SUPER-RAPID THREE-DIMENSIONAL TOPOGRAPHY MEASUREMENT METHOD AND SYSTEM BASED ON IMPROVED FOURIER TRANSFORM CONTOUR TECHNIQUE

摘要

A super-rapid three-dimensional topography measurement method and system based on an improved Fourier transform contour technique. The method comprises: firstly calibrating a measurement system to obtain calibration parameters, then cyclically projecting 2n patterns into a measured scene by means of a projector, wherein n patterns are different binary high-frequency sinusoidal stripes, and the other n patterns are all all-white images with pixel values of 1, and projecting the all-white images between every two binary high-frequency sinusoidal stripes, and synchronously acquiring images using a camera; and then performing phase unwrapping on wrapped packages to obtain preliminary absolute phases, and correcting the preliminary absolute phases, and finally, rebuilding a three-dimensional topography of the measured scene with the corrected absolute phases and the calibration parameters, so as to obtain 3D space coordinates of the measured scene in a world coordinate system, thereby completing three-dimensional topography measurement of an object.