Summary
This chapter has shown several different types of image-processing filters that can be used to generate various cartoon effects: a plain sketch mode that looks like a pencil drawing, a paint mode that looks like a color painting, and a cartoon mode that overlays the sketch mode on top of the paint mode to make the image appear like a cartoon. It also shows that other fun effects can be obtained, such as the evil mode that greatly enhances noisy edges, and the alien mode that changes the skin of the face to appear bright green.
There are many commercial smartphone apps that perform similar fun effects on the user's face, such as cartoon filters and skin-color changers. There are also professional tools using similar concepts, such as skin-smoothing ...
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