“…Thresholding [27,28,[32][33][34][35][36] Template matching [6,7,12,[24][25][26] Colour-based techniques [27][28][29][30][31] Camera or display filters [23,[37][38][39][40][41][42][43] Video and camera network [32,34,38,[44][45][46][47][48][49] Hardware-based approaches [30,50] Classical vision techniques in combination with fuzy rule-based systems [5,7,[9][10][11][12] presented in Table 1. Note that it is necessary to analyze the brightness of the image to correctly calculate the threshold value of the laser spot.…”