19 April 2000 Facial motion parameter estimation and error criteria in model-based image coding
Author Affiliations +
Abstract
Model-based image coding has been given extensive attention due to its high subject image quality and low bit-rates. But the estimation of object motion parameter is still a difficult problem, and there is not a proper error criteria for the quality assessment that are consistent with visual properties. This paper presents an algorithm of the facial motion parameter estimation based on feature point correspondence and gives the motion parameter error criteria. The facial motion model comprises of three parts. The first part is the global 3-D rigid motion of the head, the second part is non-rigid translation motion in jaw area, and the third part consists of local non-rigid expression motion in eyes and mouth areas. The feature points are automatically selected by a function of edges, brightness and end-node outside the blocks of eyes and mouth. The numbers of feature point are adjusted adaptively. The jaw translation motion is tracked by the changes of the feature point position of jaw. The areas of non-rigid expression motion can be rebuilt by using block-pasting method. The estimation approach of motion parameter error based on the quality of reconstructed image is suggested, and area error function and the error function of contour transition-turn rate are used to be quality criteria. The criteria reflect the image geometric distortion caused by the error of estimated motion parameters properly.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yunhai Liu, Yunhai Liu, Lu Yu, Lu Yu, Qingdong Yao, Qingdong Yao, "Facial motion parameter estimation and error criteria in model-based image coding", Proc. SPIE 3974, Image and Video Communications and Processing 2000, (19 April 2000); doi: 10.1117/12.383018; https://doi.org/10.1117/12.383018
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT

Model-based head tracking and 3D pose estimation
Proceedings of SPIE (September 23 1998)
Model-based hierarchical motion compensation technique
Proceedings of SPIE (September 15 1996)
Model-based coding for multiobject sequence
Proceedings of SPIE (December 28 2000)
Robust tracking of head and arm for model based image...
Proceedings of SPIE (September 15 1994)

Back to Top