tesseract 체험

 

이미지 전처리 자료조사 중 재밌는넘을 발견해서 사용해봄 apache 2.0 license

 

opencv4와 tesseract4는 Nuget에서 

tessdata는 https://github.com/tesseract-ocr/tessdata

 

 

 

Bitmap bmp;
        
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string imgfile = string.Empty; OpenFileDialog dialog = new OpenFileDialog(); dialog.InitialDirectory = @"D:\"; if (dialog.ShowDialog() == DialogResult.OK) { imgfile = dialog.FileName; }
            try { bmp = new Bitmap(imgfile); pictureBox1.Image = bmp; } catch { }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Mat bmpMat = OpenCvSharp.Extensions.BitmapConverter.ToMat(bmp);
            Mat grayMat = bmpMat.Clone();

            Cv2.AdaptiveThreshold(bmpMat, grayMat, 255, AdaptiveThresholdTypes.GaussianC, ThresholdTypes.Binary, 55, 10);

            bmp = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(grayMat);
            pictureBox1.Image = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(grayMat);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Pix pix = PixConverter.ToPix(bmp); 
            var engine = new TesseractEngine(@"./tessdata-main", "eng", EngineMode.Default); 
            var result = engine.Process(pix); 
            textBox1.Text = result.GetText();

        }

        private void button4_Click(object sender, EventArgs e)
        {
            Mat bmpMat = OpenCvSharp.Extensions.BitmapConverter.ToMat(bmp);
            Mat binaryMat = bmpMat.Clone();
            Cv2.CvtColor(bmpMat, binaryMat, ColorConversionCodes.BGR2GRAY);

            pictureBox1.Image = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(binaryMat);
            bmp = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(binaryMat);
        }