Zhian Wu, Xiaoyu Zhu, Jian Li, Biao Zhang, Chuanlong Xu. Volumetric-Calibration Ray Tracing-Based Calculation Method of Weight Coefficient in Light Field PIV[J]. Acta Optica Sinica, 2021, 41(20): 2010001
- Acta Optica Sinica
- Vol. 41, Issue 20, 2010001 (2021)
Fig. 1. Principle of light field imaging
Fig. 2. Principle of extracting light field subaperture image
Fig. 3. Numerical verification diagram of weight coefficient calculation method
Fig. 4. Weight coefficient atlas at different depth positions
Fig. 5. Similarity of weight coefficients at different depth positions
Fig. 6. Weight construction results of calibration plate at different depth positions. (a) VCT method; (b) DRT method
Fig. 7. Reconstruction accuracy of calibration plate dot position. (a) Location errors in lateral; (b) location errors in depth
Fig. 8. Reconstructed stretch length of calibration plate dot. (a) Lateral elongation; (b) depth elongation
Fig. 9. Verification system of weight coefficient calculation experiment. (a) Schematic diagram; (b) physical figure
Fig. 10. Cage light field camera
Fig. 11. Light field images of calibration plate taken at different depth positions in experiment. (a) z=-5 mm; (b) z=0; (c) z=5 mm
Fig. 12. Reconstruction of the accuracy of position of calibration plate in experiment. (a) Location errors in lateral; (b) location errors in depth
Fig. 13. Reconstructed stretch length of dots on reconstituted calibration plate in experiment. (a) Lateral elongation; (b) depth elongation
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Table 1. Parameters of light field camera
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Table 2. Central coordinates of voxelunit: mm
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