Electronic Signature in the Apex form

Hello all,
I am new in apex. I have a form which includes blob column. Also , I have a ePad signature pad (E-Signature) installed on my pc. I want to sign on the pad and get the data from the signature pad and save it as a ipg file in the blob column. I have no idea how should I do that. Could you please help me. I appreciated.

No ideas....