Fig. 1. Experiment of intensity and distance

Fig. 2. Intensity versus distance acquired

Fig. 3. Experiment of intensity and incidence angle

Fig. 4. Intensity versus incidence angle for different distances acquired

Fig. 5. Corrected intensity versus incidence angle acquired

Fig. 6. Intensity correcting results. (a) Original intensity image; (b) corrected intensity image

Fig. 7. Intensity classifying results. (a) Intensity image; (b) classification image

Fig. 8. Color classifying results. (a) Color image; (b) classification image

Fig. 9. Intensity and color classifying results. (a) Pseudo color image; (b) classification image