A digital shadow moire technique is applied to obtain surface contours by a
dopting the concept of digital speckle pattern interferometry (DSPI) phase-
shifting methods. The idea is based on the fact that the mathematical expre
ssions of the resulting moire patterns mathematically resembles those of th
e DSPI methods. Consequently, by grating shifting it is possible to obtain
phase maps using the same DSPI algorithms. A brief theoretical approach is
outlined and experimental results, performed under white light illumination
, are shown.