Figure 1
From: Own-race and own-species advantages in face perception: a computational view
Species and race comparisons.
(A,H). Exemplar faces. The chimpanzee face was contributed by the Great Ape Research Institute (GARI), the human faces were contributed by Heinrich Bulthoff and the ScanLab at the Max Planck Institute for Biological Cybernetics, Tubingen, Germany (see Methods and Acknowledgements for details). (A,B,H,I.) Feature extraction using topological features. (A,H.) The original faces (left column) and the extracted features (right column). (B,I.) The horizontally average profile. (C–G,J–N.) Projections in features space. (C,J.) Principle components of human and chimpanzee (C) and Asian and Caucasian faces (J). Distributions are different, thus a system has to adapt if either of the classes are new to the system. (D,K.) Means (extracted in PCA) are also different. (E, F,L,M.) Chimpanzee and human (E,F) and Asian and Caucasian faces (L,M) projected with LFD. Note that individuals are grouped together (same color). (G,N.) Distance in LFD space for chimpanzee and human (G) and Asian and Caucasian faces (N).
