\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u3069\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3059\u306e\u304b\uff1f
\n\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u3001\u30c7\u30b8\u30bf\u30eb\u753b\u50cf\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u91cd\u8981\u306a\u6280\u8853\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306b\u305d\u306e\u5229\u70b9\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u6839\u62e0\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
1. \u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u306e\u7bc0\u7d04<\/p>\n
\u753b\u50cf\u5727\u7e2e\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u4fdd\u5b58\u3059\u308b\u969b\u306b\u5fc5\u8981\u306a\u5bb9\u91cf\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002<\/p>\n
JPEG\u3084PNG\u306a\u3069\u306e\u5727\u7e2e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u54c1\u8cea\u306a\u753b\u50cf\u3092\u6bd4\u8f03\u7684\u5c11\u306a\u3044\u30b5\u30a4\u30ba\u3067\u4fdd\u5b58\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001\u500b\u4eba\u306e\u30c7\u30d0\u30a4\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u30af\u30e9\u30a6\u30c9\u30b9\u30c8\u30ec\u30fc\u30b8\u30b5\u30fc\u30d3\u30b9\u3067\u3082\u7ba1\u7406\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u6839\u62e0 \u4f8b\u3048\u3070\u3001JPEG\u5727\u7e2e\u3067\u306f\u975e\u53ef\u9006\u5727\u7e2e\u6280\u8853\u304c\u5229\u7528\u3055\u308c\u3066\u304a\u308a\u3001\u8996\u899a\u7684\u54c1\u8cea\u3092\u4fdd\u3061\u306a\u304c\u3089\u30c7\u30fc\u30bf\u5bb9\u91cf\u3092\u8457\u3057\u304f\u6e1b\u5c11\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3046\u4f01\u696d\u3084\u30a6\u30a7\u30d6\u30b5\u30fc\u30d3\u30b9\u306b\u304a\u3044\u3066\u3001\u30a4\u30f3\u30d5\u30e9\u30b3\u30b9\u30c8\u306e\u524a\u6e1b\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n
2. \u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/p>\n
\u753b\u50cf\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n
\u30da\u30fc\u30b8\u30ed\u30fc\u30c9\u304c\u901f\u304f\u306a\u308b\u3068\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u304c\u6539\u5584\u3055\u308c\u3001\u8a2a\u554f\u8005\u306e\u96e2\u8131\u7387\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u306e\u8a55\u4fa1\u306b\u3082\u597d\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u6839\u62e0 Google\u306e\u8abf\u67fb\u306b\u3088\u308c\u3070\u3001\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u304c3\u79d2\u4ee5\u4e0a\u304b\u304b\u308b\u3068\u3001\u8a2a\u554f\u8005\u306e53%\u304c\u30da\u30fc\u30b8\u3092\u96e2\u308c\u308b\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u5727\u7e2e\u3055\u308c\u305f\u753b\u50cf\u306f\u5e2f\u57df\u5e45\u4f7f\u7528\u7387\u3092\u6e1b\u5c11\u3055\u305b\u3001\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3092\u3088\u308a\u8fc5\u901f\u306b\u914d\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
3. \u5e2f\u57df\u5e45\u306e\u7bc0\u7d04<\/p>\n
\u753b\u50cf\u3092\u52b9\u7387\u3088\u304f\u5727\u7e2e\u3059\u308b\u3053\u3068\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u3066\u753b\u50cf\u3092\u9001\u4fe1\u3059\u308b\u969b\u306e\u30c7\u30fc\u30bf\u8ee2\u9001\u91cf\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u30c7\u30fc\u30bf\u30d7\u30e9\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u3001\u30c7\u30fc\u30bf\u4f7f\u7528\u91cf\u306e\u7bc0\u7d04\u306f\u76f4\u63a5\u7684\u306a\u30b3\u30b9\u30c8\u7bc0\u7d04\u306b\u7e4b\u304c\u308a\u307e\u3059\u3002<\/p>\n
\u6839\u62e0 \u5727\u7e2e\u6280\u8853\u306b\u3088\u308a\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u304c\u6e1b\u5c11\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u6700\u9069\u5316\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u3001\u7279\u306b\u30e2\u30d0\u30a4\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3084\u4f4e\u5e2f\u57df\u5e45\u306e\u74b0\u5883\u4e0b\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u5229\u70b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
4. \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304a\u3088\u3073\u8ee2\u9001\u6642\u9593\u306e\u77ed\u7e2e<\/p>\n
\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u53d6\u308b\u969b\u3084\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u3066\u753b\u50cf\u3092\u8ee2\u9001\u3059\u308b\u969b\u306b\u3001\u5727\u7e2e\u753b\u50cf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u6240\u8981\u6642\u9593\u3092\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u6839\u62e0 \u5727\u7e2e\u3055\u308c\u305f\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306f\u5bb9\u91cf\u304c\u5c0f\u3055\u3044\u305f\u3081\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u4e2d\u306eI\/O\u64cd\u4f5c\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8ee2\u9001\u6642\u306e\u9045\u5ef6\u304c\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u4f01\u696d\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6226\u7565\u3084\u30c7\u30fc\u30bf\u5fa9\u65e7\u8a08\u753b\u306b\u304a\u3044\u3066\u3001\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n
5. \u30b7\u30b9\u30c6\u30e0\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u5229\u7528<\/p>\n
\u5c11\u306a\u3044\u30ea\u30bd\u30fc\u30b9\u3067\u9ad8\u54c1\u8cea\u306a\u753b\u50cf\u304c\u5229\u7528\u3067\u304d\u308b\u305f\u3081\u3001\u753b\u50cf\u51e6\u7406\u304c\u5fc5\u8981\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u4f8b \u753b\u50cf\u7de8\u96c6\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3084\u30b2\u30fc\u30e0\u306a\u3069\uff09\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n
\u6839\u62e0 \u5727\u7e2e\u3055\u308c\u305f\u753b\u50cf\u306f\u30e1\u30e2\u30ea\u3084CPU\u30b5\u30a4\u30af\u30eb\u306e\u52b9\u7387\u7684\u4f7f\u7528\u3092\u53ef\u80fd\u306b\u3057\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51e6\u7406\u3092\u5fc5\u8981\u3068\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001\u30ea\u30bd\u30fc\u30b9\u8ca0\u8377\u306e\u8efd\u6e1b\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u3089\u306e\u30e1\u30ea\u30c3\u30c8\u306b\u3088\u308a\u3001\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u306e\u7bc0\u7d04\u3001\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u306e\u5411\u4e0a\u3001\u30b3\u30b9\u30c8\u524a\u6e1b\u3001\u696d\u52d9\u52b9\u7387\u306e\u5411\u4e0a\u306a\u3069\u3001\u30d3\u30b8\u30cd\u30b9\u3068\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u4e21\u9762\u3067\u5e83\u304f\u5229\u70b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n
\u3057\u305f\u304c\u3063\u3066\u3001\u753b\u50cf\u3092\u4f7f\u7528\u3059\u308b\u3042\u3089\u3086\u308b\u9818\u57df\u3067\u6b20\u304b\u305b\u306a\u3044\u6280\u8853\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3069\u306e\u3088\u3046\u306a\u65b9\u6cd5\u3084\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u753b\u50cf\u3092\u52b9\u7387\u7684\u306b\u5727\u7e2e\u3067\u304d\u308b\u306e\u304b\uff1f
\n\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u3001\u30c7\u30b8\u30bf\u30eb\u30e1\u30c7\u30a3\u30a2\u7ba1\u7406\u306e\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306b\u3001\u753b\u50cf\u3092\u52b9\u7387\u7684\u306b\u5727\u7e2e\u3057\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u3084\u30c4\u30fc\u30eb\u3092\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
1. \u5727\u7e2e\u306e\u57fa\u672c<\/p>\n
\u30ed\u30b9\u30ec\u30b9\u5727\u7e2e \u753b\u50cf\u306e\u54c1\u8cea\u3092\u4fdd\u3061\u306a\u304c\u3089\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u524a\u6e1b\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n
PNG\u3084GIF\u306a\u3069\u304c\u4ee3\u8868\u7684\u3067\u3001\u30c7\u30fc\u30bf\u306e\u5b8c\u5168\u6027\u3068\u54c1\u8cea\u304c\u91cd\u8981\u306a\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u30ed\u30b9\u5727\u7e2e \u54c1\u8cea\u306e\u4e00\u90e8\u3092\u72a0\u7272\u306b\u3057\u306a\u304c\u3089\u5927\u5e45\u306b\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u6e1b\u3089\u3059\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n
JPEG\u304c\u305d\u306e\u4f8b\u3067\u3001\u30a6\u30a7\u30d6\u306b\u304a\u3051\u308b\u5199\u771f\u306e\u6700\u9069\u5316\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n
2. \u5727\u7e2e\u30c4\u30fc\u30eb\u3068\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2<\/p>\n
Adobe Photoshop \u300c\u4fdd\u5b58\u6642\u306bWeb\u7528\u306b\u4fdd\u5b58\u300d\u6a5f\u80fd\u306b\u3088\u308a\u3001JPEG\u3084PNG\u306e\u54c1\u8cea\u3092\u8abf\u6574\u3057\u306a\u304c\u3089\u5727\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n
GIMP \u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30a4\u30e1\u30fc\u30b8\u7de8\u96c6\u30bd\u30d5\u30c8\u3067\u3001\u753b\u50cf\u306e\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u6642\u306b\u5727\u7e2e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n
TinyPNG Web\u30d9\u30fc\u30b9\u306e\u30c4\u30fc\u30eb\u3067\u3001PNG\u3068JPEG\u3092\u52b9\u679c\u7684\u306b\u5727\u7e2e\u3059\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n
ImageOptim Mac\u5411\u3051\u306e\u30a2\u30d7\u30ea\u3067\u3001JPEG\u3001PNG\u3001GIF\u3092\u7c21\u5358\u306b\u5727\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n
3. \u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u3068\u30b9\u30af\u30ea\u30d7\u30c8<\/p>\n
gulp-imagemin Gulp\u3092\u4f7f\u7528\u3057\u305f\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3067\u3001\u753b\u50cf\u5727\u7e2e\u3092\u81ea\u52d5\u5316\u3057\u307e\u3059\u3002<\/p>\n
\u591a\u304f\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u958b\u767a\u74b0\u5883\u3067\u4fbf\u5229\u3067\u3059\u3002<\/p>\n
Webpack Loaders Webpack\u74b0\u5883\u3067\u753b\u50cf\u3092\u5727\u7e2e\u30fb\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u30ed\u30fc\u30c0\u30fc\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n
4. \u6700\u9069\u5316\u6280\u8853<\/p>\n
\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9078\u629e \u4f7f\u7528\u76ee\u7684\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u9078\u3076\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n
\u305f\u3068\u3048\u3070\u3001\u900f\u660e\u5ea6\u304c\u5fc5\u8981\u306a\u5834\u5408\u306fPNG\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u5199\u771f\u753b\u50cf\u3067\u306fJPEG\u304c\u512a\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u753b\u7d20\u6570\u306e\u8abf\u6574 \u76ee\u7684\u306b\u5408\u3063\u305f\u9069\u5207\u306a\u89e3\u50cf\u5ea6\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5287\u7684\u306b\u6e1b\u5c11\u3057\u307e\u3059\u3002<\/p>\n
\u30a6\u30a7\u30d6\u7528\u306a\u308972DPI\u306a\u3069\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n
\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\uff08Lazy Loading\uff09 \u30da\u30fc\u30b8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6539\u5584\u3059\u308b\u305f\u3081\u306b\u3001\u8868\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u753b\u50cf\u3092\u9045\u5ef6\u3057\u3066\u8aad\u307f\u8fbc\u3080\u624b\u6cd5\u3067\u3059\u3002<\/p>\n
5. WebP\u3068\u6b21\u4e16\u4ee3\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/p>\n
WebP Google\u304c\u958b\u767a\u3057\u305f\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3001\u5f93\u6765\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u6bd4\u8f03\u3057\u3066\u540c\u7b49\u306e\u54c1\u8cea\u3067\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n
AVIF \u3088\u308a\u65b0\u3057\u3044\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3001\u5727\u7e2e\u7387\u304c\u9ad8\u304f\u3001\u7279\u306b\u5927\u304d\u306a\u753b\u50cf\u306b\u5bfe\u3057\u3066\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n
6. \u6839\u62e0\u3068\u53c2\u8003\u8cc7\u6599<\/p>\n
\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u3084\u65b9\u6cd5\u306f\u3001\u591a\u304f\u306e\u30a6\u30a7\u30d6\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u3084\u30c7\u30b6\u30a4\u30ca\u30fc\u306b\u5e83\u304f\u652f\u6301\u3055\u308c\u3066\u304a\u308a\u3001\u4e3b\u6d41\u306e\u6280\u8853\u30d6\u30ed\u30b0\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3082\u983b\u7e41\u306b\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u5727\u7e2e\u6280\u8853\u306e\u9078\u5b9a\u306f\u3001\u76ee\u7684\u3084\u4f7f\u7528\u74b0\u5883\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u307e\u3059\u304c\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u5411\u4e0a\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8ca0\u8377\u8efd\u6e1b\u306b\u5927\u304d\u304f\u5bc4\u4e0e\u3057\u307e\u3059\u3002<\/p>\n
\u305f\u3068\u3048\u3070\u3001PageSpeed Insights\u3067\u306f\u3001\u753b\u50cf\u306e\u6700\u9069\u5316\u304c\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u901f\u5ea6\u5411\u4e0a\u306e\u305f\u3081\u306e\u4e3b\u8981\u8981\u7d20\u3068\u3057\u3066\u6319\u3052\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u3001\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u591a\u304f\u306e\u30c4\u30fc\u30eb\u3084\u624b\u6cd5\u306b\u652f\u3048\u3089\u308c\u3066\u304a\u308a\u3001\u5229\u7528\u76ee\u7684\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u9078\u629e\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3092\u9ad8\u3081\u3001\u30ea\u30bd\u30fc\u30b9\u3092\u7bc0\u7d04\u3057\u306a\u304c\u3089\u52b9\u679c\u7684\u306b\u30c7\u30b8\u30bf\u30eb\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u7ba1\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u5727\u7e2e\u5f8c\u306e\u753b\u50cf\u54c1\u8cea\u3092\u3069\u306e\u3088\u3046\u306b\u8a55\u4fa1\u3057\u3001\u6700\u9069\u5316\u3092\u56f3\u308b\u306e\u304b\uff1f
\n\u753b\u50cf\u5727\u7e2e\u3068\u6700\u9069\u5316\u306f\u3001\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u3092\u7e2e\u5c0f\u3057\u3064\u3064\u3001\u8996\u899a\u7684\u306a\u54c1\u8cea\u3092\u3067\u304d\u308b\u3060\u3051\u7dad\u6301\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u3092\u8a55\u4fa1\u3057\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u624b\u6cd5\u3092\u4ee5\u4e0b\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
1. \u5727\u7e2e\u5f8c\u306e\u753b\u50cf\u54c1\u8cea\u8a55\u4fa1<\/p>\n
\u753b\u50cf\u54c1\u8cea\u3092\u8a55\u4fa1\u3059\u308b\u4e3b\u306a\u65b9\u6cd5\u306b\u306f\u3001\u4e3b\u89b3\u7684\u8a55\u4fa1\u3068\u5ba2\u89b3\u7684\u8a55\u4fa1\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4e3b\u89b3\u7684\u8a55\u4fa1<\/p>\n
\u8996\u899a\u8a55\u4fa1 \u4eba\u9593\u306e\u76ee\u306b\u3088\u308b\u8a55\u4fa1\u304c\u6700\u3082\u76f4\u611f\u7684\u3067\u3059\u3002<\/p>\n
\u753b\u50cf\u3092\u30e2\u30cb\u30bf\u30fc\u3067\u5b9f\u969b\u306b\u898b\u3066\u3001\u5727\u7e2e\u306e\u5f71\u97ff\u3092\u611f\u3058\u308b\u90e8\u5206\uff08\u4f8b\u3048\u3070\u30d6\u30ed\u30c3\u30af\u30ce\u30a4\u30ba\u3084\u307c\u3084\u3051\u5177\u5408\uff09\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/p>\n
\u30e6\u30fc\u30b6\u30fc\u30c6\u30b9\u30c8 \u8907\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u753b\u50cf\u3092\u898b\u3066\u3082\u3089\u3044\u3001\u8a55\u4fa1\u3057\u3066\u3082\u3089\u3046\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n
\u5e73\u5747\u8a55\u4fa1\u3092\u7b97\u51fa\u3057\u3066\u3001\u54c1\u8cea\u3092\u6570\u5024\u5316\u3057\u307e\u3059\u3002<\/p>\n
\u5ba2\u89b3\u7684\u8a55\u4fa1<\/p>\n
PSNR\uff08\u30d4\u30fc\u30af\u4fe1\u53f7\u5bfe\u96d1\u97f3\u6bd4\uff09 \u5143\u306e\u753b\u50cf\u3068\u5727\u7e2e\u5f8c\u306e\u753b\u50cf\u3068\u306e\u9055\u3044\u3092\u6570\u5024\u5316\u3057\u307e\u3059\u3002<\/p>\n
PSNR\u304c\u9ad8\u3044\u307b\u3069\u3001\u54c1\u8cea\u304c\u826f\u3044\u3068\u3055\u308c\u307e\u3059\u304c\u3001\u4eba\u9593\u306e\u8996\u899a\u3068\u306e\u76f8\u95a2\u306f\u5fc5\u305a\u3057\u3082\u9ad8\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
SSIM\uff08\u69cb\u9020\u985e\u4f3c\u5ea6\uff09 PSNR\u306b\u6bd4\u3079\u3066\u3001\u4eba\u9593\u306e\u8996\u899a\u7279\u6027\u3092\u8003\u616e\u3057\u305f\u6307\u6a19\u3067\u3059\u3002<\/p>\n
\u69cb\u9020\u3084\u8f1d\u5ea6\u3001\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u306e\u985e\u4f3c\u6027\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/p>\n
1\u306b\u8fd1\u3044\u307b\u3069\u5143\u306e\u753b\u50cf\u306b\u8fd1\u3044\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n
2. \u5727\u7e2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e<\/p>\n
\u5727\u7e2e\u306e\u7a2e\u985e<\/p>\n
\u975e\u53ef\u9006\u5727\u7e2e\uff08\u4f8b\u3000JPEG, WebP\uff09 \u30c7\u30fc\u30bf\u3092\u6e1b\u3089\u3059\u4ee3\u308f\u308a\u306b\u591a\u5c11\u306e\u54c1\u8cea\u4f4e\u4e0b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u591a\u304f\u306e\u5834\u5408\u3001Web\u3084\u30e2\u30d0\u30a4\u30eb\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u53ef\u9006\u5727\u7e2e\uff08\u4f8b\u3000PNG\uff09 \u5727\u7e2e\u3057\u3066\u3082\u5143\u306e\u753b\u50cf\u60c5\u5831\u3092\u5931\u308f\u306a\u3044\u305f\u3081\u3001\u9ad8\u54c1\u8cea\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u9762\u3067\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n
\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u7279\u6027<\/p>\n
JPEG\u306f\u5199\u771f\u306b\u9069\u3057\u3066\u304a\u308a\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3068\u54c1\u8cea\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8abf\u7bc0\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
PNG\u306f\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u3084\u900f\u660e\u5ea6\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n
WebP\u306fJPEG\u3084PNG\u306b\u6bd4\u3079\u3066\u3001\u3088\u308a\u9ad8\u3044\u5727\u7e2e\u6bd4\u3068\u54c1\u8cea\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n
3. \u5727\u7e2e\u306e\u6700\u9069\u5316<\/p>\n
\u30bf\u30fc\u30b2\u30c3\u30c8\u30c7\u30d0\u30a4\u30b9\u3068\u7528\u9014\u306e\u8003\u616e \u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u3069\u306e\u3088\u3046\u306b\u4f7f\u7528\u3055\u308c\u308b\u304b\uff08\u4f8b\u3000Web\u30b5\u30a4\u30c8\u3001\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u306a\u3069\uff09\u3092\u8003\u616e\u3057\u3066\u5727\u7e2e\u65b9\u6cd5\u3092\u9078\u3073\u307e\u3059\u3002<\/p>\n
\u753b\u8cea\u4f4e\u4e0b\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b \u4e0a\u8a18\u306e\u8a55\u4fa1\u65b9\u6cd5\u3092\u4f7f\u3044\u3001\u8a31\u5bb9\u7bc4\u56f2\u306e\u753b\u8cea\u3092\u7dad\u6301\u3059\u308b\u5727\u7e2e\u7387\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u306e\u4f7f\u7528 \u4f8b\u3048\u3070\u3001ImageMagick\u3084TinyPNG\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u3044\u3001\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u52b9\u7387\u7684\u306b\u5727\u7e2e\u3068\u6700\u9069\u5316\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
\u9818\u57df\u5225\u5727\u7e2e \u753b\u50cf\u306e\u91cd\u8981\u306a\u90e8\u5206\u3068\u305d\u3046\u3067\u306a\u3044\u90e8\u5206\u306b\u5fdc\u3058\u3066\u3001\u5727\u7e2e\u7387\u3092\u5909\u3048\u308b\u624b\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
4. \u6839\u62e0\u3068\u306a\u308b\u7406\u8ad6\u3068\u6280\u8853<\/p>\n
\u4eba\u9593\u8996\u899a\u30b7\u30b9\u30c6\u30e0\uff08HVS\uff09 \u5727\u7e2e\u306e\u6839\u62e0\u306f\u4eba\u9593\u306e\u8996\u899a\u7279\u6027\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u6210\u5206\u3084\u8272\u306e\u9055\u3044\u306b\u5bfe\u3057\u3066\u654f\u611f\u306a\u305f\u3081\u3001\u4e0d\u8981\u306a\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u969b\u306bHVS\u30e2\u30c7\u30eb\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u60c5\u5831\u7406\u8ad6 \u30b7\u30e3\u30ce\u30f3\u306e\u60c5\u5831\u7406\u8ad6\u304c\u5727\u7e2e\u6280\u8853\u306e\u57fa\u790e\u3067\u3059\u3002<\/p>\n
\u60c5\u5831\u91cf\u3068\u30ce\u30a4\u30ba\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308a\u306a\u304c\u3089\u6b63\u78ba\u306a\u5fa9\u5143\u304c\u53ef\u80fd\u306a\u65b9\u6cd5\u304c\u8003\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0a\u306e\u65b9\u6cd5\u3068\u7406\u8ad6\u306b\u3088\u308a\u3001\u5727\u7e2e\u5f8c\u306e\u753b\u50cf\u54c1\u8cea\u3092\u9069\u5207\u306b\u8a55\u4fa1\u3057\u3001\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u753b\u50cf\u3092\u52b9\u679c\u7684\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u624b\u6cd5\u3092\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u7d44\u307f\u5408\u308f\u305b\u3066\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n
\u3010\u8981\u7d04\u3011
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