Fig. 1. Distribution of sample parameters. (a) Color distribution of samples; (b) graininess distribution of samples

Fig. 2. Structure diagram. (a) Integrating sphere; (b) schematic diagram of visual experiment

Fig. 3. Visual experimental conditions. (a) Sample placement; (b) visual experiment

Fig. 4. Comparison of BYKMac and visual experiment results

Fig. 5. Device diagram. (a) Schematic diagram of measuring device; (b) physical map of measuring device

Fig. 6. Matching results of experimental device and spectral luminous efficiency

Fig. 7. Graininess pictures. (a) G=3; (b) G=6; (c) G=9

Fig. 8. Comparison of various algorithm values and visual values. (a) GLCM:ENT; (b) GLCM:ASM; (c) GLCM:HOM; (d) GLCM:COR; (e) GLDS:ENT; (f) GLDS:MEAN; (g) GLDS:CON; (h) GLDS:ASM; (i) FD

Fig. 9. Data comparison. (a) Comparison of variance calculation value with BYKMac values; (b) comparison of variance calculation values with visual experiment results

Fig. 10. Data comparison. (a) Comparison of graininess evaluation model and BYKMac results; (b) comparison of graininess evaluation model and visual experiment results