c# - Tesseract Init() 方法 C3

Question

我在 C# .net 4.5 中使用 Tesseract 2每当代码到达 OCR.InIt() 方法时，它就会退出代码并且程序停止执行。即使是 Catch block 也不保存代码。请让我知道如何检查问题。

Bitmap image = new Bitmap(ofd_OpenPhoto.FileName);
tessnet2.Tesseract ocr = new tessnet2.Tesseract();
ocr.Init("C:\\tessnet2\\tesseract-ocr\\tessdata", "eng", false);

请告诉我，如何使用 Init() 方法，我应该删除 null 吗？

private void btn_Browse_Click(object sender, EventArgs e)
        {
            ofd_OpenPhoto.Multiselect = false;
            ofd_OpenPhoto.RestoreDirectory = true;
            ofd_OpenPhoto.SupportMultiDottedExtensions = false;
            ofd_OpenPhoto.FileName = "";
            ofd_OpenPhoto.Title = "Select Photo";
            ofd_OpenPhoto.Filter = "Photo Files (*.jpg)|*.jpg";

            DialogResult result = ofd_OpenPhoto.ShowDialog();

            if (result == System.Windows.Forms.DialogResult.OK)
            {
                string file_name;
                if (ofd_OpenPhoto.FileName != null)
                {
                    try
                    {
                        file_name = ofd_OpenPhoto.FileName.Substring(ofd_OpenPhoto.FileName.LastIndexOf("\\") + 1);
                        txt_PhotoPath.Text = file_name.Substring(0, file_name.LastIndexOf("."));

                        Emgu.CV.Image<Bgr, Byte> img_o = new Emgu.CV.Image<Bgr, byte>(ofd_OpenPhoto.FileName);
                        pb_PhotoViewer_O.Image = img_o.ToBitmap();
                        if (pb_PhotoViewer_O.Image != null)
                        {
                            try
                            {
                                Bitmap image = new Bitmap(ofd_OpenPhoto.FileName);
                                tessnet2.Tesseract ocr = new tessnet2.Tesseract();
                                ocr.SetVariable("tessedit_char_whitelist", "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
                                ocr.Init(@"C:\\Program Files (x86)\\Tesseract-OCR", "eng", false);
                                List<tessnet2.Word> result1 = ocr.DoOCR(image, Rectangle.Empty);
                                txt_ExtractedNumber.Text = result1.ToString();
                            }
                            catch (Exception ex)
                            {

                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        //e.Message();
                    }
                }
            }
        }

这是我的代码。谢谢。

Answer 1

如果你写ocr.Init("C:\\tessnet2\\tesseract-ocr\\tessdata", "eng", false);然后在 C:\tessnet2\tesseract-ocr\tessdata 目录下你必须有下一个文件:

• eng.DangAmbigs
• eng.freq-dawg
• eng.inttemp
• eng.normproto
• eng.pffmtable
• eng.unicharset
• eng.user-words
• eng.word-dawg

您还必须检查是否删除了 Windows 系统环境变量 (TESSDATA_PREFIX)