Fig. 1. Comparison of relative and absolute phase unwrapping. (a) Principles of absolute and relative phase unwrapping; (b) relative and absolute phase unwrapping results

Fig. 2. Improved data decoding

Fig. 3. 3D point cloud distribution of mask

Fig. 4. 2D images after encoded. (a) Fringe pattern of channel R; (b) fringe pattern of channel G; (c) fringe pattern of channel B

Fig. 5. Decoding results of traditional method

Fig. 6. Data changing in channel B. (a) Raw data of channel B; (b) data with quantization error after suppression and storage

Fig. 7. Phase unwrapping results. (a) Relative phase unwrapping results; (b) absolute phase unwrapping results; (c) corrected results

Fig. 8. New decoded data of 3D point cloud

Fig. 9. 3D point cloud data distribution. (a) Mask; (b) mickey; (c) statue; (d) ball abutment; (e) cone abutment; (f) hemisphere

Fig. 10. Comparisons of decoding results of two methods when compression ratio is 1∶48.3. (a) 3D data to be encoded; (b) decoding results of proposed method; (c) decoding results of method in Ref. [13]; (d) error distribution of proposed method; (e) error distribution of method in Ref. [13]

Fig. 11. Comparisons of decoding results of two methods when compression ratio is 1∶70.7. (a) 3D data to be encoded; (b) decoding results of proposed method; (c) decoding result of method in Ref. [13]; (d) error distribution of proposed method; (e) error distribution of method in Ref. [13]