Fig. 1. Experimental devices. (a) Infrared imagimg system; (b) black body

Fig. 2. 3D displays of different homogeneous backgrounds. (a) 3D map with weakly homogeneous background; (b) 3D map with strongly homogeneous background

Fig. 3. Response rate distribution based on national standard method. (a) 3D distribution of response rate; (b) histogram of response rate

Fig. 4. Approximate fitting surfaces of different homogeneous backgrounds. (a) Approximate fitting surface with weakly homogeneous background; (b) approximate fitting surface with strongly homogeneous background

Fig. 5. Blind pixel map after removing overlap part in experimental environment 1. (a) National standard method; (b) proposed method

Fig. 6. Blind pixel map after removing overlap part in experimental environment 2. (a) National standard method; (b) proposed method