41.75648 py
54.740406 px
37.8191 pixel for each span
60.605885 perspect correct factor
23.489079 interpol paramet valu for pixe
21.46388 gradient calcul system
54.60594 an imag from a plane equat
54.995346 an edg stepper
46.55399 a span stepper
9.566776 a perspect correct factor w
13.186658 a gradient for each pixel
77.11002 a gradient calcul system
