Author Affiliations
1School of Artificial Intelligence, Tiangong University, Tianjin 300387, China2School of Control Science and Engineering, Tiangong University, Tianjin 300387, Chinashow less
Fig. 1. Flow chart of the proposed scheme
Fig. 2. Fringe background separation. (a) Original left view image; (b) fringe information of left view; (c) background information of left view; (d) original right view image; (e) fringe information of right view; (f) background information of right view
Fig. 3. Phase segmentation. (a) Binary mask of right view; (b) phase division
Fig. 4. Local map of wrapped phase. (a) Wrapped phase of left view; (b) wrapped phase of right view
Fig. 5. Phase unwrapping initial point discrimination
Fig. 6. Regional phase unwrapping. (a)‒(c) Phase unwrapping process of left view; (d)‒(f) phase unwrapping process of right view
Fig. 7. Regional disparity matching. (a) Phase unwrapping of left view; (b) phase unwrapping of right view; (c) isolated object region partitioning; (d) disparity map of region 1; (e) disparity map of region 1 and region 2; (f) disparity map of the entire region
Fig. 8. Experimental setup diagram
Fig. 9. Multi-frequency heterodyne fringe patterns of a standard sphere. (a) Sinusoidal fringe patterns with a frequency of 16; (b) sinusoidal fringe patterns with a frequency of 18; (c) sinusoidal fringe patterns with a frequency of 21
Fig. 10. Wrapped phase. (a) (b) Four-step phase shift method; (c) (d) single-frame-based phase retrieval method
Fig. 11. Unwrapped phase. (a)(b) Unwrapped phase of multi-frequency heterodyne; (c)(d) unwrapped phase of four-step phase shifting; (e)(f) unwrapped phase of single-frame-based phase retrieval method
Fig. 12. Comparison of standard sphere point clouds. (a) Multi-frequency heterodyne; (b) four-step phase shifting; (c) single-frame-based phase retrieval method
Fig. 13. Original images of two sets of isolated objects. (a) Parallel placed isolated objects for left camera; (b) parallel placed isolated objects for right camera; (c) front and back placed isolated objects for left camera; (d) front and back placed isolated objects for right camera
Fig. 14. Experimental results of isolated objects. (a) (b) Unwrapped phase for left camera; (c) (d) unwrapped phase for right camera; (e) (f) wrapped phase for left camera; (g) (h) wrapped phase for right camera; (i) (j) reconstructed point clouds
Fig. 15. 3D reconstruction of dynamic object. (a)‒(d) Original images; (e)‒(h) wrapped phases; (i)‒(l) reconstructed point clouds
Data set | Multi-frequency heterodyne | Four-step phase shifting | Single frequency single step |
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Avg error | 0.0197 | 0.0135 | 0.0347 | 1 | 38.1066 | 38.1315 | 38.1520 | 2 | 38.1103 | 38.1189 | 38.0538 | 3 | 38.0917 | 38.1301 | 38.0916 | 4 | 38.0915 | 38.1291 | 38.0782 | 5 | 38.1197 | 38.1313 | 38.0599 | 6 | 38.1001 | 38.1224 | 38.0947 | 7 | 38.0692 | 38.1166 | 38.1109 | 8 | 38.0685 | 38.1032 | 38.1059 | 9 | 38.0942 | 38.1252 | 38.0470 | 10 | 38.0854 | 38.1272 | 38.0572 |
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Table 1. Reconstruction accuracy of a standard sphere