实例二：长度和角度测量
素材图片：
halcon代码：
1: *读取并截取图片
2: dev_close_window()
3: read_image (Image, 'D:/MyFile/halcon/长度和角度测量/图.png')
4: crop_rectangle1 (Image, ImagePart, 75, 0, 400, 400)
5: get_image_size (ImagePart, Width, Height)
6: dev_open_window (0, 0, Width, Height, 'black', WindowHandle)
7: dev_display (ImagePart)
8:
9: *获取图形的边界
10: threshold (ImagePart, Regions, 0, 112)
11:
12: *分离三角形和圆形
13: connection(Regions,ConnectedRegions)
14: sort_region(ConnectedRegions,SortedRegions,'upper_left','true','column')
15: select_obj(SortedRegions,Circle,1)
16: select_obj(SortedRegions,Triangle,2)
17:
18: *获取三角形各边的信息
19: skeleton(Triangle,TriangleSkeleton)
20: gen_contours_skeleton_xld(TriangleSkeleton,TriangleContours,1,'filter')
21: segment_contours_xld(TriangleContours,ContoursSplit,'lines_circles', 5, 4, 2)
22: select_contours_xld(ContoursSplit,SelectedContours, 'contour_length',100, 999, -0.5, 0.5)
23: fit_line_contour_xld (SelectedContours, 'tukey', -1, 10, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)
24:
25: *计算三角形角度
26: angle_ll (RowBegin[0], ColBegin[0], RowEnd[0], ColEnd[0], RowBegin[1], ColBegin[1], RowEnd[1], ColEnd[1], Angle1)
27: angle_ll (RowBegin[0], ColBegin[0], RowEnd[0], ColEnd[0], RowBegin[2], ColBegin[2], RowEnd[2], ColEnd[2], Angle2)
28: angle_ll (RowBegin[1], ColBegin[1], RowEnd[1], ColEnd[1], RowBegin[2], ColBegin[2], RowEnd[2], ColEnd[2], Angle3)
29: Angle1:=abs(deg(Angle1))
30: Angle2:=abs(deg(Angle2))
31: Angle3:=abs(deg(Angle3))
32:
33: *获取圆的信息
34: area_center(Circle,AreaCircle, RowCircle, ColumnCircle)
35:
36: *计算圆心到三角形各边的距离
37: Distance := []
38: for Index := 0 to 2 by 1
39: distance_pl (RowCircle, ColumnCircle, RowBegin[Index], ColBegin[Index], RowEnd[Index], ColEnd[Index], ThisDistance)
40: Distance := [Distance,ThisDistance]
41: endfor