形态学算子：骨架化操作

Halcom

骨架化操作：将二值化图像膨胀后，再skelelon，以使断开的缺陷链接起来。

1. * Acquire image
   
2. read_image (Image, 'surface_scratch')
   
3. get_image_size (Image, Width, Height)
   
4. * Using a local threshold
   
5. mean_image (Image, ImageMean, 7, 7)
   
6. dyn_threshold (Image, ImageMean, DarkPixels, 5, 'dark')
   
7. *
   
8. * Extract connected components
   
9. connection (DarkPixels, ConnectedRegions)
   
10. *
    
11. * Select large regions
    
12. select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 10, 1000)
    
13. * Merge fractioned scratches via morphology
    
14. union1 (SelectedRegions, RegionUnion)
    
15. dilation_circle (RegionUnion, RegionDilation, 3.5)
    
16. skeleton (RegionDilation, Skeleton)
    
17. connection (Skeleton, Errors)
    
18. dev_set_colored (12)
    
19. dev_display (Image)
    
20. dev_display (Errors)

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