{"id":147,"date":"2016-09-07T20:17:20","date_gmt":"2016-09-07T12:17:20","guid":{"rendered":"http:\/\/ayonel.me\/?p=147"},"modified":"2016-09-07T20:34:30","modified_gmt":"2016-09-07T12:34:30","slug":"python-similarity-pic","status":"publish","type":"post","link":"https:\/\/ayonel.malash.net\/index.php\/2016\/09\/07\/python-similarity-pic\/","title":{"rendered":"python\u8fdb\u884c\u7b80\u5355\u7684\u56fe\u7247\u76f8\u4f3c\u5ea6\u68c0\u6d4b"},"content":{"rendered":"

\u6765\u6e90\u4e8e\u962e\u4e00\u5cf0\u7684\u535a\u5ba2<\/a>
\n\u5bf9\u4e24\u5f20\u56fe\u7247\u8fdb\u884c\u76f8\u4f3c\u5ea6\u68c0\u6d4b\uff0c\u601d\u8def\u5c31\u662f\u5bf9\u4e24\u5f20\u56fe\u7247\u5206\u522b\u8ba1\u7b97\u5176\u6307\u7eb9\u4fe1\u606f\uff0c\u7136\u540e\u5bf9\u6bd4\u4e24\u5f20\u56fe\u7247\u7684\u6307\u7eb9\u4fe1\u606f\u7684\u5dee\u5f02\u5ea6\u3002
\n\u57fa\u672c\u7b97\u6cd5\u4e3a\uff1a
\n\u7b2c\u4e00\u6b65\uff0c\u7f29\u5c0f\u5c3a\u5bf8\u3002<\/strong>
\n\u5c06\u56fe\u7247\u7f29\u5c0f\u52308×8\u7684\u5c3a\u5bf8\uff0c\u603b\u517164\u4e2a\u50cf\u7d20\u3002\u8fd9\u4e00\u6b65\u7684\u4f5c\u7528\u662f\u53bb\u9664\u56fe\u7247\u7684\u7ec6\u8282\uff0c\u53ea\u4fdd\u7559\u7ed3\u6784\u3001\u660e\u6697\u7b49\u57fa\u672c\u4fe1\u606f\uff0c\u6452\u5f03\u4e0d\u540c\u5c3a\u5bf8\u3001\u6bd4\u4f8b\u5e26\u6765\u7684\u56fe\u7247\u5dee\u5f02\u3002
\n\"\"<\/p>\n

\u7b2c\u4e8c\u6b65\uff0c\u7b80\u5316\u8272\u5f69\u3002<\/strong>
\n\u5c06\u7f29\u5c0f\u540e\u7684\u56fe\u7247\uff0c\u8f6c\u4e3a64\u7ea7\u7070\u5ea6\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6240\u6709\u50cf\u7d20\u70b9\u603b\u5171\u53ea\u670964\u79cd\u989c\u8272\u3002<\/p>\n

\u7b2c\u4e09\u6b65\uff0c\u8ba1\u7b97\u5e73\u5747\u503c\u3002<\/strong>
\n\u8ba1\u7b97\u6240\u670964\u4e2a\u50cf\u7d20\u7684\u7070\u5ea6\u5e73\u5747\u503c\u3002<\/p>\n

\u7b2c\u56db\u6b65\uff0c\u6bd4\u8f83\u50cf\u7d20\u7684\u7070\u5ea6\u3002<\/strong>
\n\u5c06\u6bcf\u4e2a\u50cf\u7d20\u7684\u7070\u5ea6\uff0c\u4e0e\u5e73\u5747\u503c\u8fdb\u884c\u6bd4\u8f83\u3002\u5927\u4e8e\u6216\u7b49\u4e8e\u5e73\u5747\u503c\uff0c\u8bb0\u4e3a1\uff1b\u5c0f\u4e8e\u5e73\u5747\u503c\uff0c\u8bb0\u4e3a0\u3002<\/p>\n

\u7b2c\u4e94\u6b65\uff0c\u8ba1\u7b97\u54c8\u5e0c\u503c<\/strong>\u3002
\n\u5c06\u4e0a\u4e00\u6b65\u7684\u6bd4\u8f83\u7ed3\u679c\uff0c\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u5c31\u6784\u6210\u4e86\u4e00\u4e2a64\u4f4d\u7684\u6574\u6570\uff0c\u8fd9\u5c31\u662f\u8fd9\u5f20\u56fe\u7247\u7684\u6307\u7eb9\u3002\u7ec4\u5408\u7684\u6b21\u5e8f\u5e76\u4e0d\u91cd\u8981\uff0c\u53ea\u8981\u4fdd\u8bc1\u6240\u6709\u56fe\u7247\u90fd\u91c7\u7528\u540c\u6837\u6b21\u5e8f\u5c31\u884c\u4e86\u3002
\n\"\"=8f373714acfcf4d0
\n\u5f97\u5230\u6307\u7eb9\u4ee5\u540e\uff0c\u5c31\u53ef\u4ee5\u5bf9\u6bd4\u4e0d\u540c\u7684\u56fe\u7247\uff0c\u770b\u770b64\u4f4d\u4e2d\u6709\u591a\u5c11\u4f4d\u662f\u4e0d\u4e00\u6837\u7684\u3002\u5728\u7406\u8bba\u4e0a\uff0c\u8fd9\u7b49\u540c\u4e8e\u8ba1\u7b97”\u6c49\u660e\u8ddd\u79bb”\uff08Hamming distance\uff09\u3002\u5982\u679c\u4e0d\u76f8\u540c\u7684\u6570\u636e\u4f4d\u4e0d\u8d85\u8fc75\uff0c\u5c31\u8bf4\u660e\u4e24\u5f20\u56fe\u7247\u5f88\u76f8\u4f3c\uff1b\u5982\u679c\u5927\u4e8e10\uff0c\u5c31\u8bf4\u660e\u8fd9\u662f\u4e24\u5f20\u4e0d\u540c\u7684\u56fe\u7247\u3002<\/p>\n

\u4ee3\u7801\u7531Wote<\/a>\u5229\u7528Python\u5b9e\u73b0\uff0c\u672c\u6587\u662f\u5bf9Wote\u7684\u6e90\u7801\u505a\u4e00\u70b9\u4fee\u6539\u5e76\u9644\u4e0a\u8be6\u7ec6\u6ce8\u91ca\u3002<\/p>\n

\u672c\u7a0b\u5e8f\u9700\u8981\u5b89\u88c5pillow,<\/p>\n

pip install pillow<\/div><\/div>\n
#coding: utf-8<\/span>
\n'''
\n\u672c\u7a0b\u5e8f\u8fd0\u884c\u65f6\u9700\u8981\u4e24\u5f20\u56fe\u7247\u8def\u5f84,\u9700\u8981\u8f93\u5165\u4e24\u5f20\u56fe\u7247\u8def\u5f84,
\n'''<\/span>
\nfrom<\/span> PIL import<\/span> Image
\n
\n#\u8ba1\u7b97\u6307\u7eb9<\/span>
\ndef<\/span> avhash(<\/span>img)<\/span>:
\n    if<\/span> not<\/span> isinstance<\/span>(<\/span>img,<\/span> Image.Image<\/span>)<\/span>:
\n        img =<\/span> Image.open<\/span>(<\/span>img)<\/span>
\n    img =<\/span> img.resize<\/span>(<\/span>(<\/span>8<\/span>,<\/span> 8<\/span>)<\/span>,<\/span> Image.ANTIALIAS<\/span>)<\/span>.convert<\/span>(<\/span>'L'<\/span>)<\/span> #\u5c06image\u538b\u7f29\u4e3a8*8,\u8f6c\u5316\u4e3a\u7070\u5ea6\u56fe<\/span>
\n    avg =<\/span> reduce<\/span>(<\/span>lambda<\/span> x,<\/span> y: x + y,<\/span> img.getdata<\/span>(<\/span>)<\/span>)<\/span> \/ 64<\/span>. #\u5bf9\u6bcf\u4e2a\u50cf\u7d20\u70b9\u7684\u7070\u5ea6\u7d2f\u548c,\u6700\u540e\u9664\u4ee564,\u5f97\u5230\u7070\u5ea6\u7684\u5e73\u5747\u503c<\/span>
\n
\n    #\u8fd9\u4e00\u53e5\u4ee3\u7801\u5f88pythonic,\u9700\u8981\u4ed4\u7ec6\u6d88\u5316<\/span>
\n    #map\u5bf9\u6bcf\u4e2a\u50cf\u7d20\u505a\u5224\u65ad,\u5927\u4e8e\u5e73\u5747\u503c\u4e3a1,\u5426\u5219\u4e3a0<\/span>
\n    #enumerate\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5217\u8868\u7684\u4e0b\u6807\u53ca\u8be5\u4e0b\u6807\u5bf9\u5e94\u7684\u5143\u7d20,\u7528tuple\u88c5\u8d77\u6765: (index, element)<\/span>
\n    #reduce,\u5bf9\u6bcf\u4e2a\u5143\u7d20\u53f3\u79fb\u5bf9\u5e94\u7684\u4e0b\u6807\u4f4d,\u5e76\u4e14\u4e0e\u524d\u4e00\u4e2a\u5143\u7d20\u505a\u6216\u8fd0\u7b97,\u6700\u7ec8\u5f97\u5230\u7684\u7ed3\u679c\u4e3a\u4e00\u4e2a<\/span>
\n    # 64\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570,\u6bcf\u4e00\u4f4d\u76840,1\u4ee3\u8868\u8be5\u4f4d\u7684\u50cf\u7d20\u7070\u5ea6\u4e0e\u5e73\u5747\u50cf\u7d20\u7070\u5ea6\u7684\u6bd4\u8f83\u7ed3\u679c<\/span>
\n    return<\/span> reduce<\/span>(<\/span>lambda<\/span> x,<\/span> (<\/span>y,<\/span> z)<\/span>: x | (<\/span>z <<<\/span> y)<\/span>,<\/span> enumerate<\/span>(<\/span>map<\/span>(<\/span>lambda<\/span> i: 0<\/span> if<\/span> i <<\/span> avg else<\/span> 1<\/span>,<\/span> img.getdata<\/span>(<\/span>)<\/span>)<\/span>)<\/span>,<\/span> 0<\/span>)<\/span>
\n
\n#\u8ba1\u7b97\u6c49\u660e\u8ddd\u79bb<\/span>
\ndef<\/span> hamming(<\/span>h1,<\/span> h2)<\/span>:
\n    #\u76f4\u63a5\u5bf9\u4e24\u4e2a\u6570\u6309\u4f4d\u505a\u5f02\u6216\u64cd\u4f5c,\u8fd9\u6837\u5f97\u5230\u4e00\u4e2a64\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570,\u8be5\u4e8c\u8fdb\u5236\u6570\u5305\u542b\u76841\u7684\u4e2a\u6570,\u5373\u4e3a\u6c49\u660e\u8ddd\u79bb<\/span>
\n    h,<\/span> d =<\/span> 0<\/span>,<\/span> h1 ^ h2
\n    #\u6c42d\u4e2d\u5305\u542b\u76841\u7684\u4e2a\u6570<\/span>
\n    while<\/span> d:
\n        h +=<\/span> 1<\/span>
\n        d &=<\/span> d - 1<\/span>
\n    return<\/span> h
\n
\nif<\/span> __name__ ==<\/span> '__main__'<\/span>:
\n    img1 =<\/span> raw_input<\/span>(<\/span>'\u8bf7\u8f93\u5165\u7b2c\u4e00\u5f20\u56fe\u7247\u8def\u5f84:'<\/span>)<\/span>
\n    img2 =<\/span> raw_input<\/span>(<\/span>'\u8bf7\u8f93\u5165\u7b2c\u4e8c\u5f20\u56fe\u7247\u8def\u5f84:'<\/span>)<\/span>
\n    h1 =<\/span> avhash(<\/span>img1)<\/span>
\n    h2 =<\/span> avhash(<\/span>img2)<\/span>
\n    print<\/span> "\u4e24\u5f20\u56fe\u7247\u7684\u6307\u7eb9\u6c49\u660e\u8ddd\u79bb\u4e3a:%s"<\/span> % hamming(<\/span>h1,<\/span> h2)<\/span><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

\u6765\u6e90\u4e8e<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-147","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/posts\/147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/comments?post=147"}],"version-history":[{"count":12,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/posts\/147\/revisions"}],"predecessor-version":[{"id":160,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/posts\/147\/revisions\/160"}],"wp:attachment":[{"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/media?parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/categories?post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ayonel.malash.net\/index.php\/wp-json\/wp\/v2\/tags?post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}