{"id":657,"date":"2006-07-25T01:00:00","date_gmt":"2006-07-24T16:00:00","guid":{"rendered":"https:\/\/ecoop.net\/memo\/2006-07-25-1.html"},"modified":"2017-03-16T15:27:33","modified_gmt":"2017-03-16T06:27:33","slug":"2006-07-25-1","status":"publish","type":"post","link":"https:\/\/www.ecoop.net\/memo\/archives\/2006-07-25-1.html","title":{"rendered":"ImageMagick \u306e convert \u3067\u534a\u900f\u660e\u306a PNG \u3092\u6271\u3046"},"content":{"rendered":"

\nPNG \u306fRGB\u3068\u3068\u3082\u306b\u03b1\u5024\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u534a\u900f\u660e\u8272\u3068\u3044\u3046\u306e\u3082\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n

# a.gif \u306e\u767d(#FFFFFF)\u3092\u534a\u900f\u660e(50%=0x80)\u306b\u3057\u3001b.png \u3068\u3057\u3066\u4fdd\u5b58(\u5165\u529b\u306e\u5f62\u5f0f\u306f\u4efb\u610f\u3067\u3059\u304c\u3001\u51fa\u529b\u306f png \u5fc5\u9808\u3067\u3059)\u3002
\nconvert a.gif -fill “#FFFFFF80” -opaque “#FFFFFF00” b.png
\n# \u534a\u900f\u660e\u306b\u306a\u3063\u305f\u304b\u78ba\u8a8d\u306e\u305f\u3081\u80cc\u666f\u753b\u50cf bg.jpg \u306e\u4e0a\u306b b.png \u3092\u91cd\u306d\u3001
\n# c.jpg \u3068\u3057\u3066\u4fdd\u5b58\u3059\u308b(\u80cc\u666f\u3001\u51fa\u529b\u306e\u753b\u50cf\u5f62\u5f0f\u306f\u4efb\u610f\u3067\u3059)\u3002
\nconvert -compose over bg.jpg b.png c.jpg\n<\/p><\/blockquote>\n

\u53c2\u8003:
\n– convert \u30b3\u30de\u30f3\u30c9\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u306f\u300c\u6307\u5b9a\u3057\u305f\u8272\u3092\u5225\u306e\u8272\u306b\u7f6e\u304d\u63db\u3048\u308b
\n<\/a>\u300d\u3092\u53c2\u7167\u3002
\n– PNG\u306b\u3064\u3044\u3066\u306f JEvaHz Messages 1320-1331<\/a> \u3092\u53c2\u8003\u306b\u3057\u307e\u3057\u305f\u3002\n<\/p>\n

PNG\u306e\u900f\u660e\u5316\u306f\u5927\u5225\u3057\u30662\u7a2e\u985e\u306e\u6307\u5b9a\u65b9\u6cd5\u304c\u3042\u308a\u3001\u8272\u6df1\u5ea6\u306a\u3069\u306b\u3088\u308a\u53b3\u5bc6\u306b\u306f
\n4\u7a2e\u985e\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002
\n 
\n1.\u03b1\u30c1\u30e3\u30f3\u30cd\u30eb\u3092\u7528\u3044\u308b\u5834\u5408\uff08Color type = 4 or 6\uff09
\n  \uff088bit,16bit grayscale \/ 24bit,48bit color\uff09
\n\u3000RGB\u5024\u3082\u3057\u304f\u306fgrayscale\u5024\u306b\u52a0\u3048\u3001\u30d4\u30af\u30bb\u30eb\u6bce\u306b\u03b1\u5024\uff08\u900f\u660e\u5ea6\uff09\u3092\u4fdd\u6301\u3002
\n\u3000\u03b1\u5024\u306e\u6df1\u5ea6\u306f\u8272\u6df1\u5ea6\u3068\u540c\u3058\u3002
\n 
\n2.tRNS(=transparency) chunk\u3092\u7528\u3044\u308b\u5834\u5408
\n  a.1,2,4,8bit indexed color\u306e\u5834\u5408\uff08Color type = 3\uff09
\n   \u500b\u3005\u306e\u30ab\u30e9\u30fc\u306b\u5bfe\u3057\u30018bit\u306e\u6df1\u5ea6\u306e\u900f\u660e\u5ea6\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002
\n  b.1,2,4,8,16bit grayscale \u306e\u5834\u5408 \uff08Color type = 0\uff09
\n   \u3042\u308b\u4e00\u3064\u306egrayscale level\u306b\u5bfe\u3057\u30011bit\u306e\u6df1\u5ea6\u306e\u900f\u660e\u5ea6\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002
\n  c.24\/48bit color\u306e\u5834\u5408\uff08Color type = 2)
\n   \u3042\u308b\u4e00\u3064\u306e\u8272\u306b\u5bfe\u3057\u30011bit\u306e\u6df1\u5ea6\u306e\u900f\u660e\u5ea6\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002
\n 
\n(\u4e2d\u7565)
\n 
\n\u307e\u305f\u3001PNG\u306e\u4ed5\u69d8\u306b\u3088\u308b\u3068\u900f\u660e\u5316\u306f\u5fc5\u9808\u3067\u306f\u306a\u3044\u3089\u3057\u3044\u306e\u3067\u3001
\n\u5b9f\u88c5\u306b\u3070\u3089\u3064\u304d\u304c\u3067\u308b\u306e\u306f\u3084\u3080\u3092\u5f97\u306a\u3044\u3067\u3057\u3087\u3046\u3002
\n\u90e8\u5206\u7684\u306a\u5bfe\u5fdc\u3082OK\u3060\u305d\u3046\u3067…\u3002\n<\/p><\/blockquote>\n

– PNG Programming Resources<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

PNG \u306fRGB\u3068\u3068\u3082\u306b\u03b1\u5024\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u534a\u900f\u660e\u8272\u3068\u3044\u3046\u306e\u3082\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002 # a.gif \u306e\u767d(#FFFFFF)\u3092\u534a\u900f\u660e(50%=0x80)\u306b\u3057\u3001b.png \u3068\u3057\u3066\u4fdd\u5b58(\u5165\u529b\u306e\u5f62\u5f0f\u306f\u4efb\u610f\u3067\u3059\u304c\u3001\u51fa\u529b\u306f … \u7d9a\u304d\u3092\u8aad\u3080 ImageMagick \u306e convert \u3067\u534a\u900f\u660e\u306a PNG \u3092\u6271\u3046<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[141],"tags":[56],"class_list":["post-657","post","type-post","status-publish","format-standard","hentry","category-lifehack","tag-imagemagick"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=657"}],"version-history":[{"count":1,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/657\/revisions"}],"predecessor-version":[{"id":1237,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/657\/revisions\/1237"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}