ASP.NET MVC中的Tesseract OCR

Question

I am trying to implement Tesseract OCR in my project. I've got two projects in my solution:

• Portal - which is ASP.NET MVC App
• OCR - which is a class library, where I have Tesseract

In OCR class library, I have method:

using (var ocrEngine = new TesseractEngine(/*WHAT DOES COME HERE?*/, "eng", EngineMode.Default))
            {

                using (var pix = PixConverter.ToPix(new Bitmap(imageFilePath)))
                {
                    using (var page = ocrEngine.Process(pix))
                    {
                        output = page.GetText();
                    }
                }
            }

In my project I have folder tessdata , but I don't know how to reference it, to make everything work. I tried:

@"./tessdata"

or

System.Web.Hosting.HostingEnvironment.MapPath("~/tessdata")

but none of them worked.

Answer 1

I use Server.MapPath and the demo works fine.

    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(file.InputStream))
        {
            using (var pix = PixConverter.ToPix(image))
            {

                using (var page = engine.Process(pix))
                {

                }
            }
        }
    }

You can view the full source code here

Answer 2

You can use below approach:

Path.Combine(HttpRuntime.AppDomainAppPath,"tessdata")

like below :

using (var engine = new TesseractEngine(Path.Combine(HttpRuntime.AppDomainAppPath,"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(file.InputStream))
        {
            using (var pix = PixConverter.ToPix(image))
            {

                using (var page = engine.Process(pix))
                {

                }
            }
        }
    }

Hope it helps you

Answer 3

我所做的只是将tessdata文件夹移动到主ASP.NET MVC项目，然后按照@Sunil Kumar的建议使用简单的Path.Combine(HttpRuntime.AppDomainAppPath,"tessdata") 。