Figure 3

Edge overlaying algorithm. A low contrast image (a), (b) shows the extracted edges without applying any presmoothing filter edges and when smoothing using simple Gaussian (20 × 20 kernel size) and anisotropic diffusion filters in (c) and (d), respectively. (e-g) are the edge overlaid images when superimposed by edges extracted from the original image, simplified image by Gaussian and anisotropic diffusion filters, respectively. (h) is the overlaid on the cartoon image.