hi,
You are looking for libraries so it seems you already have the SDK
for your camera.
What you are looking for is a text recognition application .
The camera captures the image and the application processes it to recognize characters and process them accordingly.
There is a popular library called
OpenCV[
^] which can help you here.
They also have a forum where you can search for related questions.
Have a look at
this link[
^] too.
hope it helps !!