{"id":64,"date":"2019-11-20T18:06:49","date_gmt":"2019-11-20T10:06:49","guid":{"rendered":"http:\/\/123.57.142.208\/?p=64"},"modified":"2019-11-20T18:06:49","modified_gmt":"2019-11-20T10:06:49","slug":"dl-002-spp","status":"publish","type":"post","link":"http:\/\/43.142.23.155\/?p=64","title":{"rendered":"DL-002-SPP"},"content":{"rendered":"<p>\u7a7a\u95f4\u91d1\u5b57\u5854\u53d8\u6362\u5c42<\/p>\n<p>\uff08Spatial Pyramid Pooling\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>\u76f4\u63a5\u8bf4\u9488\u5bf9RCNN\u7684\u6539\u8fdb\u70b9<\/p>\n<p>SPP\uff1a<\/p>\n<p>1.CNN\u7f51\u7edc\u540e\u9762\u63a5\u7684\u5168\u8fde\u63a5\u5c42\uff08FC\uff09\u5c42\u9700\u8981\u56fa\u5b9a\u7684\u8f93\u5165\u5927\u5c0f\uff0c\u9650\u5236\u7f51\u7edc\u7684\u8f93\u5165\u5927\u5c0f\u3002<\/p>\n<p>2.\u5019\u9009\u533a\u57df\u4e00\u5f20\u56fe\u7247\u67092000\u5f20\uff0c\u5168\u90e8\u585e\u7ed9CNN\u63d0\u53d6\u7279\u5f81\u5411\u91cf\uff0c\u5927\u91cf\u7684\u91cd\u590d\u8ba1\u7b97\uff0c\u9020\u6210\u6548\u7387\u4f4e\u4e0b\u3002<\/p>\n<p>\u5173\u4e8e\u8f93\u5165\u9650\u5236\u7684\u5904\u7406\uff1a<\/p>\n<p>Crop\u548cwarp\u662fRCNN\u5bf9\u4e8e\u5019\u9009\u533a\u57df\u7684\u5904\u7406\u65b9\u5f0f\u3002<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-66\" src=\"http:\/\/123.57.142.208\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1.png\" alt=\"\" width=\"1455\" height=\"862\" srcset=\"http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1.png 1455w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1-300x178.png 300w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1-1024x607.png 1024w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1-768x455.png 768w\" sizes=\"auto, (max-width: 1455px) 100vw, 1455px\" \/><\/p>\n<p>\u5173\u4e8e\u8ba1\u7b97\u91cf\u8fc7\u5927\u7684\u5904\u7406\uff1a<\/p>\n<p>SPPNet\u63d0\u51fa\u4e86\u4e00\u79cd\u4ece\u5019\u9009\u533a\u57df\u5230\u5168\u56fe\u7684\u7279\u5f81\u6620\u5c04(feature map)\u4e4b\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\uff0c\u901a\u8fc7\u6b64\u79cd\u6620\u5c04\u5173\u7cfb\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5230\u5019\u9009\u533a\u57df\u7684\u7279\u5f81\u5411\u91cf\uff0c\u4e0d\u9700\u8981\u91cd\u590d\u4f7f\u7528CNN\u63d0\u53d6\u7279\u5f81\uff0c\u4ece\u800c\u5927\u5e45\u5ea6\u7f29\u77ed\u8bad\u7ec3\u65f6\u95f4\u3002<\/p>\n<p>\u518d\u5177\u4f53\uff1aSPP\u662f\u76f4\u63a5\u5c06\u6574\u5f20\u56fe\u7ed9CNN\u8f93\u5165\uff0c\u5f97\u5230\u7684feature map \u518d\u62ff\u53bb\u6620\u5c04\u7ed9\u5404\u4e2a\u5019\u9009\u533a\u57df\uff0c\u6620\u5c04\u8fc7\u7a0b\u4e0d\u9700\u8981CNN\uff0c\u56e0\u6b64\u51cf\u5c11\u8ba1\u7b97\u91cf\u3002<\/p>\n<p>\u6620\u5c04\u51fa\u7684\u672a\u77e5\u5927\u5c0f\u7684\u7279\u5f81\u5411\u91cf\u7531SPP\u7ee7\u7eed\u5904\u7406\u3002<\/p>\n<p>\u5173\u4e8eSPP\u5c42<\/p>\n<p>\u5c06\u4e00\u5f20\u56fe\u7247\u4ee5\u4e09\u79cd\u65b9\u5f0f\u5207\u5272\u5e76\u63d0\u53d6\u7279\u5f81\uff08\u5982\u4e0b\u56fe\uff09\uff0c\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4e00\u51711+4+16=21\u79cd\u7279\u5f81\uff0c\u8fd9\u5c31\u662f\u4ee5\u4e0d\u540c\u7684\u5927\u5c0f\u7684bin\u5757\u6765\u63d0\u53d6\u7279\u5f81\u7684\u8fc7\u7a0b\u5c31\u662f\u7a7a\u95f4\u91d1\u5b57\u5854\u53d8\u6362\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-67\" src=\"http:\/\/123.57.142.208\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-2.png\" alt=\"\" width=\"1134\" height=\"1047\" srcset=\"http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-2.png 1134w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-2-300x277.png 300w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-2-1024x945.png 1024w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-2-768x709.png 768w\" sizes=\"auto, (max-width: 1134px) 100vw, 1134px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u5728SPP\u4e2d\u5019\u9009\u533a\u57df\u7684\u6620\u5c04\u5904\u7406\uff1a<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-65\" src=\"http:\/\/123.57.142.208\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247.png\" alt=\"\" width=\"1088\" height=\"861\" srcset=\"http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247.png 1088w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-300x237.png 300w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-1024x810.png 1024w, http:\/\/43.142.23.155\/wp-content\/uploads\/2019\/11\/\u672a\u547d\u540d\u56fe\u7247-768x608.png 768w\" sizes=\"auto, (max-width: 1088px) 100vw, 1088px\" \/><\/p>\n<p>\u5206\u6210\u7684\u4e09\u5f201*1\uff0c2*2\uff0c4*4\u5b50\u56fe\uff0c\u5bf9\u6bcf\u5f20\u5b50\u56fe\u7684\u6bcf\u4e2a\u533a\u57df\u505amax pooling \uff0c\u518d\u5c06\u6240\u5f97\u5230\u7684\u7279\u5f81\u5411\u91cf\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u6240\u4ee5\u7ecf\u8fc7SPP\u8f93\u51fa\uff081+4+16\uff09*256 \u5927\u5c0f\u7684\u7279\u5f81\u5411\u91cf\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e00\u4e9b\u603b\u7ed3\uff1a<\/p>\n<p>1) \u591a\u7a97\u53e3\u7684pooling\u4f1a\u63d0\u9ad8\u5b9e\u9a8c\u7684\u51c6\u786e\u7387<\/p>\n<p>2) \u8f93\u5165\u540c\u4e00\u56fe\u50cf\u7684\u4e0d\u540c\u5c3a\u5bf8\uff0c\u4f1a\u63d0\u9ad8\u5b9e\u9a8c\u51c6\u786e\u7387(\u4ece\u5c3a\u5ea6\u7a7a\u95f4\u6765\u770b\uff0c\u63d0\u9ad8\u4e86\u5c3a\u5ea6\u4e0d\u53d8\u6027(scale invariance))<\/p>\n<p>3) \u7528\u4e86\u591aView(multi-view)\u6765\u6d4b\u8bd5\uff0c\u4e5f\u63d0\u9ad8\u4e86\u6d4b\u8bd5\u7ed3\u679c<\/p>\n<p>4)\u56fe\u50cf\u8f93\u5165\u7684\u5c3a\u5bf8\u5bf9\u5b9e\u9a8c\u7684\u7ed3\u679c\u662f\u6709\u5f71\u54cd\u7684(\u56e0\u4e3a\u76ee\u6807\u7279\u5f81\u533a\u57df\u6709\u5927\u6709\u6709\u5c0f)<\/p>\n<p>5)\u56e0\u4e3a\u6211\u4eec\u66ff\u4ee3\u7684\u662f\u7f51\u7edc\u7684Pooling\u5c42\uff0c\u5bf9\u6574\u4e2a\u7f51\u7edc\u7ed3\u6784\u6ca1\u6709\u5f71\u54cd\uff0c\u6240\u4ee5\u53ef\u4ee5\u4f7f\u5f97\u6574\u4e2a\u7f51\u7edc\u53ef\u4ee5\u6b63\u5e38\u8bad\u7ec3\u3002<\/p>\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u53ef\u4ee5\u53c2\u8003\uff1a<\/p>\n<p>\u3010\u76ee\u6807\u68c0\u6d4b\u3011SPP-Net (Spatial Pyramid Pooling in Deep Convolutional Networks for Visual Recognition) &#8211; SmileLing\u7684\u4e13\u680f &#8211; CSDN\u535a\u5ba2 <a href=\"https:\/\/blog.csdn.net\/forever__1234\/article\/details\/79910175\">https:\/\/blog.csdn.net\/forever__1234\/article\/details\/79910175<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7a7a\u95f4\u91d1\u5b57\u5854\u53d8\u6362\u5c42 \uff08Spatial Pyramid Pooling\uff09 &nbsp; \u76f4\u63a5\u8bf4\u9488\u5bf9RCNN\u7684\u6539\u8fdb\u70b9 SPP\uff1a 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