The Dual-Frequency Grating Phase Measuring Profilometry for 3D Human Body Measurement

Grating is an important approach in non-touch 3D measurement technology.Based on analysis on the current technology in grating profilometry,a modified 3D measurement technique system of dual-frequency grating phase measuring profilometry for human body with parallel axis system and lens shift technology is presented.The error spread in phase unwrapping algorithm in single frequency grating is avoided,the nonlinear problem in crossed-optical-axes is solved in phase-height algorithm,and the effective measuring area is expended by this system.The measurement and rebuilt of a dummy indicates that this method is accurate and practical.