A Pixel Based Signature Authentication System

Signature verification is the process used to recognize an individual’s h a n d -written s i g n a t u r e . The p r o c e s s o f verifying signature is cumbersome in practice. There is a need for automatic verification system for a signature since the signature has been a means of a person’s identification through ages. Verification of a signature can be done either Offline or Online based on the application. Online systems use dynamic information of a signature captured at the time the signature is made. Offline systems work on the scanned image of a signature. In this paper, we verify the off-line signatures by taking a boundary of the entire signature and do the pixel comparison. Signature is acquired using a scanner. Detection process is done after the data acquisition and pre-processing. Pre processing includes noise removal, grey-scale, manipulation, edge detection. Experimental results show that 50% of the accurate matching with the existing one from the data base. Signature is a behavioral biometric: it differs from finger print, face, iris recognition, because these are based on the physical properties of human beings. There is animportant distinction betweensimple signatureComparisonsanddynamicsignatureverification. Both can be computerized, but a Simple comparison only takes into account what the signature looks like. Dynamicsignatureverificationtakesintoaccounthowthe signature was made.With dynamicsignature verification it is not the shape or look of the signature that is meaningful; it is the change in speed, pressure and timing that occur during the act of signing. Only the original signer can recreate the changes in timing and X, Y and Z (pressure). A pasted bitmap, a copy machine or an expert forger may be able to duplicate what a signature looks like, but it is virtually impossible to duplicate the timing changes ins X, Y and Z (pressure). The practiced and nature motion of the original signer would require repeating the pattern shown. There w i l l al ways be sli ght vari at i ons in a Person’s hand-written signature, but the consistency created by natural motion and practice over time creates a recognizable pattern that makes the hand-written signature a natural for biometric identification.Signature v e r i f i c a t i o ni s n a t u r a la n di n t u i t i v e . The technologyiseasytoexplain and trust. The primary advantage that signature verification systems have over types of biometric technologies is that signatures are already accepted as the common method of identity verification. This history is trust means that people are v