Zhijing Yu, Xin Li, Yanling Li, Zechuan Li, Jingchang Zhuge. Minor Damage Location Method for Aircraft Skins Based on Marked Honeycomb Model[J]. Laser & Optoelectronics Progress, 2019, 56(18): 180301
- Laser & Optoelectronics Progress
- Vol. 56, Issue 18, 180301 (2019)
Fig. 1. Basic point transfer model of honeycomb model
Fig. 2. RRT reflective marks
Fig. 3. Pixel edge of feature control point
Fig. 4. Radial grayscale gradient
Fig. 5. Subpixel edge point
Fig. 6. Diagram of projection of circular inscribed hexagon
Fig. 7. Cross ratio invariance principle in hexagon
Fig. 8. Diagram of experimental device
Fig. 9. Schematic of experimental process
Fig. 10. Control point layout model of damaged skin
Fig. 11. Damage to surface of aircraft skin. (a) Normal skin; (b) crack; (c) corrosion; (d) strike; (e) scratch
Fig. 12. 3×3 template images after adaptive median filtering. (a) Normal; (b) crack; (c) corrosion; (d) strike; (e) scratch
Fig. 13. Error values and time consumptions of three algorithms. (a) Error in image; (b) time consumption; (c) relative truth error
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Table 1. Center coordinate results of four groups of control points under three different methodspixel
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