@Override
  public void apply(Mat src, Mat dst) {
    Core.split(src, mChannels);

    final Mat r = mChannels.get(0);
    final Mat g = mChannels.get(1);
    final Mat b = mChannels.get(2);

    Core.min(b, r, b);
    Core.min(b, g, b);

    Core.merge(mChannels, dst);
  }