Abstract: An effective method for non-photorealistic rendering for computer generated images with
cartoon artistic works from 2D images is provided in this paper. The proposed methods is inspired by
bilateral filter and DOG filter. The color space of source image is transferred from RGB to LAB, and
bilateral filter can be used to reduce contrast in low contrast regions, and increase contrast in high
contrast regions. Further, the color can be abstracted by soft color quantization to create cartoon-like
effects. In addition, DOG filter and threshold are applied to obtain continuous and clear edge image, and
this edge information can be merged to the cartoon-like effects finally. Experimental results show that
our proposed method is simple and effective.

Key words: non-photorealistic rendering, cartoon, bilateral filter, quantization, DOG filter