Dan Liu, Bin Zhang, Huixian Li, Wenhao Song, Fengyu Li, Tengda Yang. Detection of Micro-Cylinder End Face Defect in Complex Background[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061006
- Laser & Optoelectronics Progress
- Vol. 55, Issue 6, 061006 (2018)
Fig. 1. System framework of image processing
Fig. 2. (a) Ordinary light source; (b) left structure light; (c) right structure light; (d) diagram of acquisition device
Fig. 3. Flow chart of defect area extraction
Fig. 4. (a) Raster stripe with break; (b) enlarged figure of fracture; (c) image after connection
Fig. 5. Template matching of the fifth grating stripes
Fig. 6. Distance of the fifth raster to template
Fig. 7. (a) Approximate area of defects; (b) intersection scatter plot; (c) Delaunay triangulation; (d) exact area of defects
Fig. 8. Different columnar sample defects. (a) Perforated magnetic sample; (b) solid magnetic sample; (c) aluminum column sample; (d) ceramic sample
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Table 1. Test results of various methods
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Table 2. Test results of columnar samples
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Table 3. Comparison of test results on four kinds of columnar samples by different methods
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