dev_set_draw ('margin')
//不加这句，disp_message显示中文会乱码
set_system ('filename_encoding', 'utf8')
//创建model
create_data_code_2d_model ('QR Code', [], [], DataCodeHandle)
set_data_code_2d_param (DataCodeHandle, 'polarity', 'light_on_dark')
//加载二维码图片
read_image (Image,path)
//识别
find_data_code_2d (Image, SymbolXLDs, DataCodeHandle, 'train', 'all', ResultHandles, DecodedDataStrings)
//框选二维码
dev_display (SymbolXLDs)
//显示二维码信息
disp_message (200000, DecodedDataStrings, 'window', 20, 20, 'red', 'false')
//消除句柄
clear_data_code_2d_model (DataCodeHandle)