csharp: Emgu.CV.OCR and Tesseract.OCR Optical Character Recognition

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using Emgu.CV;  //3.2.02 using Emgu.CV.VideoStab; using Emgu.CV.ML; using Emgu.CV.OCR; using Emgu.CV.Structure; //https://github.com/iobrains/OpenCV     namespace CharacterRecognition {       /// <summary>     /// geovindu edit     /// </summary>     public partial class MainWnd : Form     {         string path;         public MainWnd()         {             InitializeComponent();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void loadImageToolStripMenuItem_Click(object sender, EventArgs e)         {             rtbOcrResult.Clear();               OpenFileDialog ofd = new OpenFileDialog();             ofd.Title = "Select an image";             ofd.Filter = "Image Files(*.png; *.jpg; *.bmp; *.gif)|*.png; *.jpg; *.bmp; *.gif";             if (ofd.ShowDialog() == DialogResult.OK)             {                 path = System.IO.Path.GetFullPath(ofd.FileName);                 picBox.Image = new Bitmap(path);                 picBox.SizeMode = PictureBoxSizeMode.Zoom;                 statusLabelOCR.Text = path + " loaded.";             }         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void exitToolStripMenuItem_Click(object sender, EventArgs e)         {             Close();         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void btnAnalyzeImage_Click(object sender, EventArgs e)         {             if(picBox.Image == null)             {                 MessageBox.Show("Load an image first!");             }             else             {                 statusLabelOCR.Text = "Analyzing invoice image...";                 Task.Run(() =>                 {                     using (var img = new Image<Bgr, byte>(path))                     {                         //https://github.com/tesseract-ocr/tessdata/                         //Environment.GetEnvironmentVariable("EMGU_ROOT") +                         string tessdata = @"D:\open source\face\tessdata";                         using (var ocrProvider = new Tesseract(tessdata, "eng", OcrEngineMode.TesseractOnly))  //TesseractCubeCombined                         {                             ocrProvider.SetImage(img); //Recognize                             string text = ocrProvider.GetUTF8Text().TrimEnd(); //GetText                             rtbOcrResult.Invoke((MethodInvoker)delegate                                                {                                                    statusLabelOCR.Text = "Analysis completed.";                                                    rtbOcrResult.AppendText(text);                                                });                                                       }                     }                 });                               }         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void MainWnd_Load(object sender, EventArgs e)         {           }     } }