caffe RandomOrderChannels

就是将rgb图的3个channel随机打乱顺序,给定一个概率值是否执行这个操作,v系列模型的概率一般都设置的为0

void RandomOrderChannels(const cv::Mat& in_img, cv::Mat* out_img,
                         const float random_order_prob) {
  float prob;
  caffe_rng_uniform(1, 0.f, 1.f, &prob);
  if (prob < random_order_prob) {
    // Split the image to 3 channels.
    vector<cv::Mat> channels;
    cv::split(*out_img, channels);
    CHECK_EQ(channels.size(), 3);

    // Shuffle the channels.
    std::random_shuffle(channels.begin(), channels.end());
    cv::merge(channels, *out_img);
  } else {
    *out_img = in_img;
  }
}