主要算子：close_contours_xld
测试图片：
halcon代码：
read_image (Image, 'D:/Halcon-WorkSpaces/Test/Image/test24.png')threshold_sub_pix (Image, Border, 128)dev_clear_window ()dev_set_line_width (10)dev_display (Border)*闭合轮廓线close_contours_xld (Border, ClosedContours)
效果：
