Fig. 1. CFAs in color imaging systems. (a) Bayer array; (b) SONY-RGBW filter array

Fig. 2. Flow chart of RIHR-CRM

Fig. 3. Flow chart of iterative residual interpolation. (a) Bidirectional guided filtering; (b) unidirectional guided filtering

Fig. 4. Images in Kodak data set

Fig. 5. 15 natural images in real scenes

Fig. 6. Image acquisition system. (a) System composition; (b) relative spectral sensitivity of each band

Fig. 7. Color reconstruction results for local patches with 100 pixel ×100 pixel patch size in the Kodak data set by different methods. (a1) (a2) Reference image; (b1) (b2) Standard; (c1) (c2) Pan+PCA; (d1) (d2) Pan+BT; (e1) (e2) Pan+IHS; (f1) (f2) Pan+GS; (g1) (g2) Pan+HCM; (h1) (h2) AP; (i1) (i2) Bilinear; (j1) (j2) RIHR-CRM

Fig. 8. Color reconstruction results for local patches with 100 pixel ×100 pixel patch size in real scenes by different methods. (a1) (a2) Reference image; (b1) (b2) Standard; (c1) (c2) Pan+PCA; (d1) (d2) Pan+BT; (e1) (e2) Pan+IHS; (f1) (f2) Pan+GS; (g1) (g2) Pan+HCM; (h1) (h2) AP; (i1) (i2) Bilinear; (j1) (j2) RIHR-CRM

Fig. 9. Color correction results for images in real scenes

Table 1. Average objective evaluation results of 24 images in the Kodak data set

Table 2. Average objective evaluation results of 15 natural images in real scenes