I'm looking for some open optical character recognition (OCR) raw libraries that I can use to create a Java application that compares them. Anywhere I search I find just applications to OCR.
You can use
I have used tesseract (first option) and found that it is quite accurate (not 100% in my case). I directly used trained data for recognition. You can start with following code.
Tesseract tess = new Tesseract(); tess.setDatapath(tessDataPath); //Path to tessdata directory String text = tess.doOCR(new File(path)); // Path to input image System.out.println(text)
Hope this helps.
If you are interested in a commercial solution, you can check out the LEADTOOLS OCR SDK. There is no machine training needed and it can run straight out of the box. Disclaimer: I am an employee of this company.
OCR can be performed on an image with only a few lines of code:
OcrEngine ocrEngine = OcrEngineManager.createEngine(OcrEngineType.LEAD); ocrEngine.startup(null, null, null, null); ocrEngine.getAutoRecognizeManager().run("C:\\in.tif", "C:\\out.pdf", DocumentFormat.PDF, null);