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MPEG―4中脸部动画参数和序列重绘的肌肉模型

DOI: 10.11834/jig.20010109

Keywords: MPEG-4,FAP,FDP,人脸重绘,肌肉模型,脸部动画参数,图象压缩,图象编码

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Abstract:

MPEG-4中定义了“人脸对象”这样一种特殊的视频对象,并通过脸部动画参数FAP和脸部定义参数FDP来对这类对象进行编码,以实现极低码率的视频编码。通过对MPEG-4中“人脸对象”这类视频码流的句法结构和参数编码方法的详细分析。以及通过对MEPG-4解码器图象重绘(rendering)过程的研究,在Waters的以肌肉收缩强度为参数的肌肉模型基础上,提出了更适应于MPEG-4参数的位移控制肌肉模型(displacement-controllingmusclemodel),从而实现了通过利用MEPG-4码流中的FAP和FDP参数来重建自然表情的人脸视频序列。

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