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Figure 4 | EURASIP Journal on Image and Video Processing

Figure 4

From: An automated chimpanzee identification system using face detection and recognition

Figure 4

Local feature extraction. The positions of the applied SURF descriptor for local feature extraction. Three out of six positions for local feature extraction are located under and between both eyes; the remaining three interest points are situated on the nose tip and both nostrils. The mouth region is not used for feature extraction because we especially noticed that this region is often subject to occlusion and facial expressions.

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