Title :
Eye and lip enhancement for low-rate videophony
Author :
Streit, J. ; Hanzo, L. ; Bradshaw, B.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
A generic parametric coding enhancement for employment in very low-rate videophone systems is proposed in order to improve the subjectively important eye and lip representation. The four-step algorithm 1 identifies the position of the eyes, nostrils, lips and nose using pre-precessing and pattern-matching and after luminance adjustment and smoothing it overlays the best-matching entries from a trained codebook, if deemed beneficial in image quality terms. The benefits of the technique are demonstrated using the example of an 11.36 kbps fixed-rate quad-tree codec
Keywords :
feature extraction; image enhancement; image matching; image representation; video codecs; video coding; videotelephony; 11.36 kbit/s; algorithm; eye enhancement; eye representation; fixed-rate quad-tree codec; generic parametric coding enhancement; image quality terms; lip enhancement; lip representation; low-rate videophony; luminance adjustment; nose; nostrils; pattern-matching; pre-precessing; trained codebook; Codecs; Decoding; Eyes; Finite impulse response filter; Lips; Mouth; Nose; Pattern matching; Videophone systems; World Wide Web;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-3692-5
DOI :
10.1109/PIMRC.1996.568442
