{"id":534,"date":"2026-02-27T19:52:14","date_gmt":"2026-02-27T11:52:14","guid":{"rendered":"https:\/\/wo.city\/?p=534"},"modified":"2026-02-27T19:52:14","modified_gmt":"2026-02-27T11:52:14","slug":"non-local-means-image-denoising-self-similarity","status":"publish","type":"post","link":"https:\/\/wo.city\/?p=534","title":{"rendered":"\u975e\u5c40\u90e8\u5747\u503c\uff1a\u7528\u56fe\u50cf\u81ea\u8eab\u7684\u5197\u4f59\u53bb\u566a"},"content":{"rendered":"<h2>\u53bb\u566a\u7684\u6838\u5fc3\u77db\u76fe\uff1a\u5e73\u6ed1\u4e0e\u7ec6\u8282\u7684\u62c9\u952f<\/h2>\n<p>\u56fe\u50cf\u53bb\u566a\u7684\u6570\u5b66\u6a21\u578b\u5f88\u7b80\u5355\uff1a\u89c2\u6d4b\u503c v(i) = u(i) + n(i)\uff0c\u5176\u4e2d u \u662f\u771f\u5b9e\u56fe\u50cf\uff0cn \u662f\u52a0\u6027\u9ad8\u65af\u767d\u566a\u58f0\u3002\u51e0\u4e4e\u6240\u6709\u53bb\u566a\u65b9\u6cd5\u7684\u672c\u8d28\u90fd\u662f\u67d0\u79cd\u5f62\u5f0f\u7684&#8221;\u5e73\u5747&#8221;\u2014\u2014\u9ad8\u65af\u5e73\u6ed1\u5728\u7a7a\u95f4\u57df\u505a\u5377\u79ef\uff0c\u5404\u5411\u5f02\u6027\u6ee4\u6ce2\u6cbf\u7279\u5b9a\u65b9\u5411\u5e73\u5747\uff0c\u5168\u53d8\u5206\u6700\u5c0f\u5316\u901a\u8fc7\u53d8\u5206\u6cd5\u6c42\u89e3\uff0c\u5c0f\u6ce2\u9608\u503c\u5728\u9891\u57df\u64cd\u4f5c\u3002\u4f46\u5e73\u5747\u5929\u7136\u4e0e\u4fdd\u7559\u7ec6\u8282\u77db\u76fe\uff1a\u5e73\u6ed1\u5f97\u8d8a\u591a\uff0c\u566a\u58f0\u53bb\u5f97\u8d8a\u5e72\u51c0\uff0c\u7eb9\u7406\u548c\u8fb9\u7f18\u4e5f\u4e22\u5f97\u8d8a\u591a\u3002<\/p>\n<p>Buades\u3001Coll \u548c Morel \u5728 2005 \u5e74 CVPR \u4e0a\u63d0\u51fa\u7684\u8fd9\u7bc7\u8bba\u6587\u505a\u4e86\u4e24\u4ef6\u4e8b\uff1a\u4e00\u662f\u5f15\u5165&#8221;\u65b9\u6cd5\u566a\u58f0&#8221;\uff08method noise\uff09\u8fd9\u4e2a\u8bc4\u4ef7\u5de5\u5177\uff0c\u7528\u7edf\u4e00\u7684\u6846\u67b6\u63ed\u793a\u5404\u7c7b\u53bb\u566a\u7b97\u6cd5\u5230\u5e95\u7834\u574f\u4e86\u56fe\u50cf\u7684\u4ec0\u4e48\u7ed3\u6784\uff1b\u4e8c\u662f\u63d0\u51fa\u975e\u5c40\u90e8\u5747\u503c\u7b97\u6cd5\uff08Non-Local Means, NL-means\uff09\uff0c\u901a\u8fc7\u5229\u7528\u56fe\u50cf\u81ea\u8eab\u5728\u8fdc\u8ddd\u79bb\u4e0a\u7684\u5197\u4f59\u6a21\u5f0f\u6765\u7a81\u7834\u5c40\u90e8\u6ee4\u6ce2\u7684\u6839\u672c\u9650\u5236\u3002<\/p>\n<h2>\u65b9\u6cd5\u566a\u58f0\uff1a\u4e00\u9762\u7167\u51fa\u7b97\u6cd5\u7f3a\u9677\u7684\u955c\u5b50<\/h2>\n<p>\u65b9\u6cd5\u566a\u58f0\u7684\u5b9a\u4e49\u6781\u5176\u76f4\u89c2\uff1a\u7ed9\u5b9a\u4e00\u5e45\u56fe\u50cf u \u548c\u4e00\u4e2a\u53bb\u566a\u7b97\u5b50 D_h\uff0c\u65b9\u6cd5\u566a\u58f0\u5c31\u662f u \u2212 D_h(u)\u3002\u5982\u679c\u7b97\u6cd5\u8db3\u591f\u597d\uff0c\u8fd9\u4e2a\u5dee\u503c\u5e94\u8be5\u770b\u8d77\u6765\u50cf\u7eaf\u566a\u58f0\uff0c\u4e0d\u5305\u542b\u4efb\u4f55\u53ef\u8fa8\u8bc6\u7684\u51e0\u4f55\u7ed3\u6784\u3002\u53cd\u8fc7\u6765\uff0c\u5982\u679c\u65b9\u6cd5\u566a\u58f0\u4e2d\u51fa\u73b0\u4e86\u8fb9\u7f18\u3001\u7eb9\u7406\u6216\u5176\u4ed6\u6709\u610f\u4e49\u7684\u56fe\u6848\uff0c\u8bf4\u660e\u7b97\u6cd5\u628a\u4e0d\u8be5\u53bb\u6389\u7684\u4e1c\u897f\u53bb\u6389\u4e86\u3002<\/p>\n<p>\u8bba\u6587\u5bf9\u56db\u7c7b\u7ecf\u5178\u5c40\u90e8\u5e73\u6ed1\u6ee4\u6ce2\u5668\u9010\u4e00\u63a8\u5bfc\u4e86\u65b9\u6cd5\u566a\u58f0\u7684\u89e3\u6790\u8868\u8fbe\u5f0f\uff0c\u7ed3\u8bba\u6e05\u6670\u800c\u5c16\u9510\uff1a<\/p>\n<ul>\n<li>\u9ad8\u65af\u6ee4\u6ce2\uff1a\u65b9\u6cd5\u566a\u58f0\u6b63\u6bd4\u4e8e h\u00b2\u0394u\uff08\u62c9\u666e\u62c9\u65af\u7b97\u5b50\uff09\uff0c\u5728\u56fe\u50cf\u5e73\u5766\u533a\u57df\u51e0\u4e4e\u4e3a\u96f6\uff0c\u4f46\u5728\u8fb9\u7f18\u548c\u7eb9\u7406\u5904\u2014\u2014\u62c9\u666e\u62c9\u65af\u503c\u5927\u7684\u5730\u65b9\u2014\u2014\u65b9\u6cd5\u566a\u58f0\u5267\u70c8\u589e\u5927\u3002\u6362\u8a00\u4e4b\uff0c\u9ad8\u65af\u6ee4\u6ce2\u5fc5\u7136\u6a21\u7cca\u8fb9\u7f18\u3002<\/li>\n<li>\u5404\u5411\u5f02\u6027\u6ee4\u6ce2\uff08Perona-Malik \u7c7b\uff09\uff1a\u65b9\u6cd5\u566a\u58f0\u6b63\u6bd4\u4e8e h\u00b2|Du|\u00b7curv(u)\uff0c\u5373\u68af\u5ea6\u5e45\u503c\u4e58\u4ee5\u7b49\u7070\u5ea6\u7ebf\u66f2\u7387\u3002\u76f4\u7ebf\u8fb9\u7f18\uff08\u66f2\u7387\u4e3a\u96f6\uff09\u88ab\u5b8c\u7f8e\u4fdd\u7559\uff0c\u4f46\u5f2f\u66f2\u8fb9\u7f18\u548c\u7eb9\u7406\u533a\u57df\u4ecd\u7136\u53d7\u635f\u3002<\/li>\n<li>\u5168\u53d8\u5206\u6700\u5c0f\u5316\uff08Rudin-Osher-Fatemi\uff09\uff1a\u65b9\u6cd5\u566a\u58f0\u4e3a \u2212(1\/2\u03bb)\u00b7curv(TV_\u03bb(u))\uff0c\u4e0e\u5404\u5411\u5f02\u6027\u6ee4\u6ce2\u7c7b\u4f3c\u5730\u4f9d\u8d56\u66f2\u7387\uff0c\u76f4\u8fb9\u7f18\u5b89\u5168\uff0c\u7ec6\u8282\u548c\u7eb9\u7406\u5728 \u03bb \u8f83\u5c0f\u65f6\u88ab\u8fc7\u5ea6\u5e73\u6ed1\u3002<\/li>\n<li>\u90bb\u57df\u6ee4\u6ce2\uff08Yaroslavsky \u6ee4\u6ce2\u5668\uff0c\u4ee5\u53ca\u540e\u6765\u7684 SUSAN \u548c\u53cc\u8fb9\u6ee4\u6ce2\uff09\uff1a\u901a\u8fc7\u6bd4\u8f83\u5355\u4e2a\u50cf\u7d20\u7070\u5ea6\u503c\u6765\u51b3\u5b9a\u6743\u91cd\uff0c\u907f\u514d\u4e86\u8de8\u8fb9\u7f18\u5e73\u5747\uff0c\u4f46\u5355\u50cf\u7d20\u6bd4\u8f83\u5728\u566a\u58f0\u4e0b\u4e0d\u591f\u9c81\u68d2\uff0c\u4e14\u4f1a\u4ea7\u751f\u4eba\u5de5\u9636\u8dc3\u4f2a\u5f71\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u89e3\u6790\u7ed3\u679c\u5728\u5b9e\u9a8c\u4e2d\u5f97\u5230\u4e86\u89c6\u89c9\u9a8c\u8bc1\u3002\u8bba\u6587\u5bf9\u6807\u51c6 Lena \u56fe\u50cf\u8ba1\u7b97\u4e86\u5404\u7b97\u6cd5\u7684\u65b9\u6cd5\u566a\u58f0\u56fe\uff1a\u9ad8\u65af\u6ee4\u6ce2\u7684\u65b9\u6cd5\u566a\u58f0\u4e2d\u6e05\u6670\u53ef\u89c1\u8fb9\u7f18\u8f6e\u5ed3\uff0c\u5404\u5411\u5f02\u6027\u6ee4\u6ce2\u6b8b\u7559\u5f2f\u66f2\u7ed3\u6784\uff0c\u5168\u53d8\u5206\u6b8b\u7559\u7eb9\u7406\uff0c\u90bb\u57df\u6ee4\u6ce2\u51fa\u73b0\u5757\u72b6\u4f2a\u5f71\u3002\u800c NL-means \u7684\u65b9\u6cd5\u566a\u58f0\u56fe\u4e2d\u51e0\u4e4e\u770b\u4e0d\u5230\u4efb\u4f55\u53ef\u8fa8\u8bc6\u7684\u51e0\u4f55\u7ed3\u6784\u2014\u2014\u8fd9\u6b63\u662f\u4e00\u4e2a\u597d\u7684\u53bb\u566a\u7b97\u6cd5\u5e94\u6709\u7684\u8868\u73b0\u3002<\/p>\n<h2>NL-means\uff1a\u4ece\u5c40\u90e8\u90bb\u57df\u5230\u5168\u5c40\u81ea\u76f8\u4f3c<\/h2>\n<p>NL-means \u7684\u6838\u5fc3\u601d\u60f3\u53ef\u4ee5\u7528\u4e00\u53e5\u8bdd\u6982\u62ec\uff1a\u53bb\u566a\u67d0\u4e2a\u50cf\u7d20\u65f6\uff0c\u4e0d\u53ea\u770b\u5b83\u5468\u56f4\u7684\u51e0\u4e2a\u90bb\u5c45\uff0c\u800c\u662f\u5728\u6574\u5e45\u56fe\u50cf\u4e2d\u5bfb\u627e\u6240\u6709&#8221;\u90bb\u57df\u6a21\u5f0f\u76f8\u4f3c&#8221;\u7684\u50cf\u7d20\uff0c\u7528\u5b83\u4eec\u7684\u52a0\u6743\u5e73\u5747\u4f5c\u4e3a\u4f30\u8ba1\u503c\u3002<\/p>\n<p>\u5177\u4f53\u5730\uff0c\u5bf9\u4e8e\u50cf\u7d20 i\uff0c\u5176\u53bb\u566a\u503c\u4e3a\u6240\u6709\u50cf\u7d20 j \u7684\u52a0\u6743\u5e73\u5747 NL[v](i) = \u03a3_j w(i,j)\u00b7v(j)\uff0c\u6743\u91cd\u7531\u4e24\u4e2a\u50cf\u7d20\u5404\u81ea\u90bb\u57df\u5757\uff08patch\uff09\u7684\u76f8\u4f3c\u5ea6\u51b3\u5b9a\uff1a<\/p>\n<p>w(i,j) = (1\/Z(i)) \u00b7 exp(\u2212\u2016v(N_i) \u2212 v(N_j)\u2016\u00b2_{2,a} \/ h\u00b2)<\/p>\n<p>\u5176\u4e2d N_i \u548c N_j \u662f\u4ee5 i \u548c j \u4e3a\u4e2d\u5fc3\u7684\u65b9\u5f62\u90bb\u57df\uff0c\u2016\u00b7\u2016_{2,a} \u662f\u9ad8\u65af\u52a0\u6743\u7684\u6b27\u6c0f\u8ddd\u79bb\uff0ch \u662f\u6ee4\u6ce2\u53c2\u6570\uff0cZ(i) \u662f\u5f52\u4e00\u5316\u5e38\u6570\u3002<\/p>\n<p>\u4e0e\u90bb\u57df\u6ee4\u6ce2\uff08\u53cc\u8fb9\u6ee4\u6ce2\uff09\u7684\u5173\u952e\u533a\u522b\u5728\u4e8e\uff1a\u90bb\u57df\u6ee4\u6ce2\u53ea\u6bd4\u8f83\u5355\u4e2a\u50cf\u7d20\u7684\u7070\u5ea6\u503c\uff0cNL-means \u6bd4\u8f83\u7684\u662f\u6574\u4e2a\u90bb\u57df\u5757\u7684\u51e0\u4f55\u914d\u7f6e\u3002\u8bba\u6587\u7528\u4e00\u4e2a\u76f4\u89c2\u7684\u4f8b\u5b50\u8bf4\u660e\u4e86\u8fd9\u4e00\u70b9\uff1a\u50cf\u7d20 q\u2083 \u53ef\u80fd\u548c\u53c2\u8003\u50cf\u7d20 p \u6709\u5b8c\u5168\u76f8\u540c\u7684\u7070\u5ea6\u503c\uff0c\u4f46\u5982\u679c\u5b83\u4eec\u7684\u90bb\u57df\u6a21\u5f0f\u622a\u7136\u4e0d\u540c\uff0c\u6743\u91cd w(p, q\u2083) \u4f1a\u63a5\u8fd1\u96f6\u3002\u8fd9\u79cd\u57fa\u4e8e patch \u7684\u6bd4\u8f83\u6bd4\u5355\u50cf\u7d20\u6bd4\u8f83\u9c81\u68d2\u5f97\u591a\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u5173\u952e\u6027\u8d28\u662f&#8221;\u975e\u5c40\u90e8&#8221;\uff1a\u641c\u7d22\u8303\u56f4\u4e0d\u9650\u4e8e\u53c2\u8003\u50cf\u7d20\u7684\u5c0f\u90bb\u57df\uff0c\u800c\u662f\uff08\u539f\u5219\u4e0a\uff09\u904d\u5386\u6574\u5e45\u56fe\u50cf\u3002\u56fe\u50cf\u4e2d\u8fdc\u8ddd\u79bb\u4f4d\u7f6e\u53ef\u80fd\u5b58\u5728\u9ad8\u5ea6\u76f8\u4f3c\u7684\u6a21\u5f0f\u2014\u2014\u540c\u4e00\u7eb9\u7406\u7684\u91cd\u590d\u3001\u5bf9\u79f0\u7ed3\u6784\u3001\u76f8\u4f3c\u7684\u8fb9\u7f18\u8d70\u5411\u2014\u2014NL-means \u80fd\u591f\u5229\u7528\u8fd9\u4e9b\u8fdc\u8ddd\u79bb\u5197\u4f59\u3002\u8bba\u6587\u5c55\u793a\u4e86\u4e0d\u540c\u56fe\u50cf\u7ed3\u6784\u4e0b\u7684\u6743\u91cd\u5206\u5e03\u56fe\uff1a\u5e73\u5766\u533a\u57df\u7684\u6743\u91cd\u5206\u6563\u5728\u540c\u4e00\u7269\u4f53\u5185\u90e8\u7684\u5927\u91cf\u50cf\u7d20\u4e0a\uff1b\u76f4\u8fb9\u7f18\u7684\u6743\u91cd\u6cbf\u7740\u6574\u6761\u8fb9\u7f18\u7ebf\u5206\u5e03\uff1b\u5468\u671f\u6027\u7eb9\u7406\u7684\u6743\u91cd\u5728\u6240\u6709\u91cd\u590d\u5355\u5143\u4e0a\u5747\u5300\u5206\u5e03\u3002<\/p>\n<p>\u5728\u566a\u58f0\u9c81\u68d2\u6027\ufffd\ufffd\ufffd\u9762\uff0c\u8bba\u6587\u7ed9\u51fa\u4e86\u4e00\u4e2a\u7b80\u6d01\u7684\u7b49\u5f0f\uff1aE\u2016v(N_i) \u2212 v(N_j)\u2016\u00b2_{2,a} = \u2016u(N_i) \u2212 u(N_j)\u2016\u00b2_{2,a} + 2\u03c3\u00b2\u3002\u8fd9\u8bf4\u660e\u5728\u671f\u671b\u610f\u4e49\u4e0b\uff0c\u542b\u566a patch \u4e4b\u95f4\u7684\u8ddd\u79bb\u4fdd\u6301\u4e86\u771f\u5b9e patch \u4e4b\u95f4\u7684\u76f8\u4f3c\u6027\u6392\u5e8f\u2014\u2014\u566a\u58f0\u53ea\u662f\u5747\u5300\u5730\u62ac\u9ad8\u4e86\u6240\u6709\u8ddd\u79bb\uff0c\u4e0d\u6539\u53d8\u76f8\u5bf9\u5927\u5c0f\u3002<\/p>\n<h2>\u7406\u8bba\u4fdd\u8bc1\uff1a\u8d8b\u5411\u6761\u4ef6\u671f\u671b<\/h2>\n<p>\u8bba\u6587\u4e3a NL-means \u63d0\u4f9b\u4e86\u4e00\u4e2a\u6e10\u8fd1\u4e00\u81f4\u6027\u7ed3\u679c\u3002\u5047\u8bbe\u56fe\u50cf\u662f\u4e00\u4e2a\u4e25\u683c\u5e73\u7a33\u6df7\u5408\u968f\u673a\u573a\u7684\u5b9e\u73b0\uff0c\u5f53\u56fe\u50cf\u5c3a\u5bf8\u589e\u957f\u65f6\uff08\u5373\u53ef\u7528\u7684\u76f8\u4f3c patch \u8d8a\u6765\u8d8a\u591a\uff09\uff0cNL-means \u7684\u8f93\u51fa\u51e0\u4e4e\u5fc5\u7136\u6536\u655b\u5230\u6761\u4ef6\u671f\u671b E[V(i) | V(N_i\\{i})]\u3002<\/p>\n<p>\u5728\u52a0\u6027\u767d\u566a\u58f0\u6a21\u578b\u4e0b\uff0c\u8fd9\u4e2a\u6761\u4ef6\u671f\u671b\u6070\u597d\u662f\u4f7f\u5747\u65b9\u8bef\u5dee\u6700\u5c0f\u7684\u4f30\u8ba1\u2014\u2014\u5373\u5728\u6240\u6709\u4ec5\u4f9d\u8d56\u4e8e\u90bb\u57df\u89c2\u6d4b\u503c\u7684\u51fd\u6570\u4e2d\uff0c\u6761\u4ef6\u671f\u671b\u662f\u6700\u4f18\u7684\u3002\u8fd9\u610f\u5473\u7740 NL-means \u5e76\u975e\u8bd5\u56fe\u5c06\u56fe\u50cf\u5206\u89e3\u4e3a&#8221;\u5149\u6ed1\u90e8\u5206 + \u632f\u8361\u90e8\u5206&#8221;\uff08\u8fd9\u662f\u5168\u53d8\u5206\u548c\u5c0f\u6ce2\u65b9\u6cd5\u7684\u601d\u8def\uff09\uff0c\u800c\u662f\u76f4\u63a5\u4f30\u8ba1\u7ed9\u5b9a\u90bb\u57df\u6a21\u5f0f\u4e0b\u50cf\u7d20\u503c\u7684\u6700\u4f73\u9884\u6d4b\u3002\u8fd9\u662f\u4e00\u4e2a\u672c\u8d28\u6027\u7684\u89c6\u89d2\u8f6c\u6362\uff1a\u53bb\u566a\u4e0d\u662f\u5206\u79bb\uff0c\u800c\u662f\u9884\u6d4b\u3002<\/p>\n<p>\u4e0e\u9891\u57df\u65b9\u6cd5\u5f62\u6210\u5bf9\u6bd4\u7684\u662f\uff0c<a href=\"https:\/\/wo.city\/?p=532\">\u300a\u7528\u5c0f\u6ce2\u6536\u7f29\u9002\u5e94\u672a\u77e5\u5149\u6ed1\u6027\u300b<\/a>\u4e2d\u8ba8\u8bba\u7684 SureShrink \u65b9\u6cd5\u901a\u8fc7\u5c0f\u6ce2\u7cfb\u6570\u7684\u81ea\u9002\u5e94\u9608\u503c\u5316\u5b9e\u73b0\u53bb\u566a\uff0c\u5176\u7406\u8bba\u4f18\u52bf\u5728\u4e8e\u5bf9\u672a\u77e5\u5149\u6ed1\u6027\u7684\u81ea\u9002\u5e94\u6027\u3002NL-means \u8d70\u4e86\u4e00\u6761\u5b8c\u5168\u4e0d\u540c\u7684\u8def\uff1a\u5b83\u4e0d\u4f9d\u8d56\u4efb\u4f55\u5173\u4e8e\u4fe1\u53f7\u5149\u6ed1\u6027\u7684\u5047\u8bbe\uff0c\u800c\u662f\u5229\u7528\u56fe\u50cf\u7684\u81ea\u76f8\u4f3c\u7ed3\u6784\u2014\u2014\u8fd9\u79cd\u7ed3\u6784\u5728\u81ea\u7136\u56fe\u50cf\u4e2d\u666e\u904d\u5b58\u5728\uff0c\u4f46\u5728\u4f20\u7edf\u51fd\u6570\u7a7a\u95f4\u6846\u67b6\u4e2d\u96be\u4ee5\u523b\u753b\u3002<\/p>\n<h2>\u5b9e\u9a8c\u7ed3\u679c\u4e0e\u5b9e\u8df5\u542f\u793a<\/h2>\n<p>\u5b9e\u9a8c\u8bbe\u7f6e\u4e0a\uff0cNL-means \u4f7f\u7528 7\u00d77 \u7684\u76f8\u4f3c\u6027\u90bb\u57df\u7a97\u53e3\u548c 21\u00d721 \u7684\u641c\u7d22\u7a97\u53e3\uff0c\u6ee4\u6ce2\u53c2\u6570 h \u8bbe\u4e3a 10\u03c3\uff08\u03c3 \u4e3a\u566a\u58f0\u6807\u51c6\u5dee\uff09\u3002\u7b97\u6cd5\u590d\u6742\u5ea6\u7ea6\u4e3a 49 \u00d7 441 \u00d7 N\u00b2\uff08N\u00b2 \u4e3a\u50cf\u7d20\u603b\u6570\uff09\uff0c\u76f8\u6bd4\u5c40\u90e8\u6ee4\u6ce2\u5668\u663e\u7136\u66f4\u9ad8\uff0c\u4f46\u4f5c\u8005\u6307\u51fa 7\u00d77 \u7a97\u53e3\u5728\u9c81\u68d2\u6027\u548c\u7ec6\u8282\u4fdd\u7559\u4e4b\u95f4\u53d6\u5f97\u4e86\u826f\u597d\u5e73\u8861\uff0c\u800c\u6307\u6570\u6838\u7684\u5feb\u901f\u8870\u51cf\u4f7f\u5f97\u5927\u8ddd\u79bb\u7684\u6743\u91cd\u81ea\u52a8\u8d8b\u8fd1\u4e8e\u96f6\uff0c\u76f8\u5f53\u4e8e\u5185\u7f6e\u4e86\u81ea\u9002\u5e94\u9608\u503c\u3002<\/p>\n<p>\u5728\u6807\u51c6\u5dee\u4e3a 20 \u7684\u9ad8\u65af\u566a\u58f0\u4e0b\uff0cLena \u56fe\u50cf\u7684\u5747\u65b9\u8bef\u5dee\u5bf9\u6bd4\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u9ad8\u65af\u6ee4\u6ce2\uff1a120<\/li>\n<li>\u5404\u5411\u5f02\u6027\u6ee4\u6ce2\uff1a114<\/li>\n<li>\u5168\u53d8\u5206\u6700\u5c0f\u5316\uff1a110<\/li>\n<li>\u90bb\u57df\u6ee4\u6ce2\uff08Yaroslavsky\uff09\uff1a129<\/li>\n<li>NL-means\uff1a68<\/li>\n<\/ul>\n<p>NL-means \u7684\u5747\u65b9\u8bef\u5dee\u4e0d\u5230\u5168\u53d8\u5206\u7684 62%\uff0c\u4f18\u52bf\u76f8\u5f53\u663e\u8457\u3002\u5728 Baboon \u56fe\u50cf\uff08\u7eb9\u7406\u6781\u5176\u4e30\u5bcc\uff09\u4e0a\uff0c\u5dee\u8ddd\u540c\u6837\u660e\u663e\uff1aNL-means \u4e3a 292\uff0c\u5168\u53d8\u5206\u4e3a 365\uff0c\u9ad8\u65af\u6ee4\u6ce2\u9ad8\u8fbe 507\u3002\u7eb9\u7406\u8d8a\u4e30\u5bcc\uff0c\u56fe\u50cf\u7684\u81ea\u76f8\u4f3c\u5197\u4f59\u8d8a\u591a\uff0cNL-means \u7684\u4f18\u52bf\u8d8a\u5927\u2014\u2014\u8fd9\u4e0e\u7b97\u6cd5\u7684\u8bbe\u8ba1\u76f4\u89c9\u5b8c\u5168\u4e00\u81f4\u3002<\/p>\n<p>\u89c6\u89c9\u8d28\u91cf\u4e0a\uff0c\u8bba\u6587\u5c55\u793a\u4e86\u6807\u51c6\u5dee 35 \u7684\u81ea\u7136\u7eb9\u7406\u53bb\u566a\u5bf9\u6bd4\u548c\u6807\u51c6\u5dee 20 \u7684\u81ea\u7136\u56fe\u50cf\u53bb\u566a\u5bf9\u6bd4\u3002\u5c40\u90e8\u6ee4\u6ce2\u5668\u8981\u4e48\u6a21\u7cca\u7eb9\u7406\uff08\u9ad8\u65af\uff09\uff0c\u8981\u4e48\u4fdd\u7559\u8fb9\u7f18\u4f46\u635f\u5931\u7ec6\u8282\uff08\u5404\u5411\u5f02\u6027\u3001\u5168\u53d8\u5206\uff09\uff0c\u8981\u4e48\u4ea7\u751f\u4f2a\u5f71\uff08\u90bb\u57df\u6ee4\u6ce2\uff09\u3002NL-means \u5728\u8fb9\u7f18\u3001\u7eb9\u7406\u548c\u5e73\u5766\u533a\u57df\u4e0a\u90fd\u8868\u73b0\u51fa\u66f4\u5747\u8861\u7684\u6062\u590d\u80fd\u529b\u3002<\/p>\n<p>\u4ece\u5b9e\u8df5\u89d2\u5ea6\u770b\uff0cNL-means \u7684\u8d21\u732e\u4e0d\u4ec5\u662f\u4e00\u4e2a\u5177\u4f53\u7b97\u6cd5\uff0c\u66f4\u662f\u4e00\u79cd\u601d\u7ef4\u65b9\u5f0f\u7684\u8f6c\u53d8\uff1a\u56fe\u50cf\u53bb\u566a\u7684\u4fe1\u606f\u6e90\u4e0d\u5fc5\u5c40\u9650\u4e8e\u50cf\u7d20\u7684\u7a7a\u95f4\u90bb\u57df\uff0c\u56fe\u50cf\u81ea\u8eab\u5728\u5168\u5c40\u5c3a\u5ea6\u4e0a\u7684\u5197\u4f59\u548c\u81ea\u76f8\u4f3c\u6027\u662f\u4e00\u79cd\u5c1a\u672a\u88ab\u5145\u5206\u5229\u7528\u7684\u8d44\u6e90\u3002\u8fd9\u4e2a\u601d\u8def\u540e\u6765\u6df1\u523b\u5f71\u54cd\u4e86\u56fe\u50cf\u5904\u7406\u9886\u57df\u2014\u2014\u4ece BM3D\uff08\u5c06 NL-means \u7684 patch \u5339\u914d\u4e0e\u9891\u57df\u6ee4\u6ce2\u7ed3\u5408\uff09\u5230\u6df1\u5ea6\u5b66\u4e60\u65f6\u4ee3\u7684\u975e\u5c40\u90e8\u6ce8\u610f\u529b\u673a\u5236\uff08non-local neural networks\uff09\uff0c\u6838\u5fc3\u7406\u5ff5\u90fd\u53ef\u4ee5\u8ffd\u6eaf\u5230\u8fd9\u7bc7\u8bba\u6587\u3002\u65b9\u6cd5\u566a\u58f0\u4f5c\u4e3a\u8bc4\u4ef7\u5de5\u5177\u540c\u6837\u6709\u6301\u4e45\u4ef7\u503c\uff1a\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u4e0d\u4f9d\u8d56&#8221;\u52a0\u566a\u518d\u53bb\u566a&#8221;\u7684\u7b97\u6cd5\u8bca\u65ad\u65b9\u5f0f\uff0c\u76f4\u63a5\u63ed\u793a\u7b97\u6cd5\u5bf9\u771f\u5b9e\u56fe\u50cf\u7ed3\u6784\u7684\u7834\u574f\u7a0b\u5ea6\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u8ba1\u7b97\u6210\u672c\u662f NL-means \u6700\u660e\u663e\u7684\u5c40\u9650\u3002\u5373\u4f7f\u9650\u5236\u4e86\u641c\u7d22\u7a97\u53e3\uff0c\u6bcf\u50cf\u7d20\u7684\u8ba1\u7b97\u91cf\u4ecd\u8fdc\u9ad8\u4e8e\u5c40\u90e8\u6ee4\u6ce2\u5668\u3002\u8bba\u6587\u4e5f\u672a\u8ba8\u8bba\u566a\u58f0\u6c34\u5e73\u4f30\u8ba1\u4e0d\u51c6\u786e\u65f6\u7684\u9c81\u68d2\u6027\uff0c\u4ee5\u53ca\u5728\u975e\u9ad8\u65af\u566a\u58f0\u6a21\u578b\u4e0b\u7684\u8868\u73b0\u3002\u4f46\u4f5c\u4e3a\u4e00\u4e2a\u6982\u5ff5\u6027\u7a81\u7834\uff0c\u5b83\u6253\u5f00\u7684\u65b9\u5411\u8fdc\u6bd4\u5b83\u81ea\u8eab\u7684\u5c40\u9650\u66f4\u91cd\u8981\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u67902005\u5e74CVPR\u7ecf\u5178\u8bba\u6587Non-Local 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