I will be trying to recognize user signature, sever-side, written with a digital pen like this one. 
I have absolutely no experience working with a digital pad like this and the pads aren't cheap to just "try buying and see". What would be a good approach to store and verify the user signature generated by a pad like this?
I have found the question Handwritten signature comparison but the answer provided seems to deal with recognizing handwritten letters, rather than working with a user signature.
Signature Verification on OpenCV Forum and hand-written custom shapes recognition only suggest that this is a difficult task.
Is this an unusual task that i am trying to achieve and the pads like these are used only as a tool for storing the signature in a meaningful way in a database? If so, is it a standard to store the data as a bitmap or are signatures stored as a sequence of vectors?
If someone has any experience working with pads like these, any help would be appreciated.
