滤波核选择测试，记录一下

1. *测试目标图形: 小图形约20x20, 大图形约40x40
   
2. read_image (Image, '滤波核测试.png')
   
3. rgb1_to_gray (Image, GrayImage)
   
4. 
   
5. *默认滤波核小于目标, 筛选到目标有孔洞, 结构不完整
   
6. mean_image (GrayImage, ImageMean, 9, 9)     //*滤波后目标灰度113 - 176
   
7. dyn_threshold (GrayImage, ImageMean, RegionDynThresh, 5, 'dark')
   
8. connection (RegionDynThresh, ConnectedRegions)
   
9. region_features (ConnectedRegions, 'width', Value)
   
10. 
    
11. *滤波核未超过目标宽度, 小图形筛选正常, 小矩形有孔洞, 结构不完整
    
12. mean_image (GrayImage, ImageMean0, 19, 19)  //*滤波后目标灰度121 - 184
    
13. dyn_threshold (GrayImage, ImageMean0, RegionDynThresh0, 5, 'dark')
    
14. connection (RegionDynThresh0, ConnectedRegions0)
    
15. region_features (ConnectedRegions0, 'width', Value0)
    
16. 
    
17. *小图形筛选正常, 大图形筛选有孔洞, 结构不完整
    
18. mean_image (GrayImage, ImageMean1, 21, 21)  //*滤波后目标灰度121 - 185
    
19. dyn_threshold (GrayImage, ImageMean1, RegionDynThresh1, 5, 'dark')
    
20. connection (RegionDynThresh1, ConnectedRegions1)
    
21. region_features (ConnectedRegions1, 'width', Value1)
    
22. 
    
23. *小图形筛选正常, 大矩形筛选有孔洞, 结构不完整
    
24. mean_image (GrayImage, ImageMean2, 39, 39)  //*滤波后目标灰度166 - 187
    
25. dyn_threshold (GrayImage, ImageMean2, RegionDynThresh2, 5, 'dark')
    
26. connection (RegionDynThresh2, ConnectedRegions2)
    
27. region_features (ConnectedRegions2, 'width', Value2)
    
28. 
    
29. *小图形筛选正常, 大图形筛选正常: 最大目标宽度
    
30. mean_image (GrayImage, ImageMean3, 41, 41)  //*滤波后目标灰度188 - 191
    
31. dyn_threshold (GrayImage, ImageMean3, RegionDynThresh3, 5, 'dark')
    
32. connection (RegionDynThresh3, ConnectedRegions3)
    
33. region_features (ConnectedRegions3, 'width', Value3)
    
34. 
    
35. *小图形筛选正常, 大图形筛选正常: 2倍最大目标宽度
    
36. mean_image (GrayImage, ImageMean4, 81, 81)  //*滤波后目标灰度222 - 237, 图形内基本一致
    
37. dyn_threshold (GrayImage, ImageMean4, RegionDynThresh4, 5, 'dark')
    
38. connection (RegionDynThresh4, ConnectedRegions4)
    
39. region_features (ConnectedRegions4, 'width', Value4)
    
40. 
    
41. *小图形筛选正常, 大图形筛选正常:
    
42. mean_image (GrayImage, ImageMean5, 301, 301)  //*滤波后目标灰度240, 图形内基本一致
    
43. dyn_threshold (GrayImage, ImageMean5, RegionDynThresh5, 5, 'dark')
    
44. connection (RegionDynThresh5, ConnectedRegions5)
    
45. region_features (ConnectedRegions5, 'width', Value5)
    
46. 
    
47. 
    
48. *所以滤波核选择时应该参照最大待筛选目标, 不能小于目标宽度, 考虑效率可使用(2x目标宽度+1)

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滤波核越大，处理出来的效果越明显，学到了