Robust spatiotemporal quadrature filter for multiphase stepping.
A robust algorithm for phase recovery from multi-phase-stepping images is presented. This algorithm is based on the minimization of an energy (cost) functional and is equivalent to the simultaneous application of a fixed temporal quadrature filter and a spatial adaptive quadrature filter to the phase-stepping pattern ensemble. The algorithm, believed to be new, is specially suited for those applications in which a large number of phase-stepping images may be obtained, e.g., profilometry with a computer-controlled fringe projector. We discuss the selection of parameter values and present examples of its performance in both synthetic and real image sequences.
Rivera
M
M
Centro de Investigación en Matemá ticas, Apartado Postal 402, Guanajuato, Guanajuato 36000, Mexico. mrivera@fractal.cimat.mx
Marroquin
J L
JL
Botello
S
S
Servín
M
M