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  • Halcon学习之条形码实时扫描

    dev_open_window(1,1,400,400,'blue',ThisHandle)
    create_bar_code_model([], [], BarCodeHandle)
    set_bar_code_param(BarCodeHandle,'element_size_max',8)
    set_bar_code_param(BarCodeHandle,'check_char','present')
    set_bar_code_param(BarCodeHandle,'persistence',1)
    set_bar_code_param(BarCodeHandle,'composite_code','none')
    set_bar_code_param(BarCodeHandle,'meas_thresh',0.1)
    set_bar_code_param(BarCodeHandle,'num_scanlines',10)
    set_bar_code_param(BarCodeHandle,'min_identical_scanlines',2)
    set_bar_code_param(BarCodeHandle,'max_diff_orient',10)
    set_bar_code_param(BarCodeHandle,'element_height_min',8)
    set_bar_code_param(BarCodeHandle,'stop_after_result_num',1)
    *read_image(img,'C:/Users/IBM_ADMIN/Desktop/Halcon/2.jpg')
    *get_image_size (img, Width, Height)
    *dev_set_window_extents (0, 0, Width-1, Height-1)
    *find_bar_code(img,SymbolRegions,BarCodeHandle,'auto',DecodedataStrings)
    *get_bar_code_result(BarCodeHandle,'all','decoded_types',DecodedDataTypes)
    *dev_close_window()
    * open computer camera
    open_framegrabber ('DirectShow', 1, 1, 0, 0, 0, 0, 'default', -1, 'gray', -1, 'default', 'default', '0', -1, -1, AcqHandle1)
    * open another USB camera
    *open_framegrabber ('DirectShow', 1, 1, 0, 0, 0, 0, 'default', -1, 'gray', -1, 'default', 'default', '1', -1, -1, AcqHandle1)
    condition := true
    set_window_param(ThisHandle,'background_color','gray')
    *grab_image_start(AcqHandle1,-1000)
    while(condition)    
        *grab_image_async(BarImage,AcqHandle1, -1000)
        grab_image (BarImage, AcqHandle1)
        find_bar_code(BarImage,SymbolRegions,BarCodeHandle,'auto',scannString)
        if(|scannString| >= 1)
            dev_display(BarImage)
            disp_message(ThisHandle,scannString,'window',12,12,'blue','false')
            disp_continue_message(ThisHandle,'black','true')
            stop()
            condition := false
        endif
    endwhile
    clear_all_bar_code_models()
    close_all_framegrabbers()
    dev_close_window()
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  • 原文地址:https://www.cnblogs.com/crazyghostvon/p/HalconBarCode.html
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