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\n
\"\u300cPNG\u300d\u3068\u300cJPEG\u300d\u306fWeb\u306b\u4f7f\u7528\u3059\u308b\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\"<\/figure><\/div>\n\n\n

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\u300cPNG\u300d\u3068\u300cJPEG\u300d\u306e\u9055\u3044<\/strong><\/h3>\n\n\n\n

PNG\u3068JPEG\u306f\u3001\u3069\u3061\u3089\u3082\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u7279\u5fb4\u3068\u7528\u9014\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u6bd4\u8f03\u9805\u76ee<\/strong><\/th>PNG<\/strong><\/th>JPEG<\/strong><\/th><\/tr><\/thead>
\u6b63\u5f0f\u540d\u79f0<\/td>Portable Network Graphics<\/td>Joint Photographic Experts Group<\/td><\/tr>
\u8aad\u307f\u65b9<\/td>\u30d4\u30f3\u30b0\u3001\u30d4\u30fc\u30a8\u30cc\u30b8\u30fc<\/td>\u30b8\u30a7\u30a4\u30da\u30b0<\/td><\/tr>
\u8272\u6570<\/td>PNG-8: 256\u8272
PNG-24\/32: \u7d041,677\u4e07\u8272<\/td>		\u7d041,677\u4e07\u8272<\/td><\/tr>
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PNG\u306e\u5927\u304d\u306a\u7279\u5fb4\u306f\u300c\u53ef\u9006\u5727\u7e2e\u300d\u3068\u300c\u900f\u904e\u51e6\u7406\u300d\u3067\u3059\u3002\u53ef\u9006\u5727\u7e2e\u3068\u306f\u3001\u5727\u7e2e\u3057\u305f\u753b\u50cf\u3092\u5143\u306e\u30c7\u30fc\u30bf\u306b\u5b8c\u5168\u306b\u5fa9\u5143\u3067\u304d\u308b\u6280\u8853\u3067\u3001\u7de8\u96c6\u3084\u4fdd\u5b58\u3092\u4f55\u5ea6\u7e70\u308a\u8fd4\u3057\u3066\u3082\u753b\u8cea\u304c\u52a3\u5316\u3057\u307e\u305b\u3093\u3002<\/strong>\u307e\u305f\u3001\u80cc\u666f\u3092\u900f\u660e\u306b\u3067\u304d\u308b\u900f\u904e\u6a5f\u80fd\u306f\u3001Web\u30c7\u30b6\u30a4\u30f3\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

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\n
\"PNG\u5f62\u5f0f\u3068\u306f\uff1f\u6d3b\u7528\u30b7\u30fc\u30f3\u3068\u7a2e\u985e\"<\/figure><\/div>\n\n\n

PNG\uff08Portable Network Graphics\uff09\u306f\u30011996\u5e74\u306bGIF\u306e\u4ee3\u66ff\u3068\u3057\u3066\u767b\u5834\u3057\u305f\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u3067\u3059\u3002\u300c\u30d4\u30f3\u30b0\u300d\u307e\u305f\u306f\u300c\u30d4\u30fc\u30a8\u30cc\u30b8\u30fc\u300d\u3068\u8aad\u307e\u308c\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n

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PNG\u30c7\u30fc\u30bf\u304c\u6d3b\u7528\u3055\u308c\u308b\u7528\u9014<\/strong><\/h3>\n\n\n\n

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\u7528\u9014<\/th>\u7279\u5fb4<\/th><\/tr><\/thead>
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\u900f\u904e\u80cc\u666f\u304c\u5fc5\u8981\u306a\u7d20\u6750<\/td>Web\u30b5\u30a4\u30c8\u3067\u80cc\u666f\u3092\u900f\u660e\u306b\u3057\u305f\u3044\u30a2\u30a4\u30b3\u30f3\u3084\u88c5\u98fe\u8981\u7d20<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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PNG\u306e\u7a2e\u985e\uff08PNG-8\u3001PNG-24\u3001PNG-32\uff09<\/strong><\/h3>\n\n\n\n

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PNG-8<\/td>256\u8272<\/td>\u53ef\u80fd\uff08\u5b8c\u5168\u900f\u904e\u306e\u307f\uff09<\/td>\u8efd\u3044<\/td>\u5358\u8272\u30a4\u30e9\u30b9\u30c8\u3001\u30a2\u30a4\u30b3\u30f3\u3001\u30ed\u30b4<\/td><\/tr>
PNG-24<\/td>\u7d041,677\u4e07\u8272<\/td>\u4e0d\u53ef<\/td>\u91cd\u3044<\/td>\u9ad8\u753b\u8cea\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u3001\u5199\u771f<\/td><\/tr>
PNG-32<\/td>\u7d041,677\u4e07\u8272\uff0b\u900f\u904e256\u6bb5\u968e<\/td>\u53ef\u80fd\uff08\u534a\u900f\u660e\u5bfe\u5fdc\uff09<\/td>\u6700\u3082\u91cd\u3044<\/td>\u900f\u904e\u304c\u5fc5\u8981\u306a\u9ad8\u753b\u8cea\u753b\u50cf<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306aPNG\u5f62\u5f0f\u3092\u9078\u3076\u3053\u3068\u3067\u3001\u753b\u8cea\u3068\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

PNG\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong><\/h3>\n\n\n\n

PNG\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u3001\u53ef\u9006\u5727\u7e2e\u65b9\u5f0f\u306e\u63a1\u7528\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/strong>\u3053\u306e\u6280\u8853\u306b\u3088\u308a\u753b\u50cf\u3092\u4f55\u5ea6\u4fdd\u5b58\u3057\u3066\u3082\u54c1\u8cea\u304c\u52a3\u5316\u305b\u305a\u3001\u5143\u306e\u72b6\u614b\u3092\u5b8c\u5168\u306b\u7dad\u6301\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u80cc\u666f\u3092\u900f\u660e\u306b\u3057\u305f\u308a\u3001\u7279\u5b9a\u306e\u90e8\u5206\u3060\u3051\u900f\u660e\u5ea6\u3092\u8abf\u6574\u3057\u305f\u308a\u3067\u304d\u308b\u305f\u3081\u3001Web\u30c7\u30b6\u30a4\u30f3\u3084\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u4f5c\u6210\u306b\u304a\u3044\u3066\u67d4\u8edf\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n

\u4e00\u65b9\u3067PNG\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308a\u304c\u3061\u306a\u70b9\u304c\u6319\u3052\u3089\u308c\u307e\u3059<\/strong>\u3002\u7279\u306bPNG-24\u3084PNG-32\u3067\u30d5\u30eb\u30ab\u30e9\u30fc\u753b\u50cf\u3092\u4fdd\u5b58\u3059\u308b\u3068\u3001\u540c\u7b49\u306e\u753b\u50cf\u3092JPEG\u3067\u4fdd\u5b58\u3057\u305f\u5834\u5408\u3068\u6bd4\u8f03\u3057\u3066\u6570\u500d\u306e\u30b5\u30a4\u30ba\u306b\u306a\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u3053\u308c\u306fWeb\u30b5\u30a4\u30c8\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u640d\u306a\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

JPG\u3068\u306f\uff1f\u6d3b\u7528\u30b7\u30fc\u30f3\u3068\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong><\/h2>\n\n\n
\n
\"JPG\u3068\u306f\uff1f\u6d3b\u7528\u30b7\u30fc\u30f3\u3068\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8\"<\/figure><\/div>\n\n\n

JPG\uff08JPEG\uff09\u306f\u3001Joint Photographic Experts Group\u306e\u7565\u79f0\u3067\u300c\u30b8\u30a7\u30a4\u30da\u30b0\u300d\u3068\u8aad\u307f\u307e\u3059\u3002\u3053\u306e\u753b\u50cf\u5f62\u5f0f\u306f\u3001\u5199\u771f\u3084\u30d5\u30eb\u30ab\u30e9\u30fc\u753b\u50cf\u3092\u52b9\u7387\u7684\u306b\u5727\u7e2e\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u62e1\u5f35\u5b50\u306b\u306f\u300c.jpg\u300d\u3068\u300c.jpeg\u300d\u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u6a5f\u80fd\u7684\u306a\u9055\u3044\u306f\u306a\u304f\u540c\u3058\u3082\u306e\u3068\u8003\u3048\u3066\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n

JPEG\u5f62\u5f0f\u304c\u5e83\u304f\u666e\u53ca\u3057\u3066\u3044\u308b\u7406\u7531\u306f\u3001\u8272\u5f69\u8c4a\u304b\u306a\u753b\u50cf\u3092\u6bd4\u8f03\u7684\u5c0f\u3055\u306a\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306b\u5727\u7e2e\u3067\u304d\u308b\u70b9\u306b\u3042\u308a\u307e\u3059\u3002\u5727\u7e2e\u7387\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001\u753b\u8cea\u3068\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u7528\u9014\u306b\u5fdc\u3058\u3066\u6700\u9069\u5316\u3067\u304d\u308b\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n\n\n\n

JPG\u30d5\u30a1\u30a4\u30eb\u304c\u6d3b\u7528\u3055\u308c\u308b\u7528\u9014<\/strong><\/h3>\n\n\n\n

\u5199\u771f\u3084\u81ea\u7136\u753b\u50cf\u306e\u4fdd\u5b58\u306b\u6700\u3082\u9069\u3057\u305f\u5f62\u5f0f\u304cJPEG\u3067\u3059\u3002\u7d041,677\u4e07\u8272\uff08\u30d5\u30eb\u30ab\u30e9\u30fc\uff09\u3092\u8868\u73fe\u3067\u304d\u308b\u305f\u3081\u3001\u98a8\u666f\u5199\u771f\u3084\u4eba\u7269\u5199\u771f\u306a\u3069\u306e\u7e4a\u7d30\u306a\u8272\u5408\u3044\u3084\u5fae\u5999\u306a\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u7f8e\u3057\u304f\u518d\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

Web\u30b5\u30a4\u30c8\u3067\u306e\u753b\u50cf\u8868\u793a\u306b\u304a\u3044\u3066\u3082\u3001\u7279\u306b\u5199\u771f\u30d9\u30fc\u30b9\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\uff08\u30d6\u30ed\u30b0\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\u3001\u5546\u54c1\u5199\u771f\u3001\u30d2\u30fc\u30ed\u30fc\u753b\u50cf\u306a\u3069\uff09\u306b\u6700\u9069\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n

\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u5c0f\u3055\u304f\u6291\u3048\u3089\u308c\u308b\u305f\u3081\u3001\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u5411\u4e0a\u306b\u8ca2\u732e\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u6539\u5584\u3084SEO\u8a55\u4fa1\u306e\u5411\u4e0a\u306b\u3082\u3064\u306a\u304c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

JPEG\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong><\/h3>\n\n\n\n

JPEG\u306e\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u30d5\u30eb\u30ab\u30e9\u30fc\uff08\u7d041,677\u4e07\u8272\uff09\u306b\u5bfe\u5fdc\u3057\u306a\u304c\u3089\u3001\u52b9\u7387\u7684\u306a\u5727\u7e2e\u304c\u53ef\u80fd\u306a\u70b9\u3067\u3059\u3002<\/strong>\u4eba\u9593\u306e\u76ee\u3067\u306f\u8b58\u5225\u3057\u306b\u304f\u3044\u8272\u60c5\u5831\u3092\u9593\u5f15\u304f\u3053\u3068\u3067\u3001\u8996\u899a\u7684\u306a\u54c1\u8cea\u3092\u3042\u308b\u7a0b\u5ea6\u7dad\u6301\u3057\u306a\u304c\u3089\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5143\u306e\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u304b\u308910\u5206\u306e1\u7a0b\u5ea6\u307e\u3067\u5727\u7e2e\u3057\u3066\u3082\u3001\u4e00\u822c\u7684\u306a\u7528\u9014\u3067\u306f\u5341\u5206\u306a\u753b\u8cea\u3092\u4fdd\u3066\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

\u307e\u305f\u3001JPEG\u306f\u3042\u3089\u3086\u308b\u30c7\u30d0\u30a4\u30b9\u3084\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u5e83\u304f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u4e92\u63db\u6027\u306e\u5fc3\u914d\u304c\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u306a\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u9593\u3067\u3082\u554f\u984c\u306a\u304f\u753b\u50cf\u3092\u5171\u6709\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u4e00\u65b9\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u300c\u975e\u53ef\u9006\u5727\u7e2e\u300d\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002<\/strong>\u3053\u308c\u306f\u4e00\u5ea6\u5727\u7e2e\u3059\u308b\u3068\u3001\u524a\u9664\u3055\u308c\u305f\u60c5\u5831\u306f\u6c38\u4e45\u306b\u5931\u308f\u308c\u3001\u5143\u306e\u753b\u8cea\u306b\u5b8c\u5168\u306b\u623b\u3059\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u540c\u3058JPEG\u753b\u50cf\u3092\u4f55\u5ea6\u3082\u7de8\u96c6\u30fb\u4fdd\u5b58\u3092\u7e70\u308a\u8fd4\u3059\u3068\u3001\u753b\u8cea\u304c\u5f90\u3005\u306b\u52a3\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u91cd\u8981\u306a\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u7de8\u96c6\u7528\u306b\u5225\u5f62\u5f0f\u3067\u539f\u672c\u3092\u4fdd\u5b58\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

PNG\u3068JPEG\u306e\u9055\u3044\u3092\u6bd4\u8f03<\/strong><\/h2>\n\n\n
\n
\"PNG\u3068JPEG\u306e\u9055\u3044\u3092\u6bd4\u8f03\"<\/figure><\/div>\n\n\n

Web\u30b5\u30a4\u30c8\u3084\u30d6\u30ed\u30b0\u8a18\u4e8b\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u5236\u4f5c\u306b\u304a\u3044\u3066\u3001\u753b\u50cf\u306e\u6271\u3044\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u8aad\u8005\u306b\u9b45\u529b\u7684\u306a\u8996\u899a\u4f53\u9a13\u3092\u63d0\u4f9b\u3059\u308b\u3068\u540c\u6642\u306b\u3001\u30b5\u30a4\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3082\u914d\u616e\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n

\u305d\u3053\u3067\u9375\u3068\u306a\u308b\u306e\u304c\u3001\u76ee\u7684\u306b\u9069\u3057\u305f\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9078\u629e\u3067\u3059\u3002\u5148\u8ff0\u3057\u305fPNG\u3068JPEG\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u3069\u3061\u3089\u3092\u9078\u3079\u3070\u3088\u3044\u306e\u304b\u3001\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

\u4f01\u696d\u306e\u30ed\u30b4\u3084\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30a2\u30a4\u30b3\u30f3\u306a\u3069\u3001\u8272\u6570\u304c\u5c11\u306a\u304f\u8f2a\u90ed\u304c\u306f\u3063\u304d\u308a\u3057\u305f\u753b\u50cf\u306b\u306fPNG\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u80cc\u666f\u304c\u5909\u308f\u308b\u5834\u6240\u306b\u914d\u7f6e\u3059\u308b\u5834\u5408\u3001\u900f\u904e\u6a5f\u80fd\u304c\u91cd\u5b9d\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30c6\u30ad\u30b9\u30c8\u3084\u7dda\u304c\u591a\u3044\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001PNG\u3067\u4fdd\u5b58\u3059\u308b\u3068\u30a8\u30c3\u30b8\u304c\u30b7\u30e3\u30fc\u30d7\u306b\u8868\u793a\u3055\u308c\u3001\u8aad\u307f\u3084\u3059\u3055\u304c\u4fdd\u305f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

\u98a8\u666f\u3084\u4eba\u7269\u306e\u5199\u771f\u3001\u5546\u54c1\u753b\u50cf\u306a\u3069\u8272\u5f69\u8c4a\u304b\u306a\u5199\u771f\u306f\u3001JPEG\u3067\u52b9\u7387\u3088\u304f\u5727\u7e2e\u3067\u304d\u307e\u3059\u3002\u7279\u306bWeb\u7528\u9014\u3067\u306f\u3001\u9069\u5207\u306a\u5727\u7e2e\u7387\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u8996\u899a\u7684\u54c1\u8cea\u3092\u4fdd\u3061\u306a\u304c\u3089\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u5c0f\u3055\u304f\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u307e\u305f\u3001 \u30d6\u30ed\u30b0\u306a\u3069\u8a18\u4e8b\u306e\u5192\u982d\u306b\u5927\u304d\u304f\u8868\u793a\u3055\u308c\u308b\u753b\u50cf\u306f\u3001\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u3092\u8003\u616e\u3057\u3066\u6700\u9069\u5316\u3055\u308c\u305fJPEG\u3092\u7528\u3044\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n

\u305d\u306e\u4ed6\u306e\u753b\u50cf\u5f62\u5f0f\uff08GIF\u3001TIFF\u3001BMP\u3001WebP\uff09<\/strong><\/h2>\n\n\n
\n
\"\u305d\u306e\u4ed6\u306e\u753b\u50cf\u5f62\u5f0f\uff08GIF\u3001TIFF\u3001BMP\u3001WebP\uff09\"<\/figure><\/div>\n\n\n

\u30b3\u30f3\u30c6\u30f3\u30c4\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3067\u52b9\u679c\u7684\u306a\u8996\u899a\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u753b\u50cf\u5f62\u5f0f\u306e\u7279\u6027\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

JPEG\u3068PNG\u304c\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u5f62\u5f0f\u3067\u3059\u304c\u3001\u4ed6\u306b\u3082\u7279\u5b9a\u306e\u7528\u9014\u306b\u9069\u3057\u305f\u753b\u50cf\u5f62\u5f0f\u304c\u5b58\u5728\u3057\u307e\u3059\u3002GIF\u3001TIFF\u3001BMP\u3001WebP\u3068\u3044\u3063\u305f\u4ee3\u8868\u7684\u306a\u753b\u50cf\u5f62\u5f0f\u306b\u3064\u3044\u3066\u3001\u7279\u5fb4\u306a\u3069\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

\u5f62\u5f0f<\/strong><\/th>\u8272\u6570<\/strong><\/th>\u5727\u7e2e\u65b9\u5f0f<\/strong><\/th>\u900f\u904e\u51e6\u7406<\/strong><\/th>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/strong><\/th>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/strong><\/th>\u4e3b\u306a\u7528\u9014<\/strong><\/th><\/tr><\/thead>
GIF<\/td>256\u8272<\/td>\u53ef\u9006\u5727\u7e2e<\/td>\u5bfe\u5fdc\uff08\u5b8c\u5168\u900f\u660e\u306e\u307f\uff09<\/td>\u5bfe\u5fdc<\/td>\u5c0f\u301c\u4e2d<\/td>\u30b7\u30f3\u30d7\u30eb\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3001\u30a2\u30a4\u30b3\u30f3<\/td><\/tr>
TIFF<\/td>\u30d5\u30eb\u30ab\u30e9\u30fc<\/td>\u53ef\u9006\uff0f\u975e\u53ef\u9006\u9078\u629e\u53ef<\/td>\u5bfe\u5fdc<\/td>\u975e\u5bfe\u5fdc<\/td>\u975e\u5e38\u306b\u5927\u304d\u3044<\/td>\u5370\u5237\u3001\u9ad8\u54c1\u8cea\u5199\u771f\u306e\u4fdd\u5b58<\/td><\/tr>
BMP<\/td>\u30d5\u30eb\u30ab\u30e9\u30fc<\/td>\u975e\u5727\u7e2e<\/td>\u4e00\u90e8\u5bfe\u5fdc<\/td>\u975e\u5bfe\u5fdc<\/td>\u975e\u5e38\u306b\u5927\u304d\u3044<\/td>\u30b7\u30b9\u30c6\u30e0\u753b\u50cf\u3001\u4e2d\u9593\u30d5\u30a1\u30a4\u30eb<\/td><\/tr>
WebP<\/td>\u30d5\u30eb\u30ab\u30e9\u30fc<\/td>\u53ef\u9006\/\u975e\u53ef\u9006\u9078\u629e\u53ef<\/td>\u5bfe\u5fdc<\/td>\u5bfe\u5fdc<\/td>\u5c0f\uff08\u6700\u3082\u52b9\u7387\u7684\uff09<\/td>Web\u30b5\u30a4\u30c8\u3001\u30a2\u30d7\u30ea\u753b\u50cf<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

GIF\u306f\u300cGraphics Interchange Format\u300d\u306e\u7565\u79f0\u3067\u30011987\u5e74\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u5f62\u5f0f\u306f\u3001256\u8272\u3068\u3044\u3046\u9650\u3089\u308c\u305f\u8272\u6570\u3067\u69cb\u6210\u3055\u308c\u308b\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002GIF\u306e\u6700\u5927\u306e\u7279\u5fb4\u306f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u3002\u8907\u6570\u306e\u30d5\u30ec\u30fc\u30e0\u30921\u3064\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u683c\u7d0d\u3057\u3001\u9023\u7d9a\u8868\u793a\u3059\u308b\u3053\u3068\u3067\u52d5\u304d\u306e\u3042\u308b\u753b\u50cf\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

TIFF\u306f\u300cTagged Image File Format\u300d\u306e\u7565\u3067\u3001\u62e1\u5f35\u5b50\u306f\u300c.tif\u300d\u307e\u305f\u306f\u300c.tiff\u300d\u3067\u3059\u3002TIFF\u306e\u6700\u5927\u306e\u7279\u5fb4\u306f\u3001\u975e\u5e38\u306b\u9ad8\u3044\u753b\u8cea\u3092\u4fdd\u6301\u3067\u304d\u308b\u70b9\u306b\u3042\u308a\u307e\u3059\u3002\u53ef\u9006\u5727\u7e2e\u65b9\u5f0f\u3092\u63a1\u7528\u3057\u3066\u304a\u308a\u3001\u60c5\u5831\u640d\u5931\u306a\u304f\u753b\u50cf\u3092\u4fdd\u5b58\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

BMP\u306f\u300cBitmap\u300d\u306e\u7565\u3067\u3001\u300c\u30d3\u30c3\u30c8\u30de\u30c3\u30d7\u300d\u307e\u305f\u306f\u300c\u30d3\u30fc\u30a8\u30e0\u30d4\u30fc\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u30de\u30a4\u30af\u30ed\u30bd\u30d5\u30c8\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u305f\u3053\u306e\u5f62\u5f0f\u306e\u7279\u5fb4\u306f\u3001\u5727\u7e2e\u3092\u884c\u308f\u306a\u3044\u300c\u975e\u5727\u7e2e\u300d\u5f62\u5f0f\u3067\u3042\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u753b\u7d20\u3054\u3068\u306e\u8272\u60c5\u5831\u3092\u305d\u306e\u307e\u307e\u4fdd\u5b58\u3059\u308b\u305f\u3081\u3001\u60c5\u5831\u306e\u640d\u5931\u304c\u306a\u304f\u3001\u9ad8\u3044\u753b\u8cea\u3092\u7dad\u6301\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

WebP\u306f2010\u5e74\u306bGoogle\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u305f\u6bd4\u8f03\u7684\u65b0\u3057\u3044\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002\u300c\u30a6\u30a7\u30c3\u30d4\u30fc\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002WebP\u306e\u6700\u5927\u306e\u7279\u5fb4\u306f\u3001JPEG\u306b\u6bd4\u3079\u3066\u7d0430%\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u540c\u7b49\u4ee5\u4e0a\u306e\u8996\u899a\u7684\u54c1\u8cea\u3092\u5b9f\u73fe\u3067\u304d\u308b\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n

\u753b\u50cf\u5f62\u5f0f\u9078\u629e\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/h2>\n\n\n
\n
\"\u753b\u50cf\u5f62\u5f0f\u9078\u629e\u306e\u30dd\u30a4\u30f3\u30c8\"<\/figure><\/div>\n\n\n

\u52b9\u679c\u7684\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u753b\u50cf\u5f62\u5f0f\u306e\u9078\u629e\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002PNG\u3068JPEG\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u753b\u50cf\u5f62\u5f0f\u306b\u306f\u305d\u308c\u305e\u308c\u7279\u6027\u304c\u3042\u308a\u3001\u4f7f\u7528\u76ee\u7684\u306b\u5408\u308f\u305b\u3066\u6700\u9069\u306a\u5f62\u5f0f\u3092\u9078\u3076\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

Web\u7528\u9014\u3067\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong><\/h3>\n\n\n\n

Web\u30b5\u30a4\u30c8\u3084\u30bd\u30fc\u30b7\u30e3\u30eb\u30e1\u30c7\u30a3\u30a2\u3067\u306e\u753b\u50cf\u4f7f\u7528\u306b\u304a\u3044\u3066\u306f\u3001\u8868\u793a\u901f\u5ea6\u3068\u8996\u899a\u7684\u54c1\u8cea\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u91cd\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u753b\u50cf\u5f62\u5f0f\u306e\u9078\u629e\u3068\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a\u3068SEO\u8a55\u4fa1\u306e\u6539\u5584\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u98a8\u666f\u5199\u771f\u3084\u4eba\u7269\u5199\u771f\u3001\u5546\u54c1\u753b\u50cf\u306a\u3069\u8272\u5f69\u8c4a\u304b\u306a\u5199\u771f\u306b\u306fJPEG\u5f62\u5f0f\u3092\u7528\u3044\u3066\u3001\u4f01\u696d\u30ed\u30b4\u3084\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30a2\u30a4\u30b3\u30f3\u306a\u3069\u3001\u8272\u6570\u304c\u5c11\u306a\u304f\u8f2a\u90ed\u304c\u306f\u3063\u304d\u308a\u3057\u305f\u753b\u50cf\u306b\u306f\u3001PNG\u5f62\u5f0f\u3092\u7528\u3044\u308b\u306a\u3069\u3001\u4f7f\u3044\u5206\u3051\u304c\u5fc5\u8981\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n

\u307e\u305f\u3001\u6700\u65b0\u306e\u30d6\u30e9\u30a6\u30b6\u3068\u306e\u4e92\u63db\u6027\u304c\u78ba\u4fdd\u3067\u304d\u308b\u74b0\u5883\u3067\u306f\u3001WebP\u306a\u3069\u306e\u6b21\u4e16\u4ee3\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6d3b\u7528\u3082\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002WebP\u306fJPEG\u3088\u308a\u3082\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u540c\u7b49\u4ee5\u4e0a\u306e\u8996\u899a\u7684\u54c1\u8cea\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u5370\u5237\u7269\u3067\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong><\/h3>\n\n\n\n

\u5370\u5237\u7269\u7528\u306e\u753b\u50cf\u9078\u629e\u306f\u3001Web\u7528\u9014\u3068\u306f\u7570\u306a\u308b\u57fa\u6e96\u3067\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9ad8\u89e3\u50cf\u5ea6\u3068\u8272\u518d\u73fe\u6027\u304c\u91cd\u8996\u3055\u308c\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3088\u308a\u3082\u753b\u8cea\u304c\u512a\u5148\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n

\u5370\u5237\u7269\u3067\u306e\u753b\u50cf\u4f7f\u7528\u306b\u304a\u3044\u3066\u306f\u3001\u89e3\u50cf\u5ea6\uff08DPI\uff1aDots Per Inch\uff09\u304c\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u308a\u307e\u3059\u3002\u901a\u5e38\u3001Web\u8868\u793a\u3067\u306f72\u301c96dpi\u3067\u5341\u5206\u3067\u3059\u304c\u3001\u5370\u5237\u7269\u3067\u306f300dpi\u4ee5\u4e0a\u306e\u9ad8\u89e3\u50cf\u5ea6\u304c\u6c42\u3081\u3089\u308c\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u5370\u5237\u5a92\u4f53\u306e\u7279\u6027\u3068\u8996\u8a8d\u8ddd\u96e2\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u96d1\u8a8c\u3001\u30ab\u30bf\u30ed\u30b0\u3001\u30dd\u30b9\u30bf\u30fc\u306a\u3069\u306e\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u5370\u5237\u7269\u306b\u306f\u3001TIFF\u5f62\u5f0f\u304c\u6700\u9069\u3067\u3059<\/strong>\u3002<\/p>\n\n\n\n

\u793e\u5185\u8cc7\u6599\u3084\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u8cc7\u6599\u306a\u3069\u3001\u30aa\u30d5\u30a3\u30b9\u30d7\u30ea\u30f3\u30bf\u30fc\u3067\u5370\u5237\u3059\u308b\u5834\u5408\u306f\u3001JPEG\u5f62\u5f0f\u3067\u3082\u5341\u5206\u306a\u5834\u5408\u304c\u591a\u3044\u3067\u3059<\/strong>\u3002\u7528\u9014\u306b\u5fdc\u3058\u3066\u3001\u753b\u50cf\u3092\u5909\u63db\u3059\u308b\u306a\u3069\u3057\u3066\u5bfe\u5fdc\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

\u5f62\u5f0f\u3092\u5909\u63db\u3057\u3066\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong><\/h3>\n\n\n\n

\u753b\u50cf\u5f62\u5f0f\u306e\u5909\u63db\u306f\u3001\u5143\u306e\u30c7\u30fc\u30bf\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u7570\u306a\u308b\u5727\u7e2e\u65b9\u5f0f\u9593\u306e\u5909\u63db\u3067\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n

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