halcon实现二维码识别

pen_framegrabber ('GigEVision', 0, 0, 0, 0, 0, 0, 'default', -1, 'default', -1, 'false', 'default', '00111cf13411_Microview_RSA5001GM14', 0, -1, AcqHandle)
* grab_image_start (AcqHandle, -1)
while (true)
*     grab_image_async (Image, AcqHandle, -1)
    grab_image (Image, AcqHandle)
    * Image Acquisition 01: Do something
    * Read the symbol in the image
*     find_data_code_2d (Image, SymbolXLDs, DataCodeHandle, [], [], \
                   ResultHandles, DecodedDataStrings)
    find_data_code_2d (Image, SymbolXLDs, DataCodeHandle, 'stop_after_result_num', 12, \
                   ResultHandles, DecodedDataStrings)
    * Display the results
    dev_display (Image)
*     dev_get_window(WindowHandle)
    * Get the num of detected QR codes
    count_obj(SymbolXLDs,NUM)