A method for improving the accuracy of orthogonal composite light 3-D measurement is presented based on the shifted-phase calibration between fringes.Due to the effect of filtering in spatial frequency domain,the shifted phase between the deformed fringes demodulated from the composite gating image is changed,which leads to large phase error if the traditional phase algorithm is used.In this paper,the phase-shifting sine fringes demodulated from the composite grating image captured on the refere...