Yongshun Qu, Guiying Yu, Baowu Zhang, Meidan Zhao, Ruijie Lin. Simulation Research on Illumination Scheme for Bottom Defect Detection of Metal Barrel[J]. Laser & Optoelectronics Progress, 2021, 58(8): 0822001
- Laser & Optoelectronics Progress
- Vol. 58, Issue 8, 0822001 (2021)
Fig. 1. Optical path diagram for endoscopic non-positive illumination
Fig. 2. Geometric relationship of bidirectional scattering distribution function
Fig. 3. Distribution map of target surface test areas
Fig. 4. Structural model of bottom illumination system of metal barrel
Fig. 5. Model of image acquisition system
Fig. 6. Illuminance distributions and illuminance curves of target plane illuminated at different positions. (a1) (a2) 800 mm; (b1) (b2) 750 mm; (c1) (c2) 700 mm; (d1) (d2) 650 mm; (e1) (e2) 600 mm; (f1) (f2) 550 mm
Fig. 7. Bottom images of barrel illuminated at different positions in verification experiment and illumination compensation map. (a) 800 mm; (b) 750 mm; (c) 700 mm; (d) 650 mm; (e) illumination compensation map
Fig. 8. Defect recognition for each illumination scheme
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Table 1. Illuminance uniformity of object surface illuminated at different positions
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