Fig. 1. Schematic of structural group establishment

Fig. 2. Gabor characteristic maps obtained under 5 scales and 8 directions

Fig. 3. Comparison among mural inpainting results with random pixel missing. (a) Original image; (b) mural images with random pixel missing; (c) CDD algorithm; (d) algorithm in Ref.[11]; (e) algorithm in Ref.[12]; (f) proposed algorithm

Fig. 4. Comparison among mural inpainting results with artificial scratch. (a) Original image; (b) image with artificial scratch ; (c) CDD algorithm; (d) Criminisi algorithm; (e) algorithm in Ref.[7]; (f) algorithm in Ref.[11]; (g) algorithm in Ref.[12]; (h) proposed algorithm; (i) local enlargement of repaired area using CDD algorithm; (j) local enlargement of repaired area using Criminisi algorithm; (k) local enlargement of repaired area using algorithm in Ref.[7]; (l) local enlargement of repaired ar

Fig. 5. Comparison of mural inpainting results with real damage. (a) Original image; (b) mask image; (c) CDD algorithm; (d) Criminisi algorithm; (e) algorithm in Ref.[7]; (f) algorithm in Ref.[11]; (g) algorithm in Ref.[12]; (h) proposed algorithm

Fig. 6. Comparison of mural inpainting results with real damage. (a) Original image; (b) mask image; (c) CDD algorithm; (d) Criminisi algorithm; (e) algorithm in Ref.[7]; (f) algorithm in Ref.[11]; (g) algorithm in Ref.[12]; (h) proposed algorithm

Table 1. Comparison among mural inpainting results with random pixel missing

Table 2. Comparison among mural inpainting results with artificial scratch