Directional Correlation Filter Bank for Robust Head Pose Estimation and Face Recognition

Figure 4

Distance distributions between the test images and the templates. X axis represents different persons (i.e., class ID) while Y axis means the distance between a test image and the templates. The blue points (“+”) indicate the distances between the test images and the left-profile template; the green points (“o”) show the distances between the test images and the frontal template; and the red points (“”) represent the distances between the test images and the right-profile template. The test images are left-profile images (left column), frontal images (middle column), and right-profile images (right column), respectively.