How to speed up tesseract OCR

Question

I'm trying to OCR a lot of documents(I mean in 300k + range a day). At the moment i'm using Tesseract wrapper for .NET and it's all good in quality but the speed is not good enough. The times i get for 20 tasks in parallel scanning of a half page from the same pdf in average are 2,546 second per scan. The code im using:

using (var engine = new TesseractEngine(Tessdata, "eng", EngineMode.TesseractOnly))
        {
            Page page;
            page = engine.Process(image, srcRect);        
            var text = page.GetText();
            return Task.FromResult(text);
        }

The average time i get is after lowering the resolution of image by half and converting it to grayscale. Any ideas to speed up the process? I don't need to have text segmentated, just the text in one line. Should i maybe use something as Matlab for c#?

How to speed up tesseract OCR

1 Answers