  The paper presents an alternative way to classical stereocorrelation. First,
2D image processing of random patterns is described. Sub-pixel displacements
are determined using phase analysis. Then distortion evaluation is presented.
The distortion is identified without any assumption on the lens model because
of the use of a grid technique approach. Last, shape measurement and shape
variation is caught by fringe projection. Analysis is based on two pin-hole
assumptions for the video-projector and the camera. Then, fringe projection is
coupled to in-plane displacement to give rise to 3D measurement set-up.
Metrological characterization shows a resolution comparable to classical
(stereo) correlation technique (1/100th pixel). Spatial resolution seems to be
an advantage of the method, because of the use of temporal phase stepping
(shape measurement, 1 pixel) and windowed Fourier transform (in plane
displacements measurement, 9 pixels). Two examples are given. First one is the
study of skin properties; second one is a study on leather fabric. In both
cases, results are convincing, and have been exploited to give mechanical
interpretation.
