Fig. 1. Schematic diagram of conventional high-speed 3D measurement
Fig. 2. Schematic of accurate phase acquisition. (a) Phase with noise;(b) proposed PDNet;(c) result by the proposed method
Fig. 3. Structure of the PDNet
Fig. 4. Simulation results. (a) Phase map with noise;(b) result by the proposed method;(c) comparison of the phase in the 100th column from Fig. 4(a),4(b) and the ground truth;(d) plotting error curves of the 100th column of Fig. 4(b) and 4(c)
Fig. 5. Phase error of simulated wrapped phase at T = 48,54,60,66,72,78
Fig. 6. Experiment results. (a) Phase map with noise;(b) result by the proposed method;(c) comparison of the phase in the 100th column from Fig. 6(a), 6(b) and the ground truth;(d) plotting error curves of the 100th column of Fig. 6(b) and 6(c)
Fig. 7. Phase error of actual measurement of wrapped phase at T= 48, 54, 60, 66, 72, 78
Fig. 8. Wrapping phase map before and after denoising and its error comparison. (a) Phase map with noise;(b) result by the proposed method;(c) phase error before denoising;(d) phase error after denoising
Fig. 9. Comparison of reconstruction results. (a) Reconstruction results before processing using the proposed method;(b) ideal reconstruction results;(c) reconstruction result by the proposed method;(d) reconstruction error curve
| | Type | Out-F | Out-Res | ENCODER | 1 | Downsampler block | 16 | 512×256 | | 2 | Downsampler block | 64 | 256×128 | | 3−7 | 5 × Non-bt-1D | 64 | 256×128 | | 8 | Downsampler block | 128 | 128×64 | | 9 | Non-bt-1D(dilated 2) | 128 | 128×64 | | 10 | Non-bt-1D(dilated 4) | 128 | 128×64 | | 11 | Non-bt-1D(dilated 8) | 128 | 128×64 | | 12 | Non-bt-1D(dilated 16) | 128 | 128×64 | | 13 | Non-bt-1D(dilated 2) | 128 | 128×64 | | 14 | Non-bt-1D(dilated 4) | 128 | 128×64 | | 15 | Non-bt-1D(dilated 8) | 128 | 128×64 | | 16 | Non-bt-1D(dilated 16) | 128 | 128×64 | DECODER | 17 | Deconvolution (unsampling) | 64 | 256×128 | | 18−19 | 2 × Non-bt-1D | 64 | 256×128 | | 20 | Deconvolution (unsampling) | 16 | 512×256 | | 21−22 | 2 × Non-bt-1D | 16 | 512×256 | | 23 | Deconvolution (unsampling) | C | 1 024×512 |
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Table 1. Main network modules and parameters