【Halcon】角度测量

如图，测量红框中的角度，代码如下：

*读取并截取图片
   dev_close_window()
   read_image (Image, 'C://Users//Administrator//Desktop//1测试图.jpg')
   get_image_size (Image, Width, Height)
   dev_open_window (0, 0, Width, Height, 'black', WindowHandle)
   dev_display (Image)
   
   *获取图形的边界
   draw_rectangle1 (WindowHandle, Row1, Column1, Row2, Column2)
   gen_rectangle1 (Rectangle, Row1, Column1, Row2, Column2)
   
   reduce_domain (Image, Rectangle, ImageReduced)
   
   threshold (ImageReduced, Regions, 80, 255)
   *threshold (ImageReduced, Regions, 0, 112)
      
   *获取三角形各边的信息
   skeleton(Regions,TriangleSkeleton)
   gen_contours_skeleton_xld(TriangleSkeleton,TriangleContours,1,'filter')
   segment_contours_xld(TriangleContours,ContoursSplit,'lines_circles', 5, 4, 2)
   select_contours_xld(ContoursSplit,SelectedContours, 'contour_length',20, 999, -0.5, 0.5)
   fit_line_contour_xld (SelectedContours, 'tukey', -1, 10, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)
   
   *计算三角形角度
   angle_ll (RowBegin[0], ColBegin[0], RowEnd[1], ColEnd[1], RowBegin[0], ColBegin[0], RowEnd[2], ColEnd[2], Angle1)
   Angle1:=abs(deg(Angle1)) 

参考：https://www.cnblogs.com/hanzhaoxin/archive/2013/02/12/2910338.html