这种颗粒怎么提取边缘轮廓

之前在论坛求助大神学了识别测量颗粒的长径和短径，但是精度不好，用分水岭算子分割效果也不好，觉得可能是轮廓提取的不好，于是研究了几天轮廓提取，下面是我的提取代码，做到reduce抠图这步就错了，请问大神怎么解决啊，顺便问问正确的分割粘连颗粒算法怎么解决？？？

1. dev_update_off ()
   
2. read_image (Image, 'D:/HalconCase/ExerciseImage/10861086.bmp')
   
3. dev_close_window ()
   
4. get_image_size (Image, Width, Height)
   
5. dev_open_window(0, 0, Width, Height, 'black', WindowHandle)
   
6. dev_display(Image)
   
7. dev_set_part (0, 0, Height - 1, Width - 1)
   
8. dev_set_color('white')
   
9. dev_set_colored(12)
   
10. dev_set_draw('margin')
    
11. stop()
    
12. gauss_filter (Image, ImageGauss, 5)
    
13. scale_image (ImageGauss, ImageScaled, 2, 0)
    
14. * threshold (ImageScaled, Regions, 40, 128)
    
15. * connection (Regions, Connection)
    
16. 
    
17. ************
    
18. binary_threshold (ImageScaled, Region, 'max_separability', 'dark', UsedThreshold)
    
19. connection (Region, ConnectedRegions)
    
20. fill_up (ConnectedRegions, RegionFillUp1)
    
21. *****
    
22. dilation_circle (RegionFillUp1, RegionDilation, 10.5)
    
23. erosion_circle (RegionDilation, RegionErosion, 6.5)
    
24. dev_display (RegionErosion)
    
25. dev_display (RegionDilation)
    
26. difference (RegionDilation, RegionErosion, RegionDifference)
    
27. reduce_domain (Image, RegionDifference, ImageReduced)
    
28. stop（）

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