{"id":31,"date":"2013-10-05T02:24:37","date_gmt":"2013-10-04T17:24:37","guid":{"rendered":"https:\/\/www.dogrow.net\/nnet\/?p=31"},"modified":"2025-06-11T22:48:30","modified_gmt":"2025-06-11T13:48:30","slug":"blog2","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/nnet\/blog2\/","title":{"rendered":"(2) MNIST\u5b66\u7fd2\u753b\u50cf\u3092\u898b\u3066\u307f\u308b"},"content":{"rendered":"<p>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305fMNIST\u753b\u50cf\u306f\u3001\u4e00\u822c\u7684\u306a\u753b\u50cf\u30d3\u30e5\u30fc\u30a2\u3067\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002<br \/>\n\u3053\u3053\u3067\u306f\u30d5\u30ea\u30fc\u306e\u6570\u5024\u8a08\u7b97\u30bd\u30d5\u30c8 <span class=\"my_fc_deeppinkB\">GNU-Octave<\/span> \u3092\u4f7f\u3063\u3066 MNIST\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u53ef\u8996\u5316\u3057\u3066\u307f\u308b\u3002<\/p>\n<p>\u3010\u53c2\u8003\u3011<br \/>\n<a href=\"https:\/\/www.dogrow.net\/nnet\/blog28\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u300c(28) MNIST\u753b\u50cf\u3092PNG\u753b\u50cf\u3067\u51fa\u529b\u3059\u308b\uff08Python\u7248\uff09\u300d\u3067\u306f\u3001\u540c\u3058\u3053\u3068\u3092 Python\u3067\u3082\u3084\u3063\u3066\u307f\u307e\u3057\u305f\u3002<\/a><\/p>\n<p>\u5b66\u7fd2\u7528\u753b\u50cf\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3092\u30aa\u30fc\u30d7\u30f3\u3059\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:2> fid = <span class=\"my_fc_deeppinkB\">fopen<\/span>('train-images-idx3-ubyte','r','b')\r\nfid =  3\r\n<\/pre>\n<p>\u5b66\u7fd2\u7528\u753b\u50cf\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_03.png\" alt=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_03.png\" class=\"my_add_bs1\" \/><br \/>\n\u30d5\u30a1\u30a4\u30eb\u5148\u982d\u306e\u30d8\u30c3\u30c0\u90e8\u5206\u306b\u306f\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c4\u9805\u76ee\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:3> magic_number = <span class=\"my_fc_deeppinkB\">fread<\/span>(fid,1,'int32')\r\nmagic_number =  2051\r\noctave:4> number_of_items = <span class=\"my_fc_deeppinkB\">fread<\/span>(fid, 1, 'int32')\r\nnumber_of_items =  60000\r\noctave:5> number_of_rows = <span class=\"my_fc_deeppinkB\">fread<\/span>(fid,1,'int32')\r\nnumber_of_rows =  28\r\noctave:6> number_of_columns = <span class=\"my_fc_deeppinkB\">fread<\/span>(fid,1,'int32')\r\nnumber_of_columns =  28\r\n<\/pre>\n<p><span class=\"my_fc_deeppinkB\">\u7e26\u6a2a28 x 28\u30d4\u30af\u30bb\u30eb\u306e\u753b\u50cf\u304c 60,000\u679a<\/span>\u5165\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3002<\/p>\n<p>\u6b21\u306b\u753b\u50cf\u3092\u8aad\u307f\u51fa\u3057\u3066\u307f\u308b\u3002<br \/>\nGNU-Octave\u3067\u306f\u3001fread\u95a2\u6570\u3067\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u30922\u6b21\u5143\u914d\u5217\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:7> img = <span class=\"my_fc_deeppinkB\">fread<\/span>(fid, [28*28 60000],'uint8');\r\noctave:8> size(img)\r\nans =\r\n     784   60000\r\noctave:9> img = <span class=\"my_fc_deeppinkB\">reshape<\/span>(img,28,28,60000);\r\noctave:10> size(img)\r\nans =\r\n      28      28   60000\r\n<\/pre>\n<p>\u5148\u982d\u304b\u3089\u4e00\u3064\u305a\u3064\u753b\u50cf\u3092\u8868\u793a\u3057\u3066\u307f\u308b\u3002<br \/>\nGNU-Octave\u3067\u306f\u3001imshow\u30b3\u30de\u30f3\u30c9\u30672\u6b21\u5143\u914d\u5217\u30c7\u30fc\u30bf\u3092\u7c21\u5358\u306b\u753b\u50cf\u3068\u3057\u3066\u8868\u793a\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:11> v = uint8(img(:,:,1)');\r\noctave:12> imshow(v)\r\n<\/pre>\n<p>\u3053\u308c\u306f\u300c\uff15\u300d\u3060\u308d\u3046\u304b\uff1f<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M01.png\" alt=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M01.png\" \/><\/p>\n<p>\uff12\u756a\u76ee\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u5b66\u7fd2\u753b\u50cf\u3082\u898b\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:13> v = uint8(img(:,:,2)');\r\noctave:14> imshow(v)\r\n<\/pre>\n<p>\u3053\u308c\u306f\u300c\uff10\u300d\u306b\u9593\u9055\u3044\u306a\u3044\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M02.png\" alt=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M02.png\" \/><\/p>\n<p>\uff16\uff10\uff10\uff10\uff10\u500b\u76ee\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u5b66\u7fd2\u753b\u50cf\u3082\u898b\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:15> v = uint8(img(:,:,60000)');\r\noctave:16> imshow(v)\r\n<\/pre>\n<p>\u3053\u308c\u306f\u300c\uff18\u300d\u306b\u9593\u9055\u3044\u306a\u3044\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M03.png\" alt=\"https:\/\/www.dogrow.net\/nnet\/wp-content\/uploads\/2013\/10\/20131005_M03.png\" \/><\/p>\n<p><a href=\"https:\/\/www.dogrow.net\/nnet\/blog3\/\">\u6b21\u56de\u300c(3) MNIST\u753b\u50cf\u3092PNG\u753b\u50cf\u3067\u51fa\u529b\u3059\u308b\u300d\u3067\u306f\u3001MNIST\u753b\u50cf\u3092 PNG\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u5316\u3057\u3066\u773a\u3081\u3066\u307f\u308b\u3002<\/a><\/p>\n<hr class=\"my_hr_bottom\">\n","protected":false},"excerpt":{"rendered":"<p>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305fMNIST\u753b\u50cf\u306f\u3001\u4e00\u822c\u7684\u306a\u753b\u50cf\u30d3\u30e5\u30fc\u30a2\u3067\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002 \u3053\u3053\u3067\u306f\u30d5\u30ea\u30fc\u306e\u6570\u5024\u8a08\u7b97\u30bd\u30d5\u30c8 GNU-Octave \u3092\u4f7f\u3063\u3066 MNIST\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u53ef\u8996\u5316\u3057\u3066\u307f\u308b\u3002 \u3010\u53c2\u8003\u3011 \u300c(28) MNIST\u753b\u50cf\u3092\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.dogrow.net\/nnet\/blog2\/\">\u7d9a\u304d\u3092\u8aad\u3080 &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[3],"class_list":["post-31","post","type-post","status-publish","format-standard","hentry","category-2","tag-3"],"views":10752,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/posts\/31","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/comments?post=31"}],"version-history":[{"count":19,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/posts\/31\/revisions"}],"predecessor-version":[{"id":2534,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/posts\/31\/revisions\/2534"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/media?parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/categories?post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/nnet\/wp-json\/wp\/v2\/tags?post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}