コード例 #1
0
ファイル: FacePreview.java プロジェクト: rarago/javacv
  private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
    final double ASPECT_TOLERANCE = 0.05;
    double targetRatio = (double) w / h;
    if (sizes == null) return null;

    Size optimalSize = null;
    double minDiff = Double.MAX_VALUE;

    int targetHeight = h;

    // Try to find an size match aspect ratio and size
    for (Size size : sizes) {
      double ratio = (double) size.width / size.height;
      if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
      if (Math.abs(size.height - targetHeight) < minDiff) {
        optimalSize = size;
        minDiff = Math.abs(size.height - targetHeight);
      }
    }

    // Cannot find the one match the aspect ratio, ignore the requirement
    if (optimalSize == null) {
      minDiff = Double.MAX_VALUE;
      for (Size size : sizes) {
        if (Math.abs(size.height - targetHeight) < minDiff) {
          optimalSize = size;
          minDiff = Math.abs(size.height - targetHeight);
        }
      }
    }
    return optimalSize;
  }
コード例 #2
0
  public static void main(String[] args) {
    Mat pFrame = imread("image0.png", CV_LOAD_IMAGE_GRAYSCALE);
    Mat cFrame = imread("image1.png", CV_LOAD_IMAGE_GRAYSCALE);
    Mat pGray = new Mat();
    Mat cGray = new Mat();

    pFrame.convertTo(pGray, CV_32FC1);
    cFrame.convertTo(cGray, CV_32FC1);
    Mat Optical_Flow = new Mat();

    DenseOpticalFlow tvl1 = createOptFlow_DualTVL1();
    tvl1.calc(pGray, cGray, Optical_Flow);

    Mat OF = new Mat(pGray.rows(), pGray.cols(), CV_32FC1);
    FloatBuffer in = Optical_Flow.getFloatBuffer();
    FloatBuffer out = OF.getFloatBuffer();

    int height = pGray.rows();
    int width = pGray.cols();

    for (int y = 0; y < height; y++) {
      for (int x = 0; x < width; x++) {
        float xVelocity = in.get();
        float yVelocity = in.get();
        float pixelVelocity = (float) Math.sqrt(xVelocity * xVelocity + yVelocity * yVelocity);
        out.put(pixelVelocity);
      }
    }
    imwrite("OF.png", OF);
  }