Long Ma, Ruijie Qian, Yuzhe Liu, Hongyue Xu, Xin Pei, Fengming Sun. HSI Model-Based Three-Dimensional Rapid Measurement Method for Aero-Engine Blades[J]. Laser & Optoelectronics Progress, 2020, 57(19): 191204
- Laser & Optoelectronics Progress
- Vol. 57, Issue 19, 191204 (2020)
Fig. 1. HSI color model. (a) Double cone model; (b) hue distribution
Fig. 2. RGB plane with I=0.5
Fig. 3. Measurement hardware system
Fig. 4. Comparison of projected images before and after color correction. (a) Before color correction; (b) after color correction
Fig. 5. Hue correction contrast. (a) Hue and ideal hue after correction; (b) error distribution of hue after correction
Fig. 6. System structure diagram
Fig. 7. Calibration of measurement system. (a) Calibration method of mapping relationship between h and ΔH; (b) height error
Fig. 8. Repeated measurement results of standard gauge block grinding surface. (a) Height contour; (b) measurement error
Fig. 9. Corresponding color of hue values in range of 0°-360°
Fig. 10. Process of calculating hue components of color projection pattern. (a) Grayscale transformation relationship corresponding to 0°-360°; (b) color projection pattern; (c) normalized conversion to hue gamut; (d) hue distribution at mark line
Fig. 11. Schematic of wrapped hue and color bar coding cut line
Fig. 12. Dividing process of fringe boundary on discontinuous surface. (a) Wrapped hue; (b) color bar coding; (c) fringe boundary division; (d) boundary division section line
Fig. 13. Hue unwrapping results. (a) Three-dimensional result; (b) section of hue unwrapped at marking line
Fig. 14. Measurement results of aero-engine compressor blades. (a) Captured image of blade; (b) color pattern; (c) wrapped hue value; (d) color bar code; (e) three-dimensional shape of compressor blade
Fig. 15. Error distribution of proposed method
Fig. 16. Compressor blade profile parameters
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Table 1. Composition of color stripe coding
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Table 2. Comparison of time used for different algorithms to calculate hue
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Table 3. Comparison of efficiency of wrapped phase/hue acquisition methods
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Table 4. Comparison of efficiency of phase/hue unwrapping methods
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