docs: private float harrisMeasure(int x, int y, float k) {
  
  		float m00 = this.Lx2[x][y];
  		float m01 = this.Lxy[x][y];
  		float m10 = this.Lxy[x][y];
  		float m11 = this.Ly2[x][y];
  
  		return m00 * m11 - m01 * m10 - k * (m00 + m11) * (m00 + m11);
  	}