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Video-based 3D human face expression cartoon driving method

A technology of facial expressions and driving methods, applied in animation production, image data processing, instruments, etc., can solve the problem of manual operation required for initialization, and achieve facial animation driving effects, good tracking results, and robust facial features The effect of point positioning

Inactive Publication Date: 2012-01-18
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with feature-based and motion-based methods, model-based methods use prior knowledge, as long as the training set contains the required facial feature positioning information, good search results can be obtained, but this type of method initialization requires manual operation

Method used

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  • Video-based 3D human face expression cartoon driving method
  • Video-based 3D human face expression cartoon driving method
  • Video-based 3D human face expression cartoon driving method

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing:

[0041] like figure 1 As shown, the present invention mainly consists of four parts: image preprocessing; BP face detection; enhanced ASM face feature point positioning and tracking; data information conversion. In the image preprocessing module, the image quality is enhanced through light compensation, Gaussian smoothing and morphological operations of grayscale images; in the BP face detection module, the face in the video is detected by the neural network algorithm, and its position and size are returned, as The next step of facial feature point positioning provides a smaller search range to ensure real-time performance; in the video face feature point positioning and tracking module, the enhanced active shape model (ASM) algorithm and predictive meanshift algorithm are used to accurately extract faces Shape, eyes, eyebrows, mouth, nose and other feature point informatio...

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Abstract

The invention discloses a video-based 3D human face expression cartoon driving method, which comprises the following steps: (1) image preprocessing, namely improving the image quality through light compensation, Gaussian smoothing and morphology operation of a gray level image; (2) BP human face detection, namely detecting a human face in a video through a BP neural network algorithm, and returning the size of the position of the human face for providing a smaller search range for human face characteristic point positioning of the next step to ensure instantaneity; (3) ASM human face characteristic point positioning and tracking, namely precisely extracting characteristic point information of human face shape, eyes, eyebrows, mouth and nose through an enhanced active shape model algorithmand a predicted meanshift algorithm, and returning the definite position; and (4) data information conversion, namely converting the data information acquired in the human face characteristic point positioning and tracking step to acquire the motion information of the human face. The method can overcome the defects in the prior art, and can achieve live human face cartoon driving effect.

Description

technical field [0001] The invention relates to the technical field of animation driving, in particular to a video-based 3D facial expression animation driving method. Background technique [0002] As a special case of visual processing, face information processing has gradually become a research hotspot with the rapid development of computer technology and the promotion of commercial application requirements. It involves digital image processing, pattern recognition, artificial intelligence, physiology and psychology, etc. subject. The video-based face animation driving technology, which includes a key technology of face information processing such as face detection, tracking and feature location and extraction technology, has extremely important significance in the academic field and application field. Many aspects have a wide range of applications, such as video conferencing, online games, digital entertainment, etc. However, due to the influence of illumination, posture...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T13/40G06K9/00G06K9/62
Inventor 章毅王平安周激流郑伯川吕建成张蕾彭德中于佳丽
Owner SICHUAN UNIV
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