3-D visual reconstruction without system calibration

A novel method of 3-D visual reconstruction without system calibration, which is based on phase map, is proposed to solve the problem of the dependency on calibration information in traditional 3-D reconstruction. Firstly, the phase map of the scanned object is obtained by structured light illumination. Then the horizontal and vertical spatial distortions of the phase image are used to calculate the relative depth of the scanned object. Finally, the 3-D visual reconstruction of the scanned object is realized. This method can be applied in some 3-D applications where the calibration information cant be obtained. Experiment results show good 3-D visual reconstruction result when the surface structure of the scanned object is simple. Comparing with the traditional 3-D reconstruction results, it is proved that this algorithm is valid.