Diapositiva PPT
Principle : use structured light to relate displacement d(x) of a projected line to the
height h(x) for each point along a line which runs from first to last column.
Angle a can be calibrated by measuring d and h for an object of known height like
Moving the object along the y axis under stationary camera and light line projector
we can scan all or most of the object surface, and obtain h(x, y) for all x, y.