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Table 1 Average percentage deviation of the eight real valued parameters for different expressions from 97 subjects

From: Facial expression (mood) recognition from facial images using committee neural networks

Real valued parameter Average percentage deviation from neutral value
  Neutral Angry Disgust Fear Happy Sad Surprised
Eyebrow raise
distance
0.00 -28.04 -36.86 1.43 1.54 5.29 49.67
Upper eyelid-
eyebrow distance
0.00 -31.18 -26.47 4.15 11.91 15.03 106.12
Inter eyebrow
distance
0.00 -22.36 -9.45 -16.09 -0.50 -6.43 5.62
Upper eyelid-
lower eyelid
distance
0.00 -34.60 -49.52 -18.69 -20.07 -13.04 25.13
Top lip
thickness
0.00 -49.99 -10.20 -17.46 -11.04 -23.31 1.27
Bottom lip
thickness
0.00 -51.77 -6.83 -23.55 -10.92 -8.80 23.65
Mouth width 0.00 -8.19 -7.48 9.90 33.35 -4.04 -14.62
Mouth opening 0.00 -7.74 95.37 738.30 785.81 2.55 2489.00