Title :
An improved GAC model for lip contour detection
Author :
Feng, Xiaohui ; He, Qianhua ; Wang, Weining
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou
Abstract :
An improved model for lip contour detection is proposed in this paper, which incorporates prior shape information into geometric active contours (GAC). A new shape energy function dependent on the prior shape information is used in GAC with prior shape. And the external energy function used in this model, is depending on the information of the image gradient. Therefore, the boundary of object can be captured either by higher magnitude of the image gradient or by the minimum dissimilar between the evolutive shape and the average prior shape. Experiments on mouth images show that the accuracy improvement of the shape contour detection using GAC with prior shape is nearly 11% over GAC.
Keywords :
computational geometry; shape recognition; geometric active contours; image gradient; lip contour detection; shape energy function; shape information; Acoustic signal detection; Active shape model; Degradation; Helium; Level set; Linear discriminant analysis; Mouth; Power engineering and energy; Smoothing methods; Solid modeling;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697349