halcon通过点拟合圆形，鼠标选点

原图

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源码

read_image (Image, '0.bmp')
dev_clear_window ()
dev_open_window_fit_image (Image, 0, 0, -1, -1, WindowHandle)
dev_display (Image)binary_threshold (Image, Region, 'max_separability', 'dark', UsedThreshold)
connection (Region, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 100, 100000)gen_empty_obj (CircleRegion)
PointNumber:=0
while (PointNumber<8)draw_point (WindowHandle, Row, Column)gen_region_points (Region1, Row, Column)select_shape_proto (SelectedRegions, Region1, SelectedRegions1, 'overlaps_abs', 1, 5)count_obj (SelectedRegions1, Number)if(Number>0)concat_obj (CircleRegion, SelectedRegions1, CircleRegion)PointNumber:=PointNumber+1endif   
endwhilesmallest_circle (CircleRegion, Row1, Column1, Radius)pts_to_best_circle (Circle, Row1, Column1, RowCenter, ColCenter, Radius)dev_display (Image)dev_display (Circle)

pts_to_best_circle 函数

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RowCenter := 0
ColCenter := 0
Radius := 0gen_empty_obj (Circle)
tuple_length(Cols, Length)if (Length>2)gen_contour_polygon_xld(Contour, Rows, Cols)fit_circle_contour_xld (Contour, 'geotukey', -1, 0, 0, 3, 2, RowCenter, ColCenter, Radius, StartPhi, EndPhi, PointOrder)tuple_length(StartPhi, Length1)if(Length1<1)return()endifgen_circle_contour_xld(Circle, RowCenter, ColCenter, Radius, StartPhi, EndPhi, PointOrder, 1)endif
return ()