Fig 1.
Complete flow diagram of the proposed spatially dense approach for FA calculation.
Fig 2.
The position of the 19 manual landmarks used for mapping validation.
Fig 3.
Using barycentric coordinates to transfer a landmark from one face to another.
The barycentric coordinates of point P are calculated with respect to triangle ABC. The obtained weights are then used in combination with the Euclidean coordinates of triangle A′B′C′ in Face2 to obtain the coordinates of P′.
Fig 4.
Boxplot chart of average landmark error between manual indications and automatic landmarks.
The plot shows the error between the average of manual indications of user 1 and user 2 (P1-P2), the error between the average of manual indications of user 1 and the algorithm (P1-Auto), the error between the average of manual indications of user 2 and the algorithm (P1-Auto), and the error between the average of manual indications of both users and the algorithm (Avg-Auto).
Fig 5.
Comparison between true simulated FA values (True FA), the FA values using all vertices (Algorithm).
Fig 6.
Asymmetry heat-map of a sample simulated face.
(a) and (b) show the true and the calculated respectively.
Fig 7.
Box-plot of the R2 values of all 300 simulated faces for the precision of the algorithm in localizing the FA values.