The 1-st order jet of a functionfis characterized by three slots: the coordinatex, the value offatx,\(y = f(x)\)and the value of its derivative\(p = f'(x)\). The latter is the slope of the tangent to the graph offat the point\(a = (x, f(x) )\)of\(\mathbb {R}\)....
The shape of the upper eyelid can be approximated to a parabola. In step201, the facial landmark points (shown in FIG. 5, and obtained as described above) along the eyelid and the canthi are received (from step103). The eight points indexed from 37-40 for the right eye and 43-46 ...