First of all you should know that nobody here will provide you a complete solution to your problem.
Since you said for yourself that you are working on a
research project you will have to do some research first. There are many ways to do research the most common these days using search engines like google. To find scientific papers you can use google scholar for example.
Some topics or keywords which should help you find informations are: pattern recognition, machine learning, OCR, text recognition, image processing
Here is only one example for a scientific paper found with these keywords but of course there are many other freely available resources out there and also lots of good books regarding your topic.
http://deeplearningworkshopnips2010.files.wordpress.com/2010/11/nips2010_cameraready.pdf[
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You can also search for course notes/slides or master, bachelor and phd thesis which are available for free pretty often.