上位机工业视觉识别激光打印的二维码 - 工控编程吧

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激光打印后，其打印结果可以通过视觉识别与读取
上面图片的二维码是Data Matrix ECC 200类型，几行代码就可以识别出来
代码如下

read_image (Image, '1.bmp')
dev_close_window ()
dev_open_window_fit_image (Image, 0, 0, -1, -1, WindowHandle)
dev_display (Image)
SymbolType := []
SymbolType := [SymbolType,'QR Code']
SymbolType := [SymbolType,'Micro QR Code']
SymbolType := [SymbolType,'PDF417']
SymbolType := [SymbolType,'Aztec Code']
SymbolType := [SymbolType,'Data Matrix ECC 200']
create_data_code_2d_model (SymbolType[4], 'default_parameters', 'standard_recognition', DataCodeHandleStandard)
find_data_code_2d (Image, SymbolXLDs, DataCodeHandleStandard, [], [], ResultHandles, DecodedDataStrings)
clear_data_code_2d_model (DataCodeHandleStandard)
dev_display (Image)
if(|DecodedDataStrings|)
get_string_extents (WindowHandle, 'test_string', Ascent, Descent, Width, Height)
area_center_xld (SymbolXLDs, Area, Row, Column, PointOrder)
dev_disp_text (DecodedDataStrings, 'window', 'top', 'left', 'black', [], [])
dev_display (SymbolXLDs)
endif

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