text: #ifndef __OPENCV_FEATURES_2D_KAZE_UTILS_H__
  #define __OPENCV_FEATURES_2D_KAZE_UTILS_H__
  
  /* ************************************************************************* */
  /**
   * @brief This function computes the value of a 2D Gaussian function
   * @param x X Position
   * @param y Y Position
   * @param sig Standard Deviation
   */
  inline float gaussian(float x, float y, float sigma) {
    return expf(-(x*x + y*y) / (2.0f*sigma*sigma));
  }
  
  /* ************************************************************************* */
  /**
   * @brief This function checks descriptor limits
   * @param x X Position
   * @param y Y Position
   * @param width Image width
   * @param height Image height
   */
  inline void checkDescriptorLimits(int &x, int &y, int width, int height) {
  
    if (x < 0) {
      x = 0;
    }
  
    if (y < 0) {
      y = 0;
    }
  
    if (x > width - 1) {
      x = width - 1;
    }
  
    if (y > height - 1) {
      y = height - 1;
    }
  }
  
  #endif
  