message: Adding comment from source code to documentation.
diff: @@ -598,6 +598,15 @@ CV__DNN_EXPERIMENTAL_NS_BEGIN
  static Ptr<RegionLayer> create(const LayerParams& params);
  };
  + /**
  + * @brief \f$ L_p \f$ - detection output layer.
  + *
  + * num() and channels() are 1.
  + * Since the number of bboxes to be kept is unknown before nms, we manually
  + * set it to maximal number of detections, [keep_top_k] parameter multiplied by batch size.
  + * Each row is a 7 dimension std::vector, which stores
  + * [image_id, label, confidence, xmin, ymin, xmax, ymax]
  + */
  class CV_EXPORTS DetectionOutputLayer : public Layer
  {
  public:
  