Wei Yin, Mingyu Li, Yan Hu, Shijie Feng, Xiaolei Zhang, Huai Wang, Qian Chen, Chao Zuo. Speckle Structured- Light- Based Three- Dimensional Imaging Technology and Its Sensor Design Using VCSEL Projection Array[J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811014
- Laser & Optoelectronics Progress
- Vol. 60, Issue 8, 0811014 (2023)
Fig. 1. Diagram of the hardware structure of the 3D structured-light sensor based on VCSEL projection array
Fig. 2. Diagram of a coarse-to-fine spatial-temporal speckle correlation algorithm
Fig. 3. Cost calculation method based on mutual information
Fig. 4. Single-pixel temporal matching method based on normalised mutual information
Fig. 5. Histogram of difference before and after interpolation using different interpolation functions. (a) Linear interpolation function; (b) parabolic interpolation function; (c) fused interpolation function
Fig. 6. 3D point cloud results using different interpolation functions. (a) Linear interpolation function; (b) parabolic interpolation function; (c) fused interpolation function
Fig. 7. Precision analysis result. (a) Measurement error curves at different distances; (b) point cloud results of the plane at 100 cm; (c) error histograms of the plane at 100 cm
Fig. 8. 3D measurement results of the human head model
Fig. 9. 3D measurement results of the David model
Fig. 10. Measurement error between the 3D point cloud output by different devices and the standard data
Fig. 11. Long-distance measurement experiment of metal parts. (a)-(c) Speckle images of metal screws stacked in different postures; (d)-(f) corresponding 3D point cloud results
Fig. 12. 3D measurement results for complex scene
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