The aim of this work is the development of an image analysis technique for 3D shape acquisition, based on luminous fringes projections. More in detail the method is based on the simultaneous use of several projectors, which is desirable whenever the surface under inspection has a complex geometry, with undercuts or shadow areas. In these cases, the usual fringe projection technique needs to perform several acquisitions moving each time the projector or using several projectors alternately. Besides the procedure of fringes projection and phase calculation, an unwrap algorithm has been developed in order to obtain continuous phase maps. These are used in the subsequent stereoscopic calculation. With the technique of simultaneous projections, oriented in such a way to cover all the surface, it is possible to increase considerably the velocity of the acquisition process without significant loss of accuracy.
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