Question Compare Images and choose the similar one

[Syzis]

Hello,

I'm making a project in VB .Net 2010 and I have one question that's annoying me.

An example, I have 3 images. All of them have a different background color and each have a different font used but have the same "number".

Basically, I have 3 images, one with black background and another with red one. One image haver the number one "1" write in Arial and another with the same number but in comic sans and a third with number two "2"

There's anyway to VB tell that are the same number inside?
Maybe if I compare pixel to pixel and choose the one with less difference in pixels will do it?

Any ideas in how to do it?

Thanks in advance.

 

[JohnH]

Implementing OCR is quite difficult, you may want to look for a library that can provide this functionality for you. If you have Office 2003 or newer there is included the Microsoft Office Document Imaging library (MODI) that can do this, see for example OCR functionality through MODI for extracting text information from Image file in VB.NET