Abstract
In order to obtain the absolute phase value of a surface in phase measuring profilometry(PMP),a phase unwrapping method based on multi-frequency interferometry by projecting three different frequency fringes is deduced.Meanwhile,in order to reduce errors and improve measuring accuracy,a phase correction method is proposed and a comparision between the original and revised images is made.This method can very effectively remove the phase error.On the revised absolute phase value as a feature for matching in stereo binocular vision,the object of three-dimensional features can be calculated based on stereo binocular visual method.The experiment shows that this method is feasible,and a good measurement result is obtained.
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