Patent ID: 7840571

Claim:
A method for information management, comprising: receiving a first image produced from scanning an original copy of a handwritten identifier in response to a first user command; comparing the identifier to a set of prerecorded identifiers; adding the identifier to the set of prerecorded identifiers, if the identifier shares less than a predetermined similarity with any identifier within the set of prerecorded identifiers; linking the identifier to a set of information; receiving a second image produced from scanning the original copy a second time in response to a second user command; matching the second scan of the original copy with the first scan of the original copy; retrieving the set of information in response to the matching; computing a signature of the identifier; and requesting a new identifier if the signature shares more than a predetermined similarity with a prerecorded identifier; wherein computing includes selecting a set of identifier features for the signature which are scale and rotation invariant.