Fig. 1. Compensation result diagram of phase error. (a) Inverse error compensation method; (b) comparison of different error compensation methods

Fig. 2. Phase error distribution before and after phase shifting. (a) 3-step phase shifting; (b) 4-step phase shifting

Fig. 3. Absolute phase recovery of the standard plane. (a) Before compensation; (b) after compensation

Fig. 4. Absolute phase recovery of plaster statue. (a) Original plaster image; (b) principal phase map; (c) without phase compensation; (d) absolute phase recovery with active phase error compensation method at Vgamma=1.712; (e) phase compensation with proposed method

Fig. 5. Phase recovery of cup surface with proposed method. (a)~(d) Fringe projection map of zero initial phase and 3-step phase shifting with fringe frequencies of 1, 4, 16 and 64 respectively; (e) fringe projection map of π/3 initial phase with fringe frequency of 64; (f)~(j) principal phase map of (a)~(e) respectively; (k)~(l) absolute unwrapped phase of frequencies of 4 and 16; (m) principal phase map of frequency of 64 with nonlinear error correction; (n) high resolution absolute unwrapped phase ma

Fig. 6. Phase recovery result diagram. (a) Without phase compensation; (b) phase compensation with proposed method