如何获取网格亚像素角点

这个是理想图，实际比这个要难提取一些。
左图为任意画的网格（原图），需要自动提取类似右边（效果图）的亚像素角点坐标，试过模板，sobel等效果都不是很好，而且复杂（这也不是鞍点）。
有没有大佬写过类似的算法的？

目前初步解决，后续再优化算法

怎么处理的

Princess 发表于 2023-1-5 15:46
目前初步解决，后续再优化算法

楼主怎么做到的，能不能给个程序学习一下。

Halcon 提供了角点检测的算子

1. read_image (Image, 'C:/Users/Administrator/Desktop/无标题.jpg')
   
2. gen_rectangle1 (ROI_0, 15.3253, 8.60566, 347.871, 336.718)
   
3. reduce_domain (Image, ROI_0, ImageReduced)
   
4. lines_gauss (ImageReduced, Lines, 2.5, 8, 11, 'dark', 'true', 'bar-shaped', 'true')
   
5. segment_contours_xld (Lines, ContoursSplit, 'lines', 5, 4, 2)
   
6. select_shape_xld (ContoursSplit, SelectedXLD, 'rect2_phi', 'and', -0.5, 0.5)
   
7. union_adjacent_contours_xld (SelectedXLD, UnionContours, 10, 1, 'attr_keep')
   
8. fit_line_contour_xld (UnionContours, 'tukey', -1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)
   
9. select_shape_xld (ContoursSplit, SelectedXLD2, ['rect2_phi','rect2_phi'], 'or', [-1.7,1.4], [-1.4,1.7])
   
10. union_adjacent_contours_xld (SelectedXLD2, UnionContours2, 10, 1, 'attr_keep')
    
11. fit_line_contour_xld (UnionContours2, 'tukey', -1, 0, 5, 2, RowBegin1, ColBegin1, RowEnd1, ColEnd1, Nr1, Nc1, Dist1)
    
12. rows:=[]
    
13. cols:=[]
    
14. for Index := 0 to |RowBegin|-1 by 1
    
15.     for Index1 := 0 to |RowBegin1|-1 by 1
    
16.        intersection_lines (RowBegin[Index], ColBegin[Index], RowEnd[Index], ColEnd[Index], RowBegin1[Index1], ColBegin1[Index1], RowEnd1[Index1], ColEnd1[Index1], Row, Column, IsOverlapping)
    
17.        rows:=[rows,Row]
    
18.        cols:=[cols,Column]
    
19.     endfor
    
20. endfor
    
21. gen_cross_contour_xld (Cross, rows, cols, 36, 0.785398)

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学习了，大佬🐂

1. read_image (Image11, 'C:/Users/86131/Desktop/11.jpg')
   
2. gen_rectangle1 (ROI_0, 12.9085, 14.923, 347.091, 331.795)
   
3. reduce_domain (Image11, ROI_0, ImageReduced)
   
4. crop_domain (ImageReduced, ImagePart)
   
5. rgb1_to_gray (ImagePart, GrayImage)
   
6. threshold (GrayImage, Region, 0, 10)
   
7. opening_rectangle1 (Region, RegionOpening, 10, 1)
   
8. opening_rectangle1 (Region, RegionOpening1, 1, 10)
   
9. intersection (RegionOpening, RegionOpening1, RegionIntersection)
   
10. connection (RegionIntersection, ConnectedRegions)
    
11. area_center (ConnectedRegions, Area, Row, Column)
    
12. gen_cross_contour_xld (Cross, Row, Column, 20, 0.785398)

复制代码

hanlin9523 发表于 2024-3-19 20:45
read_image (Image11, 'C:/Users/86131/Desktop/11.jpg')
gen_rectangle1 (ROI_0, 12.9085, 14.923, 347.09 ...

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