提取图中的二维码标签纸的轮廓

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怎样提取图中的二维码标签纸的轮廓及面积与坐标

图片：二维码2.jpg

图片：QQ图片C.png

read_image (Image, 'C:/Users/Administrator/Desktop/halcon/二维码提取.jpg') 
mean_image (Image, ImageMean, 15, 15) 
get_image_size (Image, Width, Height) 
dyn_threshold (Image, ImageMean, RegionDynThresh, 5, 'light') 
connection (RegionDynThresh, ConnectedRegions) 
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 28733.1, 31065) 
fill_up (SelectedRegions, RegionFillUp) 
area_center (RegionFillUp, Area, Row, Column) 
stop () 
dev_clear_window () 
dev_open_window (0, 0, Width, Height, 'black', WindowHandle) 
reduce_domain (Image, RegionFillUp, ImageReduced) 
dev_display (ImageReduced) 
disp_message (WindowHandle, '面积是：'+Area, 'Image', Row-20, Column, 'black', 'true') 
disp_message (WindowHandle, '中心坐标是：'+Row+','+Column, 'Image', Row, Column, 'black', 'true')