Ejemplo n.º 1
0
    private static void WriteNewCentroids(Context context) throws IOException {
      FileSystem fs = FileSystem.get(context.getConfiguration());
      Path nextCFile = new Path(context.getConfiguration().get("NEXTCFILE"));
      DataOutputStream d = new DataOutputStream(fs.create(nextCFile, false));
      BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(d));

      for (String centroid : newCentroids) {
        writer.write(centroid + "\n");
      }

      writer.close();
    }
Ejemplo n.º 2
0
  public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);

    Path matFile = new Path(args[0]);
    FSDataInputStream matData = fs.open(matFile);
    BufferedReader br = new BufferedReader(new InputStreamReader(matData));

    int i = 0;
    String line;
    while ((line = br.readLine()) != null) {
      StringTokenizer tokenizer = new StringTokenizer(line);
      String iRow = tokenizer.nextToken();
      String iCol = tokenizer.nextToken();
      if (Integer.parseInt(iRow) == Integer.parseInt(iCol)) {
        i++;
      }
    }
    br.close();
    int dimention = i;

    conf.setInt("DIMENTION", dimention);
    Path xFile = new Path("preX/Result");
    FSDataOutputStream xData = fs.create(xFile);
    BufferedWriter iniX = new BufferedWriter(new OutputStreamWriter(xData));
    for (int j = 0; j < dimention; j++) {
      iniX.write(String.valueOf(j) + " 0");
      iniX.newLine();
    }
    iniX.close();

    URI matVec = new URI(args[0]);
    DistributedCache.addCacheFile(matVec, conf);

    int iteration = 0;
    do {
      ToolRunner.run(conf, new Jacobi(), args);
    } while (iteration++ < max_iter && (!stopIteration(conf)));
  }
Ejemplo n.º 3
0
  public static void extractQueryFeatures2HDFS(String filename, Job job) throws IOException {

    // Read the local image.jpg as a Mat
    Mat query_mat_float =
        Highgui.imread(LOCAL_USER_DIR + ID + INPUT + "/" + filename, CvType.CV_32FC3);
    // Convert RGB to GRAY
    Mat query_gray = new Mat();
    Imgproc.cvtColor(query_mat_float, query_gray, Imgproc.COLOR_RGB2GRAY);
    // Convert the float type to unsigned integer(required by SIFT)
    Mat query_mat_byte = new Mat();
    query_gray.convertTo(query_mat_byte, CvType.CV_8UC3);
    //        // Resize the image to 1/FACTOR both width and height
    //        Mat query_mat_byte = FeatureExtraction.resize(query_mat_byte);

    // Extract the feature from the (Mat)image
    Mat query_features = FeatureExtraction.extractFeature(query_mat_byte);

    System.out.println(PREFIX + "Extracting the query image feature...");
    System.out.println("query_mat(float,color):" + query_mat_float);
    System.out.println("query_mat(float,gray):" + query_gray);
    System.out.println("query_mat(byte,gray):" + query_mat_byte);
    System.out.println("query_mat_features:" + query_features);
    System.out.println();

    // Store the feature to the hdfs in order to use it later in different map tasks
    System.out.println(PREFIX + "Generating the feature file for the query image in HDFS...");
    FileSystem fs = FileSystem.get(job.getConfiguration());
    String featureFileName = filename.substring(0, filename.lastIndexOf(".")) + ".json";
    FSDataOutputStream fsDataOutputStream =
        fs.create(new Path(HDFS_HOME + USER + ID + INPUT + "/" + featureFileName));
    BufferedWriter bw =
        new BufferedWriter(new OutputStreamWriter(fsDataOutputStream, StandardCharsets.UTF_8));
    bw.write(FeatureExtraction.mat2json(query_features));
    bw.close();
    System.out.println(PREFIX + "Query feature extraction finished...");
    System.out.println();
  }