Method for measurement of high speed 3d shape using selective long period

The present invention reduces the three-dimensional shape measuring time by irradiating the grating pattern light having the frequency of different sizes with only one projector is selected, and the other projector calculates height information by irradiating a grating pattern only light having a single cycle, while It relates to a high-speed three-dimensional shape measuring method using a selective large cycle the correct configuration measurable.