Guanyu Hou, Bin Wu, Rongfang He, Weibin Zhang. Three-Dimensional Measurement Method of Defects Based on Binocular Grating Reconstruction and Texture Mapping[J]. Acta Optica Sinica, 2022, 42(7): 0712003
- Acta Optica Sinica
- Vol. 42, Issue 7, 0712003 (2022)
Fig. 1. Schematic diagram of binocular grating projection reconstruction system
Fig. 2. 3D reconstruction system with turntable and texture camera
Fig. 3. Comparison of effect of texture mapping before and after occlusion judgment. (a) Original point cloud data; (b) direct apping result; (c) texture image; (d) mapping result after occlusion judgment (eliminated points are displayed in black)
Fig. 4. Segmentation and search method of finding four closest points
Fig. 5. Conversion of selected image pixels to spatial points
Fig. 6. Measurement system structure
Fig. 7. Two kinds of test objects and their defect labels. (a) Test object 1; (b) test object 2
Fig. 8. Reconstruction results of 5 scratches on the inner surface of the test object 1. (a) Reconstruction result obtained by the interpolation method proposed in this paper; (b) reconstruction result by using the method of direct searching to find the point cloud in the contour
Fig. 9. Comparison of measured defect widths and results of image measurement instrument
Fig. 10. Reconstruction results of surface defects of test object. (a) Reconstruction result after point cloud interpolation; (b) reconstruction result obtained by using method of direct searching point clouds in contour
Fig. 11. Defect distance measurement data and error
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Table 1. Defect width measurement data and error
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Table 2. Simulated defect area measurement results
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