Nonparametric Facial Feature Localization Using Segment-Based Eigenfeatures

Table 1

Performance comparison of facial feature localization.

Method∖Process	HOG calculation	Directional vector; EDVs or ANNS or NNS	WVC	Total time consumption	Storage size (%)	Average error/standard deviation (with 10% occlusion)
EHOGs + EDVs 60%	3 ms	3 ms	5 ms	11 ms	5.0 MB (2.7%)	0.0572/0.0193 (0.0593/0.0213)
EHOGs + EDVs 80%		7 ms		15 ms	11.4 MB (6.2%)	0.0526/0.0189 (0.0571/0.0204),
EHOGs + EDVs 95%		16 ms		24 ms	25.5 MB (13.8%)	0.0475/0.0167 (0.0515/0.0192),
EHOGs + EDVs 99%		25 ms		33 ms	39.8 MB (21.5%)	0.0457/0.0156 (0.0506/0.0189),
HOG + ANNS [4] (); HOG + NNS (ANNS with )	483 ms	16 ms; 1490 ms		499 ms; 1978 ms	185.3 MB (100%); 185.3 MB (100%)	0.0527/0.0151 (0.0631/0.0185); 0.0507/0.0136 (0.0602/0.0174)