3-D measurement of dynamic and isolated objects based on color-encoded sinusoidal fringe

When 3-D shapes of dynamic objects, especially with isolated area and discontinuous distribution, are measured with the traditional fringe projection and phase analysis method, it is difficult to get reliable expansion phase. A technique based on color-encoded sinusoidal fringe projection was proposed to solve the problem. The projected sinusoidal fringes were marked with two-level encoded color. After capturing the deformed fringe pattern, the fringe order was determined according to the color sequence based on the coded characteristics, and the cut-off phase was unwrapped. Finally, the 3-D shape of the dynamic object with isolate area was reconstructed. The results show the decoding method is stable and reliable. 3-D shape of the spatially isolated dynamic objects can be exactly reconstructed with only one shot.