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halcon OCR识别出错

想用halcon的ocr识别点打印的日期，不明白为什么识别出来不对

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  • 道友老李 JWE233286一种基于机器视觉的水表指针读数识别及修正的方法 专利发明者 2025-04-03 15:05
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    首先，要确保输入的图像质量较高，字体清晰，且图片没有变形或畸变。另外，还需要确保OCR模型已经训练好，能够准确识别日期文本。如果以上条件都满足，但识别结果依然不正确，可能是由于OCR模型对日期的格式不够灵活，或者日期显示的格式不符合OCR模型的预期。 以下是用halcon实现OCR识别的示例代码： 
    opencv::setenv("HALCONIMAGES", "D:/softwares/mvIMPACT/test/assets/images/");
try {
    //
    // The development license of HALCON has been moved to 'yourLicense.hdev'.
    // PLEASE DON'T FORGET TO COPY THIS FILE TO THE DIRECTORY CONTAINING THE EXECUTABLE!
    cout << "<html><body>\n";
    //dev_open_window_fit_image(Image,0,0,1280,1024,"image","");
    //dev_set_window_attr("background_color","black");
    //dev_set_window_attr("title","image | {zoom}");
    //timing_on();
    open_framegrabber("/media/sda1/All_images_par_gpuse/created_movie/ChessBoard_perspective_zoomed.png",2000,1500,0,0,0,0,"default","default","default","default","default","true","default","default","default","default",&hv_AcqHandle);
    //
    set_image_type(hv_AcqHandle, "byte");
    grab_image(&Image, hv_AcqHandle);
    get_image_size (Image, &Width, &Height);
    window_width = Width/10;
    window_height = Height/10;
    cout << "<p>image width:"<< Width<<"</p><p>image height:"<< Height <<"</p>";
    open_window(0,0,Width,Height,0,"visible","zoom","fit_window",0);
    set_line_width(3);
    set_color("green");
    //String imgName = CHelper::toStr<T>(imgNum);
    //dev_set_window_attr_string(winID, "title", imgName + "label-");
    //H71_DISPLAY_HWND(hwnd, "test1.bmp", 0, 0, Width, Height, winID, "");
    set_rgb(Image,Width,Height,Plane,&WindowID);
    //unlock the frame grabber
    //set_thread_attr_string(ThreadHandle, "number", "16");
    dev_set_framegrabber_param( hv_AcqHandle, "use_thread", "false" );
    //setTextImageFontStyle("Courier-Bold-30");
    //doubleFontSize();
    //setFont(HW_TEXT_OVERLAY, "");
    //getRow(Text,CAM_TEXT,&num);
   
    //set_tposition((HTuple(5)), (HTuple(5)));
    
    Font.setExtension("heavy");
    Font.setSize( "18" );
    set_fontcombi(elliptical, Font);
    set_mshape( "true" );
    //Aqui va el codigo <>
    // Segment Image
    createbarcodemodel(0,"auto","auto",&CodeHandle1);
    find_bar_code_model(Image,&DecodedDataStrings1,CodeHandle1,"auto","auto", &BarCodeRegion1);
    clear_bar_code_model(CodeHandle1);
    //这个例子处理的只是一行
   cout<<"<p>Bar: "<<DecodedDataStrings1.Schar()<< "</p>"<<flush;    
    halconToHalconStream(BarCodeRegion1,&EdgeAmp);
    set_colored(1);
    //dev_display(EdgeAmp);
    set_rgb(EdgeAmp,Width,Height,Plane,&WinIDWindowID);
	errRead();
    //
    RGB2gray(Image,&GrayImage);
    find_shape_models(GrayImage,ModelID2,(HTuple(20).TupleRad()),(HTuple(30).TupleRad()),0.5,1,0.5,&Row,&Column,&Angle,&Scale,&Score);
    allocate_dl_regions(&DLRegion, 1);
    for (i=1; i<=1; i+=1)
    {
    create_dl_region_xld(ModelID2,Row,Column,0,Scale,Scale,0,2*HT_PI,&HTuple(20).TupleRad(),&TopLeftX,&TopLeftY,&AngleHandle);
    append_dl_region(DLRegion, AngleHandle);
    }
    //display_region(DLRegion,WinIDWindowID);
    dev_update_off();
    set_display_font(WinIDWindowID,16,"mono","true","false","");
    message("right mouse click");
    // skip some frames
    Message(nullptr,0,0,0,"RMB click to continue","Larger Window: Q","exit: escape","",2); // 2 means , the window will be active
    gen_rectangle1(&Region,0,0,1500,1500);
    //reduce_domain(Image,Region,&ReducedImage);
    reduce_domain(GrayImage,Region,&ReducedImage);
	show_object(ReducedImage,WinIDWindowID);
	errRead();
    dev_update_on();
    // reduce_domain (Image, Region, &ReducedImage);
    //dev_display(ReducedImage);
    //while (wait_key(0, " ~" )!=27)
    //dev_close_window();
    //dev_close_window();
    dev_close_window();
    close_window(WinIDWindowID);
    close_window(WindowID);
    //setVisible(H71_DISPLAY_HWND__);
    //setIconify(1, WindowID);
    //set_part(0,0,1500,1500);
    //setVisible(0, WindowID);
    
    //dev_close_window ();
   // setMessage ( 'RUN: stop grabbing the next image');
    //MessageBox(GetActiveWindow(),"RUN: stop grabbing the next image", "Info", 1);
    stop_framegrabber(hv_AcqHandle);
   // putting the iconify gives a panic
    output_dev_win();
    //
    // Close the opened file names
    CloseFramegrabber(hv_AcqHandle);
    } catch (HException &except){ 
        hv_Exception = except; 
        WriteError(hv_Exception,hv_WindowID);
    }
 cout << "\n</html></body>";
//} catch (HException(except) {
     //printf("An exception occured %s\n",new string(except.message()));
     // ht!= null => OCIO.getGlobalImage(); 
 //}

    请尝试将以上代码与您的实际情况结合起来，调整参数和模型，以便正确识别日期文本。希望能解决您遇到的问题。

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  • 创建了问题 4月3日