
Feature  Brief description 

FD _  Distance between points and in a frontal (or profile) image 
FDH _  Horizontal distance between and in an image 
FDV _  Vertical distance between and in an image 
FA __  Angle of three points , , and in an image 
FA _  Angle between the line through 2 points and and a horizontal line 
FR02_psu  FD(17, 26)/FD(18, 25) 
FR03_psu  (FD(18, 25) + FD(118, 125))/FDH(33, 133) 
FR05_psu  FDH(33, 133)/FD(43, 143) 
FR06_psu  FDH(33, 133)/FDV(52, 50) 
FR08_psu  FD(43, 143)/FDV(52, 50) 
FArea02  Area of the contour formed by the points 53, 153, 133, 194, 94, 33, and 53 
FArea03  Area of the contour formed by the points 94, 194, 143, 43, and 94 
Fh_Cur_Max_Distan  Distance between points 7 and 77 in a profile image 
Fh_Angle__  Angle between the line through 2 points and and a horizontal line 
Nose_Angle__  Angle between the line through 2 points and and a horizontal line 
Nose_Angle__ _  Angle of 3 points , , and in a frontal(or profile) image 
SAn 1_  Angle between the line through 2 points and and a horizontal line 
Fh_Cur_Max_R79_69  FD(77, 9)/FD(6, 9) 
Nose_Area___  Area of the triangle formed by 3 points , , and in a profile image 
EUL_L_el1 ~ EUL_L_el7  Slope of the tangent at a point (el1el7) in a frontal image 
EUL_L_DH  FDH(el1, el7) 
EUL_L_MAX  FDH(el1, ) 
EUL_L_RMAX  FDH(el1, )/FDH(el1, el7) 
EUL_L_Sb  FDV(el7, el1)/FDH(el7, el1) 
EUL_L_St  FDV(, el7)/FDH(, el7) 
EUL_L_Sf  FDV(, el1)/FDH(, el1) 
EUL_L_Khmean  Average curvature of the left (or right) upper eyelid contour 
EUL_L_khmax  Maximum curvature of the left (or right) upper eyelid contour 
EUL_R_er1~ EUL_R_er7  Slope of the tangent at a point (er1er7) in a frontal image 
EUL_R_DH  FDH(er1, er7) 
EUL_R_MAX  FDH(er1, ) 
EUL_R_RMAX  FDH(er1, )/FDH(er1, er7) 
EUL_R_Sb  FDV(er7, er1)/FDH(er7, er1) 
EUL_R_St  FDV(, er7)/FDH(, er7) 
EUL_R_Sf  FDV(, er1)/FDH(, er1) 
EUL_R_Khmean  Average curvature of the left (or right) upper eyelid contour 
EUL_R_khmax  Maximum curvature of the left (or right) upper eyelid contour 
PDH44_53  Horizontal distance between and in a frontal (or profile) image 
