划痕检测，求帮我

來學習的

参考一下这一段，图像处理那段修改一下，先阈值把中间圆环区域提取出来再往下走，应该就可以实现你这个功能了

1. list_files ('C:/Users/njtl003/Desktop/51halcon划痕图像', ['files','follow_links'], ImageFiles)
   
2. tuple_regexp_select (ImageFiles, ['\\.(tif|tiff|gif|bmp|jpg|jpeg|jp2|png|pcx|pgm|ppm|pbm|xwd|ima|hobj)$','ignore_case'], ImageFiles)
   
3. for Index := 0 to |ImageFiles| - 1 by 1
   
4.     read_image (Image, ImageFiles[Index])
   
5.     binary_threshold (Image, Region, 'smooth_histo', 'light', UsedThreshold)
   
6.     opening_circle (Region, RegionOpening, 5.5)
   
7.     connection (RegionOpening, ConnectedRegions)
   
8.     select_shape_std (ConnectedRegions, SelectedRegions, 'max_area', 70)
   
9.     fill_up (SelectedRegions, RegionFillUp)
   
10.     shape_trans (RegionFillUp, RegionOuter, 'outer_circle')
    
11.     difference (RegionFillUp, SelectedRegions, RegionDifference)
    
12.     opening_circle (RegionDifference, RegionOpening1, 5.5)
    
13.     connection (RegionOpening1, ConnectedRegions1)
    
14.     select_shape_std (ConnectedRegions1, SelectedRegions1, 'max_area', 70)
    
15.     shape_trans (SelectedRegions1, RegionInner, 'outer_circle')
    
16.     difference (RegionOuter, RegionInner, RegionDifference1)
    
17.     erosion_circle (RegionDifference1, RegionErosion, 2.5)
    
18.     reduce_domain (Image, RegionErosion, ImageReduced)
    
19. 
    
20.     *检测线
    
21.     calculate_lines_gauss_parameters (3, 75, Sigma, Low, High)
    
22.     lines_gauss (ImageReduced, Lines, Sigma, Low, High, 'dark', 'true', 'bar-shaped', 'true')
    
23.     union_adjacent_contours_xld (Lines, UnionContours, 20, 1, 'attr_keep')
    
24.     union_collinear_contours_ext_xld (UnionContours, UnionContours1, 10, 1, 2, 0.1, 0, -1, 1, 1, 1, 1, 1, 0, 'attr_keep')
    
25.     select_contours_xld (UnionContours1, SelectedContours, 'contour_length', 50, 2000, -0.5, 0.5)
    
26.     dev_get_window (WindowHandle)
    
27.     dev_clear_window ()
    
28.     dev_display (Image)
    
29.     dev_display (SelectedContours)
    
30.     stop()
    
31. endfor

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动态阈值学到了

谢谢，借鉴下