Halcon 10.0:Sample 分割邊緣擬合圓Circles.hdev

處理流程：快速二值化（區域）->獲取區域邊緣->截取邊緣->膨脹邊緣區域（定位）->定位區域進行邊緣檢測->邊緣分割：線和圓->選擇屬性爲圓的弧->擬合圓

 

*讀取圖像
read_image (Image, 'double_circle')
dev_close_window ()
get_image_size (Image, Width, Height)
dev_open_window (0, 0, Width, Height, 'black', WindowHandle)
*快速二值化
fast_threshold (Image, Region, 0, 120, 7)
*取region的邊界
boundary (Region, RegionBorder, 'inner')
*剪切、膨脹定位弧形區域
clip_region_rel (RegionBorder, RegionClipped, 5, 5, 5, 5)
dilation_circle (RegionClipped, RegionDilation, 2.5)
reduce_domain (Image, RegionDilation, ImageReduced)
*在弧形區域進行邊緣檢測
edges_sub_pix (ImageReduced, Edges, 'lanser2', 0.5, 40, 60)
*分割邊緣：線和圓
segment_contours_xld (Edges, ContoursSplit, 'lines_circles', 5, 4, 3)
count_obj (ContoursSplit, Number)
dev_display (Image)
dev_set_draw ('margin')
dev_set_color ('white')
dev_update_window ('off')
for i := 1 to Number by 1
    *選擇輪廓並根據特性肯定是否擬合圓：* Attrib = -1 線段 0 橢圓 1圓
    select_obj (ContoursSplit, ObjectSelected, i)
    get_contour_global_attrib_xld (ObjectSelected, 'cont_approx', Attrib)
    if (Attrib > 0)
        *逼近結果生成一個圓輪廓
        fit_circle_contour_xld (ObjectSelected, 'ahuber', -1, 2, 0, 3, 2, Row, Column, Radius, StartPhi, EndPhi, PointOrder)
        gen_circle_contour_xld (ContCircle, Row, Column, Radius, 0, rad(360), 'positive', 1.0)
        dev_display (ContCircle)
    endif
endfor
dev_set_colored (12)
dev_set_line_width (3)
dev_display (ContoursSplit)