{"id":6775,"date":"2022-10-25T17:10:32","date_gmt":"2022-10-25T09:10:32","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/ja\/?p=6775"},"modified":"2022-10-25T17:11:37","modified_gmt":"2022-10-25T09:11:37","slug":"png-%e3%81%be%e3%81%9f%e3%81%af-jpg-%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e5%bf%85%e8%a6%81%e3%81%8c%e3%81%82%e3%82%8a%e3%81%be%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/ja\/should-i-use-png-or-jpg\/","title":{"rendered":"PNG \u307e\u305f\u306f JPG \u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b?"},"content":{"rendered":"<p>\u4f5c\u6210\u3059\u308b\u3068\u304d\u306f\u3001\u901a\u5e38\u3001\u753b\u50cf\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u3082\u4e00\u822c\u7684\u306a\u753b\u50cf\u5f62\u5f0f\u306f JPG \u3068 PNG \u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u3053\u308c\u3089 2 \u3064\u306e\u5f62\u5f0f\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u5b66\u3073\u3001\u4f5c\u6210\u6642\u306b\u9069\u5207\u306a\u5f62\u5f0f\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11373\" title=\"PNG \u307e\u305f\u306f JPG \u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b?\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/08\/JPG-or-PNG-Page-1-1.png\" alt=\"PNG \u307e\u305f\u306f JPG \u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b?\" width=\"460\" height=\"270\" \/><\/p>\n<h1><span id=\"Understand_more_about_the_image_format\">\u753b\u50cf\u5f62\u5f0f\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u6df1\u3081\u308b<\/span><\/h1>\n<h2><span id=\"What_is_JPG\">JPG\u3068\u306f\uff1f<\/span><\/h2>\n<p>\u73fe\u5728\u306f JPEG \u3068\u3082\u547c\u3070\u308c\u308b JPG \u306f\u3001Joint Photographic Experts Group \u306e\u7565\u3067\u3059\u3002JPEG \u306f\u901a\u5e38\u3001\u307c\u3084\u3051\u306e\u306a\u3044 10:1 \u5727\u7e2e\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u73fe\u5728\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30c7\u30b8\u30bf\u30eb\u753b\u50cf\u5f62\u5f0f\u3067\u3059\u3002<\/p>\n<h2><span id=\"What_is_PNG\">PNG\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/span><\/h2>\n<p>PNG \u306f Portable Network Graphics \u306e\u7565\u3067\u3001\u30d1\u30ec\u30c3\u30c8\u30d9\u30fc\u30b9\u306e\u753b\u50cf\u3068\u900f\u660e\u5ea6\u306e\u5909\u66f4\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u53ef\u9006\u30c7\u30fc\u30bf\u5727\u7e2e\u306b\u4f7f\u7528\u3067\u304d\u308b\u305f\u3081\u3001\u54c1\u8cea\u304c\u6bd4\u8f03\u7684\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002GIF\u3092\u7f6e\u304d\u63db\u3048\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u5370\u5237\u7528\u3067\u306f\u306a\u304f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u305f\u753b\u50cf\u5909\u63db\u306b\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001RGB \u4ee5\u5916\u306e\u8272\u7a7a\u9593\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11374\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/08\/JPG-or-PNG-Page-2-1.png\" alt=\"\" width=\"219\" height=\"182\" \/>\u00a0\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11376\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/08\/JPG-or-PNG-Copy-of-Page-2-1.png\" alt=\"\" width=\"219\" height=\"182\" \/><\/p>\n<h1><span id=\"Comparison_between_JPG_and_PNG\">JPG\u3068PNG\u306e\u6bd4\u8f03<\/span><\/h1>\n<h2><span id=\"Compression_vs_File_Size\">\u5727\u7e2e\u3068\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/span><\/h2>\n<p>\u524d\u8ff0\u306e\u3088\u3046\u306b\u3001PNG \u306f\u30ed\u30b9\u30ec\u30b9 \u30c7\u30fc\u30bf\u5727\u7e2e\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u304c\u3001JPG \u306f\u753b\u8cea\u306e\u4e00\u90e8\u3092\u5931\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001PNG \u753b\u50cf\u306e\u30d5\u30a1\u30a4\u30eb \u30b5\u30a4\u30ba\u306f JPG \u3088\u308a\u3082\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u753b\u50cf\u30b5\u30a4\u30ba\u306e\u5236\u9650\u304c\u3042\u308b\u5834\u5408\u306f\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<h2><span id=\"Transparency\">\u900f\u660e\u5ea6<\/span><\/h2>\n<p>\u753b\u50cf\u306e\u900f\u660e\u5ea6\u306e\u5236\u5fa1\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u306e\u306f PNG \u3060\u3051\u3067\u3059\u3002\u80cc\u666f\u8272\u304c\u30c7\u30b6\u30a4\u30f3\u306b\u5408\u308f\u306a\u3044\u5834\u5408\u304c\u3042\u308b\u305f\u3081\u3001JPG \u306b\u306f\u30d9\u30fc\u30b9 \u30ab\u30e9\u30fc\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e00\u65b9\u3001PNG \u306f\u900f\u660e\u306a\u80cc\u666f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30b7\u30e3\u30fc\u30d7\u3067\u7279\u5b9a\u306e\u8981\u7d20\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8981\u7d20\u306f\u3001\u80cc\u666f\u306b\u7279\u5225\u306a\u7de8\u96c6\u3092\u52a0\u3048\u308b\u3053\u3068\u306a\u304f\u3001\u5225\u306e\u80cc\u666f\u306b\u76f4\u63a5\u914d\u7f6e\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11381\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/08\/JPG-or-PNG-Page-3-1.png\" alt=\"\" width=\"504\" height=\"238\" \/><\/p>\n<p>&nbsp;<\/p>\n<h1><span id=\"When_should_we_use_JPG_or_PNG\">\u3044\u3064JPG\u307e\u305f\u306fPNG\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b<\/span><\/h1>\n<h2><span id=\"When_to_use_JPG\">JPG \u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/span><\/h2>\n<ul>\n<li><strong>\u672c\u7269\u306e\u5199\u771f<\/strong>\u2013 JPG \u3092\u5727\u7e2e\u3059\u308b\u3068\u3001\u5c11\u3057\u307c\u3084\u3051\u307e\u3059\u3002\u3053\u306e\u307c\u3084\u3051\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u80cc\u666f\u306e\u9593\u306e\u7dda\u304c\u3088\u308a\u307c\u3084\u3051\u3001\u753b\u50cf\u304c\u3088\u308a\u30ea\u30a2\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/strong>\u306e\u5236\u9650 \u2013 \u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u305f\u753b\u50cf\u306b\u5236\u9650\u304c\u3042\u308b\u5834\u5408\u3001\u3088\u308a\u5c0f\u3055\u3044 JPG \u304c\u30c7\u30b6\u30a4\u30f3\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u5236\u5fa1\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u30d5\u30a1\u30a4\u30eb \u30b5\u30a4\u30ba\u306f\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u6642\u9593\u306b\u3082\u5f71\u97ff\u3059\u308b\u305f\u3081\u3001JPG \u3092\u4f7f\u7528\u3059\u308b\u3068\u8aad\u307f\u8fbc\u307f\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u3001Web \u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u306e\u30e1\u30c7\u30a3\u30a2\u3092\u8aad\u3080\u3068\u304d\u306e\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8272\u7a7a\u9593<\/strong>\u2013 \u524d\u8ff0\u306e\u3088\u3046\u306b\u3001PNG \u306f\u3001\u5370\u5237\u306b\u4f7f\u7528\u3055\u308c\u308b\u4e00\u822c\u7684\u306a\u8272\u7a7a\u9593\u3067\u3042\u308b CMYK \u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u5370\u5237\u7528\u7d20\u6750\u3092\u3054\u7528\u610f\u3059\u308b\u969b\u306f\u3001PNG\u3067\u306f\u306a\u304fJPG\u3092\u3054\u5229\u7528\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h2><span id=\"When_to_use_PNG\">PNG \u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/span><\/h2>\n<ul>\n<li><strong>\u900f\u660e\u6027\u304c\u5fc5\u8981<\/strong>\u2013 \u8981\u7d20\u3084\u30b0\u30e9\u30d5\u30a3\u30c3\u30af \u30d9\u30fc\u30b9\u306e\u4f5c\u54c1\u3092\u4fdd\u5b58\u3057\u305f\u3044\u5834\u5408\u3001\u753b\u50cf\u3092\u30c7\u30b6\u30a4\u30f3\u3059\u308b\u3068\u304d\u306b\u900f\u660e\u6027\u304c\u5927\u3044\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001[PNG \u3068\u3057\u3066\u4fdd\u5b58] \u3092\u9078\u629e\u3059\u308b\u3068\u3001\u80cc\u666f\u304c\u900f\u660e\u306a\u753b\u50cf\u3092\u4fdd\u5b58\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n<li><strong>\u7de8\u96c6\u304c\u5fc5\u8981<\/strong>\u2013 PNG \u306f\u30ed\u30b9\u30ec\u30b9 \u30c7\u30fc\u30bf\u5727\u7e2e\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u7d99\u7d9a\u7684\u306b\u7de8\u96c6\u3057\u3066\u3082\u753b\u50cf\u306e\u54c1\u8cea\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<h1><span id=\"More_about_JPG_and_PNG\">JPG \u3068 PNG \u306e\u8a73\u7d30<\/span><\/h1>\n<h3><span id=\"Storing_animation\">\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u5b58<\/span><\/h3>\n<p>JPG \u3068 PNG \u306f\u3069\u3061\u3089\u3082\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u5b58\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002PNG \u306f GIF \u3092\u7f6e\u304d\u63db\u3048\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u77ed\u3044\u4f4e\u89e3\u50cf\u5ea6\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b GIF \u306e\u3088\u3046\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u3089\u305a\u3001Web \u30c7\u30b6\u30a4\u30f3\u3067\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002PNG \u306b\u57fa\u3065\u3044\u3066\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u753b\u50cf\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b APNG \u304c\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u307e\u305f\u3001GIF \u3067\u306f\u3067\u304d\u306a\u3044\u80cc\u666f\u304c\u900f\u660e\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u5b58\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002APNG 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