コード例 #1
0
 public ESASimilarity(ConceptMapper mapper, IndexHelper helper) {
   super(mapper, helper);
   this.esaHelper = helper;
   this.reader = helper.getReader();
   this.searcher = helper.getSearcher();
   searcher.setSimilarity(new LuceneSimilarity());
   this.setName("esa-similarity");
 }
コード例 #2
0
  public double singleSearch(int docNum)
      throws IOException, InstantiationException, IllegalAccessException {
    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(indexPath)));

    // -----------

    String query = reader.document(docNum).getValues("hash")[0];
    CEDD ceddQuery = new CEDD();
    ceddQuery.setByteArrayRepresentation(
        reader.document(docNum).getField(DocumentBuilder.FIELD_NAME_CEDD).binaryValue().bytes,
        reader.document(docNum).getField(DocumentBuilder.FIELD_NAME_CEDD).binaryValue().offset,
        reader.document(docNum).getField(DocumentBuilder.FIELD_NAME_CEDD).binaryValue().length);

    // -----------

    HashSet<String> gold = new HashSet<String>(numImagesEval);
    ImageSearcher cis = ImageSearcherFactory.createCEDDImageSearcher(100);
    ImageSearchHits hits = cis.search(reader.document(docNum), reader);
    for (int i = 0; i < 10; i++) {
      gold.add(hits.doc(i).getValues(DocumentBuilder.FIELD_NAME_IDENTIFIER)[0]);
    }

    // ------------

    IndexSearcher searcher = new IndexSearcher(reader);
    searcher.setSimilarity(
        new SimilarityBase() {
          @Override
          protected float score(BasicStats basicStats, float freq, float v2) {
            return 1;
          }

          @Override
          public String toString() {
            return null;
          }
        });
    TopDocs topDocs = searcher.search(createQuery(query), 500);
    topDocs = rerank(topDocs, ceddQuery, reader);
    //        System.out.println("topDocs.scoreDocs.length = " + topDocs.scoreDocs.length);
    double numMatches = 0;
    for (int i = 0; i < topDocs.scoreDocs.length; i++) {
      ScoreDoc scoreDoc = topDocs.scoreDocs[i];
      //            System.out.print(scoreDoc.score + ": ");
      String file =
          reader.document(scoreDoc.doc).getValues(DocumentBuilder.FIELD_NAME_IDENTIFIER)[0];
      //            System.out.println(file.substring(file.lastIndexOf('/') + 1) +
      // (gold.contains(file)?" x":" o"));
      if (gold.contains(file)) numMatches++;
    }
    return numMatches;
  }