小编Mir*_*rlo的帖子

我的代码运行良好,但是当它提取关键点时,它与两个图像匹配得很差.在这里你可以找到我的代码,但我不知道如何绘制好的匹配JAVA Android

 descriptors = new Mat();
        keypoints = new MatOfKeyPoint();
        detector = FeatureDetector.create(FeatureDetector.ORB);
        detector.detect(img1, keypoints);
        descriptor = DescriptorExtractor.create(DescriptorExtractor.ORB);
        descriptor.compute(img1, keypoints, descriptors);
        matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);
     ColorDetection.cvt_YUVtoRGBtoHSV(mYuv,mGraySubmat);
          MatOfKeyPoint mKeyPoints = new MatOfKeyPoint();
        MatOfDMatch  matches = new MatOfDMatch();

          detector.detect(mGraySubmat, mKeyPoints);
          descriptor.compute(mGraySubmat, mKeyPoints, mIntermediateMat);

        matcher.match(mIntermediateMat,descriptors,matches);
        mIntermediateMat2.create(resultSize, CvType.CV_8UC1);
        Features2d.drawMatches(img1, keypoints, mGraySubmat, mKeyPoints, matches, 
                mIntermediateMat2,GREEN, RED,  MATCH_MASK, Features2d.NOT_DRAW_SINGLE_POINTS);

          Imgproc.resize(mIntermediateMat2, mIntermediateMat2, mRgba.size());
          Imgproc.cvtColor(mIntermediateMat2, mRgba, Imgproc.COLOR_RGBA2BGRA, 4);
     Utils.matToBitmap(mRgba, bmp);

      DMatch dm[] = matches.toArray();
          List<Point> lp1 = new ArrayList<Point>(dm.length);
          List<Point> lp2 = new ArrayList<Point>(dm.length);
          KeyPoint tkp[] = keypoints.toArray(); …

我有一个很大的 json 文件，大小约为 40Gb。当我尝试将此对象数组文件转换为 java 对象列表时，它崩溃了。我已经使用了最大堆的所有大小xmx，但没有任何效果！

public Set<Interlocutor> readJsonInterlocutorsToPersist() {
    String userHome = System.getProperty(USER_HOME);
    log.debug("Read file interlocutors "+userHome);
    try {
        ObjectMapper mapper = new ObjectMapper();
        // JSON file to Java object
        Set<Interlocutor> interlocutorDeEntities = mapper.readValue(
                new File(userHome + INTERLOCUTORS_TO_PERSIST),
                new TypeReference<Set<Interlocutor>>() {
                });
        return interlocutorDeEntities;
    } catch (Exception e) {
        log.error("Exception while Reading InterlocutorsToPersist file.",
                e.getMessage());
        return null;
    }
} 

有没有办法使用读取此文件BufferedReader，然后逐个对象推送？

我已将我的操作系统从12.04更新到ubuntu 14.04,当我尝试重新加载我的Symfony2项目时,我收到此错误:

You don't have permission to access /app_dev.php/ on this server.

这是我的apache2文件:

<VirtualHost *:80>
    ServerName  s**a
    ServerAlias  d**n

    # Indexes + Directory Root.
    DirectoryIndex index.html index.php

    DocumentRoot /home/****/


    <Directory />
                Options -Indexes +FollowSymLinks
        Require all granted
        </Directory>

        <DirectoryMatch .*\.svn/.*>
            Deny From All
        </DirectoryMatch>

    # Logfiles

</VirtualHost>

PS : it works well before the update !