注意看下面的8个点（绿色的小点），我们想由8个点拟合出一条直线。
拟合完成的直线
halcon代码如下：
read_image (Image, 'C:/Users/Administrator/Desktop/尺寸机/建模/395876G-3-HWR.bmp')
*dev_open_window(0, 0, 2000, 2000, 'black', WindowHandle)
dev_set_color('green')
gen_circle(Circle, 961.230590820313, 1743.00048828125, 2)
gen_circle(Circle, 960.800903320313, 1751.00048828125, 2)
gen_circle(Circle, 961.299621582031, 1759.00048828125, 2)
gen_circle(Circle, 963.189758300781, 1767.00048828125, 2)
gen_circle(Circle, 977.465209960938, 3285.00048828125, 2)
gen_circle(Circle, 976.851989746094, 3293.00048828125, 2)
gen_circle(Circle, 976.745056152344, 3301.00048828125, 2)
gen_circle(Circle, 975.584289550781, 3310.00048828125, 2)
gen_circle(Circle, 975.035400390625, 3318.00048828125, 2)
gen_contour_polygon_xld(Contour, [961.230590820313,960.800903320313,961.299621582031,963.189758300781,976.851989746094], [1743.00048828125,1751.00048828125,1759.00048828125,1767.00048828125,3285.00048828125])
fit_line_contour_xld(Contour, 'tukey', -1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)fit_line_contour_xld 算子最后取得了起点x,y，终点x,y等关键信息。
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作者：hackpig
来源：www.skcircle.com
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