{"id":225,"date":"2013-09-20T00:29:46","date_gmt":"2013-09-19T15:29:46","guid":{"rendered":"https:\/\/www.dogrow.net\/octave\/?p=225"},"modified":"2019-10-26T19:56:14","modified_gmt":"2019-10-26T10:56:14","slug":"blog26","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/octave\/blog26\/","title":{"rendered":"(26) imread, imwrite\u3067\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u66f8\u304d"},"content":{"rendered":"

imread<\/span>\u3067\u4efb\u610f\u306e\u5f62\u5f0f\u306e\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u914d\u5217\u30c7\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3081\u308b\u3002
\n\u203bimread\u306b\u5931\u6557\u3059\u308b\u5834\u5408\u306f\u300c(25) imread\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b<\/a>\u300d\u3092\u53c2\u7167\u306e\u3053\u3068<\/span><\/p>\n

\r\noctave:1> ls\r\ngfish.png\r\noctave:2> img=imread<\/span>('gfish.png');\r\noctave:3> size(img)\r\nans =\r\n   238   307     3\r\noctave:4><\/pre>\n
imfinfo<\/span> \u3067\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u60c5\u5831\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002
\n\u3053\u306e\u753b\u50cf\u306f\u3001\u7e26238\u30d4\u30af\u30bb\u30eb\u3001\u6a2a307\u30d4\u30af\u30bb\u30eb\u3001RGB 3\u30d0\u30f3\u30c9\u306ePNG\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3060\u3002<\/p>\n
\r\noctave:5> imfinfo<\/span>('gfish.png')\r\nans =\r\n  scalar structure containing the fields:\r\n    Filename = \/home\/temp\/work\/gfish.png\r\n    FileModDate = 19-Sep-2013 00:03:27\r\n    FileSize =  125173\r\n    Height =  238\r\n    Width =  307\r\n    BitDepth =  8\r\n    Format = PNG\r\n    LongFormat = Portable Network Graphics\r\n    XResolution =  37.790\r\n    YResolution =  37.790\r\n    TotalColors =  40382\r\n    TileName = \r\n    AnimationDelay = 0\r\n    AnimationIterations = 0\r\n    ByteOrder = undefined\r\n    Gamma =  0.45455\r\n    Matte = 0\r\n    ModulusDepth =  8\r\n    Quality =  75\r\n    QuantizeColors =  256\r\n    ResolutionUnits = undefined\r\n    ColorType = truecolor\r\n    View = \r\noctave:6><\/pre>\n
imshow<\/span>\u3067\u5909\u6570\u306b\u8aad\u307f\u8fbc\u3093\u3060\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n
\r\noctave:6> imshow<\/span>(img)\r\noctave:7><\/pre>\n
\"https:\/\/www.dogrow.net\/octave\/wp-content\/uploads\/2013\/09\/20130920_01.png\"<\/p>\n
\u5909\u6570\u306b\u8aad\u307f\u8fbc\u3093\u3060\u753b\u50cf\u30c7\u30fc\u30bf\u306f\u3001\u914d\u5217\u30c7\u30fc\u30bf\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002
\n\u4f8b\u3048\u3070\u3001\u5404\u30d4\u30af\u30bb\u30eb\u306eRGB\u30d0\u30f3\u30c9\u306e\u5e73\u5747\u5024(\u753b\u50cf\u30c7\u30fc\u30bf\u914d\u5217\u306e3\u6b21\u5143\u76ee\u306e\u5e73\u5747\u5024)\u3092\u7b97\u51fa\u3057\u3001\u30b0\u30ec\u30fc\u30b9\u30b1\u30fc\u30eb\u753b\u50cf\u3092\u4f5c\u6210\u3057\u3066\u307f\u308b\u3002<\/p>\n
\r\noctave:7> gimg = uint8(mean(img,3));\r\noctave:8> imshow(gimg)\r\noctave:9><\/pre>\n
\u30b0\u30ec\u30fc\u30b9\u30b1\u30fc\u30eb\u753b\u50cf\u304c\u3067\u304d\u305f\u3002
\n\"https:\/\/www.dogrow.net\/octave\/wp-content\/uploads\/2013\/09\/20130920_02.png\"<\/p>\n
\u4f5c\u6210\u3057\u305f\u30b0\u30ec\u30fc\u30b9\u30b1\u30fc\u30eb\u753b\u50cf\u3092 imwrite<\/span>\u3067PNG\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u3057\u3066\u307f\u308b\u3002<\/p>\n
\r\noctave:9> imwrite<\/span>(gimg,'gray.png','png')\r\noctave:10> ls\r\ngfish.png  gray.png\r\noctave:11><\/pre>\n
\n","protected":false},"excerpt":{"rendered":"
imread\u3067\u4efb\u610f\u306e\u5f62\u5f0f\u306e\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u914d\u5217\u30c7\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3081\u308b\u3002 \u203bimread\u306b\u5931\u6557\u3059\u308b\u5834\u5408\u306f\u300c(25) imread\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u300d\u3092\u53c2\u7167\u306e\u3053\u3068 octave:1> ls gfish.png octav\u2026 \u7d9a\u304d\u3092\u8aad\u3080 »<\/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":[16,20],"tags":[],"class_list":["post-225","post","type-post","status-publish","format-standard","hentry","category-16","category-20"],"views":15555,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/comments?post=225"}],"version-history":[{"count":17,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/225\/revisions"}],"predecessor-version":[{"id":978,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/225\/revisions\/978"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/media?parent=225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/categories?post=225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/tags?post=225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}