如何在visual studio 2013中阅读tiff图像（Tesseract OCR）？

Question

我计划在Visual Studio窗口或Web应用程序中使用Tesseract OCR来读取tiff / pdf图像。我尝试下面的代码，但手写tiff图像无法正常阅读，我有垃圾字符。 我的最终目标是选择或不选择问题4,5,6,7A，7B，7C，7D，7E，7F以及评论是什么（参考我的样本tiff）。

请建议如何阅读。 代码使用了：

引用dll c：\ Samples \ packages \ Tesseract.2.3.0.0 \ lib \ net40 \ Tesseract.dll

WebForm1.aspx.cs中

protected void submitFile_ServerClick(object sender, EventArgs e)
{
    if (imageFile.PostedFile != null && imageFile.PostedFile.ContentLength > 0)
    {
        // for now just fail hard if there's any error however in a propper app I would expect a full demo.

        using (var engine = new TesseractEngine(Server.MapPath(@"~/tessdata"), "eng", EngineMode.Default))
        {
            // have to load Pix via a bitmap since Pix doesn't support loading a stream.
            using (var image = new System.Drawing.Bitmap(imageFile.PostedFile.InputStream))
            {
                using (var pix = PixConverter.ToPix(image))
                {
                    using (var page = engine.Process(pix))
                    {
                        meanConfidenceLabel.InnerText = String.Format("{0:P}", page.GetMeanConfidence());
                        resultText.InnerText = page.GetText();
                    }
                }
            }
        }
        inputPanel.Visible = false;
        resultPanel.Visible = true;
    }
}

protected void restartButton_ServerClick(object sender, EventArgs e)
{
    resultPanel.Visible = false;
    inputPanel.Visible = true;
}