DocumentCode :
1482075
Title :
Face Region Based Conversational Video Coding
Author :
Xiong, Bing ; Fan, Xiaojiu ; Zhu, Ce ; Jing, Xuan ; Peng, Qiang
Author_Institution :
Sch. of Electr. & Elec tronic Eng., Nanyang Technol. Univ., Singapore, Singapore
Volume :
21
Issue :
7
fYear :
2011
fDate :
7/1/2011 12:00:00 AM
Firstpage :
917
Lastpage :
931
Abstract :
Face regions are visual focuses in conversational video communications, thus better reconstruction quality of the regions of interest (ROI) is highly desired or necessary in the bandwidth-constrained conversational video coding. In this paper, we introduce an efficient motion based face detection method to identify face blocks in the first step, which can reduce computational complexity substantially without any loss in face detection results. Then an active contour model is applied to find face contours for more refined and compact face regions. Based on the well-located and compact face regions, facial feature priority based bit allocation is proposed for face ROI based conversational video coding. Experimental results demonstrate that the proposed face region based coding can considerably improve the coding results in the face regions, compared with two other relevant video coding schemes, in terms of objective rate-distortion performance as well as subjective visual quality.
Keywords :
computational complexity; face recognition; image reconstruction; object detection; video coding; video communication; active contour model; bandwidth-constrained conversational video coding; compact face regions; computational complexity; conversational video communications; facial feature priority based bit allocation; motion based face detection method; objective rate-distortion performance; reconstruction quality; regions of interest; subjective visual quality; visual focuses; Encoding; Face; Face detection; Feature extraction; Image color analysis; Pixel; Video coding; Bit allocation; face detection; motion detection; video coding;
fLanguage :
English
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8215
Type :
jour
DOI :
10.1109/TCSVT.2011.2133530
Filename :
5739523
Link To Document :
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