Comic exaggeration method, device and system for human face digital image supporting position deflection

Abstract

The embodiment of the invention provides a comic exaggeration method, device and system for a human face digital image supporting posture deflection. The method comprises the following steps of: restoring the approximate depth information of a two-dimensional characteristic point of an input human face image according to a pre-established three-dimensional average face shape model; generating the three-dimensional shape of the input human face image according to the approximate depth information; performing three-dimensional exaggeration on the three-dimensional shape which is rotated to a front view according to a three-dimensional exaggeration rule in a pre-established nonnegative matrix decomposition based human face three-dimensional shape characteristic space to obtain a three-dimensional shape subjected to three-dimensional exaggeration; converting the three-dimensional shape subjected to three-dimensional exaggeration into the initial posture of the input human face image and projecting to generate a two-dimensional characteristic point subjected to three-dimensional exaggeration; and generating a human face image with a comic exaggeration effect according to the two-dimensional characteristic point subjected to three-dimensional exaggeration. By adopting the method, a vivid, humorous and variable comic exaggeration effect can be achieved on the human face image which is deflected by + / -40 degrees in a swinging way and deflected by + / -20 degrees in a pitching way.

Description

technical field [0001] The invention relates to the field of computer graphics and image processing, in particular to a method, device and system for caricature exaggeration of human face digital images supporting posture deflection. Background technique [0002] Face cartoons use simple outlines and simple colors to highlight the characteristics of the characters, and exaggerate or realistically express the characters' personalities and reflect the artist's creative ideas through artistic techniques. Non-Photorealistic Rendering (NPR, Non-Photorealistic Rendering) cartoon avatar can remove unimportant details and highlight important features, so as to better convey information. It has a strong role in many fields such as network communication and online games. Application prospect. [0003] In terms of artistic exaggeration, through face-based feature statistics and feature discovery, that is, to measure facial organ features (such as forehead width, lip thickness, etc.) t...

AI Technical Summary

Problems solved by technology

[0008] In the process of realizing the present invention, the inventors found that the prior art has at least the following deficiencies: the existing method of face image caricature exaggeration can only be limited to front-view images or images with fixed postures; the prior art uses the depth information of feature points After recovery, rotate the deflected 3D feature points of the face to the front view and then apply the exaggeration rule, but the exaggeration rule applied is two-dimensional and does not make good use of depth information; and the existing technology uses two-dimensional based on intuitive semantics Dimensional exaggeration rule, the exaggeration effect produced by this exaggeration rule is limited and lacks vividness

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