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*读入图片

read_image (Image, 'cicle.bmp')

*计算图片大小，并以原图尺寸显示

get_image_size (Image, Width, Height)

dev_close_window ()

dev_open_window_fit_size (0, 0, Width, Width, -1, -1, WindowHandle)

dev_display (Image)

*01. 设置ROI感兴趣区域

gen_circle (ROI, 257.633, 324.833, 187.017)

* gen_rectangle1 (ROI, 50, 50, 470, 470)

reduce_domain (Image, ROI, ImageReduced)

*02. 二值化处理，并打散连接区域,选取目标区域

threshold (ImageReduced, Regions, 23, 255)

connection (Regions, ConnectedRegions)

select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 57706.4, 86146.8)

*03. 将目标区域进行膨胀处理

dilation_circle (SelectedRegions, RegionDilation, 10)

*04. 将目标区域进行腐蚀处理

erosion_circle (SelectedRegions, RegionErosion, 4)

*填充孔洞

fill_up (RegionErosion, RegionFillUp)

*05. 将膨胀后的区域和腐蚀后的区域进行减操作，并进行抠图处理，目的为了得到有边缘的真实图像

difference (RegionDilation, RegionFillUp, RegionDifference)

union1 (RegionDifference, RegionUnion)

reduce_domain (ImageReduced, RegionUnion, ImageReduced1)

*06. 使用canny算子提取亚像素轮廓

edges_sub_pix (ImageReduced1, Edges, 'canny', 1, 20, 40)

*07. 根据得到的真实边缘，进步处理和计算所需的线、弧、圆等

segment_contours_xld (Edges, ContoursSplit, 'lines_circles', 5, 4, 2)

select_contours_xld (ContoursSplit, SelectedContours, 'contour_length', 8, 1000, -0.5, 0.5)

union_adjacent_contours_xld (SelectedContours, UnionContours3, 10, 1, 'attr_keep')

fit_circle_contour_xld (UnionContours3, 'algebraic', -1, 0, 0, 3, 2, Row1, Column1, Radius1, StartPhi, EndPhi, PointOrder)

gen_circle (Circle, Row1, Column1, Radius1)

*显示结果

dev_set_line_width (2)

dev_set_draw ('margin')

dev_display (Image)

dev_display (Circle)