在C#中使用Tesseract

Question

我已经安装了测试服务器，我正在使用按钮点击来设置tesseract.exe文件的位置。我还使用了另一个单击按钮来设置图像文件的位置。现在，我想要点击第三个按钮，用tesseract处理图像，因为我已经存储了它们各自的位置。我正在使用一些基本的粗略方法，但它适合我。我的代码如下：

private void B8_Click(object sender, EventArgs e)
    {
        q = z + "\\" + "output.txt";
        if (k != null)
        {
            Process pr = new Process();
            pr.StartInfo.FileName = j;
            pr.StartInfo.Arguments =  k + " "  + q;
            pr.Start();
            pr.WaitForExit();
        }
        else
        {
            MessageBox.Show("No Image File Selected.");
        }
        var filetext = File.ReadAllText(q);
        tb5.Text = filetext;
        //File.Delete(q);
    }

    private void B10_Click(object sender, EventArgs e)
    {
        openFileDialog1 = new OpenFileDialog();
        DialogResult result = openFileDialog1.ShowDialog();
        if (result == DialogResult.OK)
        {
            j = "\"" + openFileDialog1.FileName + "\"";
            MessageBox.Show("Tesseract Location Set: " + j);


        }
    }

    private void B9_Click(object sender, EventArgs e)
    {
        openFileDialog1 = new OpenFileDialog();
        DialogResult result = openFileDialog1.ShowDialog();
        if (result == DialogResult.OK)
        {
            k = "\"" + openFileDialog1.FileName + "\"";
            MessageBox.Show("Image File Location Set: " + k);
        }
    }

到目前为止，我的三键点击故事：

我已经成功地使用1个按钮来设置tesseract.exe路径，用2个按钮来设置图像路径，但是3个按钮(参见B-8)有一个问题。它提取文本并存储到一个"output.txt“文件中。但是，我无法将此文本导入到我的textbox tb5中，然后销毁此文件。

我得到的错误是Exception thrown: 'System.IO.FileNotFoundException' in mscorlib.dll An unhandled exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll Could not find file 'C:\Users\ambij\Desktop\try\output.txt'.，我不明白这一点，但实际上output.txt文件驻留在文件夹中。

Answer 1

以下内容适用于Tesseract 3.05.02 -可在更高版本中使用

private void RunIt()
{
    string tessDataPath = yourTessDataPath; // Your Tesseract Location Set
    string imagePath = yourImagePath; // The Image File Location
    string theTextFromTheImage = DoOCR(yourTessDataPath, yourImagePath);
    // Some formatting may be required - OCR isn't perfect
    MessageBox.Show(theTextFromTheImage);
}

private string DoOCR(string tessdataPath, string filePath)
{
    string returnText = "";
    using (var engine = new TesseractEngine(tessdataPath, "eng", EngineMode.Default))
    {
        // engine.SetVariable("tessedit_char_whitelist", "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"); // Only regular letters
        string theVersion = engine.Version; // Optional, but useful
        using (var img = Pix.LoadFromFile(filePath))
        {
            using (var page = engine.Process(img))
            {
                returnText = page.GetText();

            }
        }
    }
    return returnText;
}