232.png 1005w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-232-300x254.png 300w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/09\/image-232-768x650.png 768w\" sizes=\"(max-width: 218px) 100vw, 218px\" 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