text: #ifndef threshold_H
  #define threshold_H
  #include "opencv2/core/core.hpp"
  
  namespace vision_commons
  {
  class Threshold
  {
  public:
    static cv::Mat threshold(cv::Mat& raw, int low_a, int high_a, int low_b, int high_b, int low_c, int high_c);
  };
  } // namespace vision_commons
  
  #endif
  