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