{"id":6159,"date":"2026-02-17T11:24:11","date_gmt":"2026-02-17T02:24:11","guid":{"rendered":"https:\/\/matlantis.com\/ja\/?post_type=pfnblog&p=6159"},"modified":"2026-02-17T11:25:18","modified_gmt":"2026-02-17T02:25:18","slug":"pfp-descriptors-shapley-explainability","status":"publish","type":"pfnblog","link":"https:\/\/matlantis.com\/ja\/resources\/blog\/pfp-descriptors-shapley-explainability\/","title":{"rendered":"\u3010\u89e3\u8aac\u3011AI\u306f\u306a\u305c\u305d\u3046\u4e88\u6e2c\u3057\u305f\u306e\u304b\uff1f PFP descriptors\u3068Shapley\u5024\u3067\u89e3\u304d\u660e\u304b\u3059\u539f\u5b50\u30ec\u30d9\u30eb\u306e\u89e3\u91c8\u6027"},"content":{"rendered":"\n

\u5fdc\u7528\u7269\u7406\u5b66\u4f1a\u6625\u5b63\u5b66\u8853\u8b1b\u6f14\u4f1a\u306eWeb\u4e88\u7a3f\u96c6\u304c\u516c\u958b\u3055\u308c\u3001\u3044\u3088\u3044\u3088\u5b66\u4f1a\u30b7\u30fc\u30ba\u30f3\u306e\u5230\u6765\u3092\u611f\u3058\u307e\u3059\u306d\u3002\u4e88\u7a3f\u96c6\u306e\u63d0\u51fa\u3092\u7d42\u3048\u3066\u767a\u8868\u6e96\u5099\u306b\u8ffd\u308f\u308c\u3066\u3044\u308b\u65b9\u3084\u3001\u516c\u958b\u3055\u308c\u305f\u4e88\u7a3f\u3092\u898b\u3066\u8074\u8b1b\u8a08\u753b\u3092\u7acb\u3066\u3066\u3044\u308b\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n

\u79c1\u306f\u6628\u5e74\u306e\u7b2c86\u56de\u5fdc\u7528\u7269\u7406\u5b66\u4f1a\u79cb\u5b63\u5b66\u8853\u8b1b\u6f14\u4f1a\u306b\u3066\u3001\u300cPFP descriptors\u3068Shapley\u5024\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u539f\u5b50\u30ec\u30d9\u30eb\u3067\u306e\u4e88\u6e2c\u306e\u89e3\u91c8<\/a>\u300d\u3068\u3044\u3046\u30c6\u30fc\u30de\u3067\u767a\u8868\u3092\u884c\u3044\u307e\u3057\u305f\u3002 \u3042\u308a\u304c\u305f\u3044\u3053\u3068\u306b\u5f53\u65e5\u306f\u591a\u304f\u306e\u65b9\u306b\u3054\u8074\u8b1b\u3044\u305f\u3060\u304d\u3001\u5927\u5909\u306a\u3054\u597d\u8a55\u3092\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002\u30de\u30c6\u30ea\u30a2\u30eb\u30ba\u30a4\u30f3\u30d5\u30a9\u30de\u30c6\u30a3\u30af\u30b9\uff08MI\uff09\u5206\u91ce\u306b\u304a\u3044\u3066\u3001\u300cAI\u304c\u306a\u305c\u305d\u3046\u4e88\u6e2c\u3057\u305f\u306e\u304b\u300d\u3068\u3044\u3046\u300c\u89e3\u91c8\u6027\uff08Explainability\uff09\u300d\u3078\u306e\u9700\u8981\u304c\u3044\u304b\u306b\u9ad8\u3044\u304b\u3092\u3001\u808c\u3067\u611f\u3058\u308b\u6a5f\u4f1a\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u305d\u3053\u3067\u4eca\u56de\u306f\u3001\u5b66\u4f1a\u30b7\u30fc\u30ba\u30f3\u306e\u5230\u6765\u306b\u5408\u308f\u305b\u3066\u3001\u5f53\u6642\u306e\u767a\u8868\u5185\u5bb9\u3092\u30d9\u30fc\u30b9\u306b\u8a18\u4e8b\u3092\u57f7\u7b46\u3057\u307e\u3057\u305f\u3002\u5b66\u4f1a\u306e\u77ed\u3044\u6642\u9593\u3067\u306f\u4f1d\u3048\u304d\u308c\u306a\u304b\u3063\u305f\u8a73\u7d30\u306a\u80cc\u666f\u3084\u524d\u63d0\u77e5\u8b58\u3082\u542b\u3081\u3001\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

1. PFP descriptors\u3068\u306f<\/strong><\/h2>\n\n\n\n

\u307e\u305a\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u8a18\u8ff0\u5b50\u3068\u3057\u3066\u7528\u3044\u308bPFP descriptors\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002PFP descriptors\u306f\u6c4e\u7528\u6a5f\u68b0\u5b66\u7fd2\u30dd\u30c6\u30f3\u30b7\u30e3\u30ebPFP\u306e\u6700\u7d42\u5c64\u306e\u60c5\u5831\u3092\u51fa\u529b\u3059\u308b\u6a5f\u80fd\u3067\u3059[1]\u3002\u5404\u539f\u5b50<\/strong>\u306b\u5bfe\u3057\u3001\u305d\u306e\u5468\u8fba\u74b0\u5883\u3092\u8868\u73fe\u3059\u308b256\u6b21\u5143\u306e\u30d9\u30af\u30c8\u30eb\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u304a\u308a\u307e\u3059\u3002\u3053\u308c\u3089256\u500b\u306e\u6570\u5024\u306e\u4e00\u3064\u3072\u3068\u3064\u306b\u76f4\u611f\u7684\u306a\u7269\u7406\u7684\u610f\u5473\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001PFP\u306e\u8a08\u7b97\u7cbe\u5ea6\u3092\u652f\u3048\u308b\u9ad8\u5ea6\u306a\u60c5\u5831\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002\u3053\u306e\u60c5\u5831\u3092\u8ee2\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6750\u6599\u306e\u7269\u6027\u3092\u9ad8\u7cbe\u5ea6\u3067\u4e88\u6e2c\u3067\u304d\u308b\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059[2, 3]\u3002<\/p>\n\n\n\n

\"Figure<\/figure>\n\n\n\n
Figure 1. PFP descriptors<\/h5>\n\n\n\n

<\/p>\n\n\n\n

2. Shapley\u5024\u3068\u306f<\/strong><\/h2>\n\n\n\n

\u6b21\u306b\u3001\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u3092\u89e3\u91c8\u3059\u308b\u969b\u306e\u6838\u5fc3\u3068\u306a\u308bShapley\u5024\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002Shapley\u5024\u306f\u3001\u30b2\u30fc\u30e0\u7406\u8ad6\u3067\u7528\u3044\u3089\u308c\u308b\u8003\u3048\u65b9\u3067\u3001\u30c1\u30fc\u30e0\u5168\u4f53\u3067\u5f97\u3089\u308c\u305f\u5229\u5f97\u3092\u3001\u5404\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u8ca2\u732e\u5ea6\u306b\u5fdc\u3058\u3066\u5206\u914d\u3059\u308b\u305f\u3081\u306e\u8a08\u7b97\u65b9\u6cd5\u3067\u3059\u3002 \u4e2d\u5fc3\u7684\u306a\u30a2\u30a4\u30c7\u30a2\u306f\u3001\u201d\u3082\u3057\u305d\u306e\u4eba\u304c\u30c1\u30fc\u30e0\u306b\u53c2\u52a0\u3057\u305f\u3089\u3001\u5168\u4f53\u306e\u5229\u76ca\u306f\u3069\u308c\u304f\u3089\u3044\u5897\u3048\u305f\u304b\uff1f\u201d\u3092\u3001\u3042\u3089\u3086\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u8003\u3048\u3001\u305d\u306e\u5e73\u5747\u5024\u3092\u305d\u306e\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u8ca2\u732e\u5ea6\uff08\u53d6\u308a\u5206\uff09\u3068\u3059\u308b\u3001\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n

2-1. \u5177\u4f53\u4f8b<\/strong><\/h3>\n\n\n\n

\u6b21\u306e\u5177\u4f53\u4f8b\u3092\u898b\u306a\u304c\u3089\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002 A\u3001B\u3001C\u306e3\u4eba\u306e\u30d7\u30ec\u30a4\u30e4\u30fc\u304c\u304a\u308a\u3001\u53c2\u52a0\u3059\u308b\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u3063\u3066\u5f97\u3089\u308c\u308b\u5229\u5f97\u304c Table 1 \u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u30013\u4eba\u5168\u54e1\u304c\u53c2\u52a0\u3057\u3066\u5f97\u3089\u308c\u305f\u5229\u5f97\u3092\u3001\u5404\u30e1\u30f3\u30d0\u30fc\u306b\u3069\u306e\u3088\u3046\u306b\u5206\u914d\u3059\u308c\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n

Table 1. \u30d7\u30ec\u30a4\u30e4\u30fc\u3068\u5229\u5f97\u306e\u95a2\u4fc2<\/h5>\n\n\n\n
\u53c2\u52a0\u30d7\u30ec\u30a4\u30e4\u30fc<\/strong><\/td>\u5229\u5f97<\/strong><\/td><\/tr>
\u8ab0\u3082\u53c2\u52a0\u3057\u306a\u3044<\/td>0<\/td><\/tr>
A<\/td>1<\/td><\/tr>
B<\/td>2<\/td><\/tr>
C<\/td>3<\/td><\/tr>
A, B<\/td>6<\/td><\/tr>
A, C<\/td>7<\/td><\/tr>
B, C<\/td>8<\/td><\/tr>
A, B, C<\/td>15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u3053\u3053\u3067\u3001\u3042\u308b\u30e1\u30f3\u30d0\u30fc\u306e\u8ca2\u732e\u5ea6\u3092\u201d\u305d\u306e\u30d7\u30ec\u30a4\u30e4\u30fc\u304c\u30c1\u30fc\u30e0\u306b\u52a0\u308f\u3063\u305f\u3053\u3068\u3067\u3001\u5229\u5f97\u304c\u3069\u308c\u3060\u3051\u5897\u3048\u305f\u304b\u201d\u3092\u57fa\u6e96\u306b\u8003\u3048\u307e\u3059\u3002<\/p>\n\n\n\n

\u3057\u304b\u3057\u3001\u5897\u3048\u308b\u5229\u5f97\u306e\u91cf\u306f\u201d\u65e2\u306b\u8ab0\u304c\u30c1\u30fc\u30e0\u306b\u5165\u3063\u3066\u3044\u308b\u304b\u201d\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

    \n
  • \u8ab0\u3082\u3044\u306a\u3044\uff08\u5229\u5f97: 0\uff09\u3068\u3053\u308d\u306bA\u304c\u53c2\u52a0\u3057\u305f\u5834\u5408\uff08\u5229\u5f97: 1\uff09\uff1aA\u306e\u8ca2\u732e\u5ea6\u306f 1<\/li>\n\n\n\n
  • \u65e2\u306bB\u304c\u3044\u308b\uff08\u5229\u5f97: 2\uff09\u3068\u3053\u308d\u306bA\u304c\u53c2\u52a0\u3057\u305f\u5834\u5408\uff08\u5229\u5f97: 6\uff09\uff1aA\u306e\u8ca2\u732e\u5ea6\u306f 4 <\/li>\n<\/ul>\n\n\n\n

    \u3053\u306e\u3088\u3046\u306b\u3001\u65e2\u306b\u5165\u3063\u3066\u3044\u308b\u30e1\u30f3\u30d0\u30fc\u306b\u3088\u3063\u3066\u3001\u5897\u3048\u308b\u5229\u5f97\u306e\u91cf\u306f\u5909\u308f\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u65e2\u306b\u5165\u3063\u3066\u3044\u308b\u30e1\u30f3\u30d0\u30fc\u306e\u5168\u30d1\u30bf\u30fc\u30f3\u3092\u8003\u3048\u3001\u5e73\u5747\u3059\u308b\u3053\u3068\u3067\u5404\u30e1\u30f3\u30d0\u30fc\u306e\u8ca2\u732e\u5ea6\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

    \u5177\u4f53\u7684\u306a\u8a08\u7b97\u306fTable2\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001A\u2192B\u2192C\u3068\u53c2\u52a0\u3057\u305f\u5834\u5408\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

      \n
    • \u8ab0\u3082\u3044\u306a\u3044\uff08\u5229\u5f97: 0\uff09\u3068\u3053\u308d\u306bA\u304c\u53c2\u52a0\u3057\u305f\u5834\u5408\uff08\u5229\u5f97: 1\uff09\uff1aA\u306e\u8ca2\u732e\u5ea6\u306f1<\/li>\n\n\n\n
    • \u65e2\u306bA\u304c\u3044\u308b\uff08\u5229\u5f97: 1\uff09\u3068\u3053\u308d\u306bB\u304c\u53c2\u52a0\u3057\u305f\u5834\u5408\uff08\u5229\u5f97: 6\uff09\uff1aB\u306e\u8ca2\u732e\u5ea6\u306f5<\/li>\n\n\n\n
    • \u65e2\u306bA,B\u304c\u3044\u308b\uff08\u5229\u5f97: 6\uff09\u3068\u3053\u308d\u306bC\u304c\u53c2\u52a0\u3057\u305f\u5834\u5408\uff08\u5229\u5f97: 15\uff09\uff1aC\u306e\u8ca2\u732e\u5ea6\u306f9 <\/li>\n<\/ul>\n\n\n\n

      \u3053\u306e\u3088\u3046\u306b\u5168\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u8a08\u7b97\u3057\u3001\u305d\u308c\u3089\u3092\u5e73\u5747\u3057\u305f\u7d50\u679c\u304c\u3001\u5404\u30e1\u30f3\u30d0\u30fc\u306eShapley\u5024(Table2\u306e\u6700\u4e0b\u884c)\u3067\u3059\u3002\u8a08\u7b97\u7d50\u679c\u304b\u3089\u3082\u308f\u304b\u308b\u3088\u3046\u306b\u3001Shapley\u5024\u306b\u306f\u201d\u5404\u30e1\u30f3\u30d0\u30fc\u306e\u8ca2\u732e\u5ea6\u306e\u5408\u8a08\u304c\u3001\u5168\u30e1\u30f3\u30d0\u30fc\u53c2\u52a0\u6642\u306e\u7dcf\u5229\u5f97\u3068\u4e00\u81f4\u3059\u308b\u201d\u3068\u3044\u3046\u3001\u5206\u914d\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u90fd\u5408\u306e\u826f\u3044\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

      Table 2. \u5404\u30d7\u30ec\u30a4\u30e4\u30fc\u306e\u8ca2\u732e\u5ea6<\/h5>\n\n\n\n
      \u53c2\u52a0\u9806<\/strong><\/td>A\u306e\u8ca2\u732e\u5ea6<\/strong><\/td>B\u306e\u8ca2\u732e\u5ea6<\/strong><\/td>C\u306e\u8ca2\u732e\u5ea6<\/strong><\/td><\/tr>
      A \u2192 B \u2192 C<\/td>1<\/td>5<\/td>9<\/td><\/tr>
      A \u2192 C \u2192 B<\/td>1<\/td>8<\/td>6<\/td><\/tr>
      B \u2192 A \u2192 C<\/td>4<\/td>2<\/td>9<\/td><\/tr>
      B \u2192 C \u2192 A<\/td>7<\/td>2<\/td>6<\/td><\/tr>
      C \u2192 A \u2192 B<\/td>4<\/td>8<\/td>3<\/td><\/tr>
      C \u2192 B \u2192 A<\/td>7<\/td>5<\/td>3<\/td><\/tr>
      \u5e73\u5747<\/td>4<\/td>5<\/td>6<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      2-2. <\/strong>\u4e00\u822c\u5316\u3068\u8fd1\u4f3c\u624b\u6cd5<\/strong><\/h3>\n\n\n\n

      \u4e0a\u8a18\u64cd\u4f5c\u3092\u4e00\u822c\u5316\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

      \\[\\phi_i\\ =\\ \\sum_{S\\ \\subseteq\\ N\\ \\setminus\\ \\{i\\}}\\ \\frac{|S|!\\ (|N|\\ -\\ |S|\\ -\\ 1)!}{|N|!}\\ (v(S\\ \\cup\\ \\{i\\})\\ -\\ v(S))\\]