The present invention relates to a jotting implement that infers
hand-jotted information from a jotting surface. The hand-jotted
information is any information marked on the jotting surface as a result
of writing, jotting, drawing, sketching or in any other manner of marking
or depositing marks on the jotting surface. Hand-jotted information is
also information traced on the jotting surface without leaving any
markings thereon or otherwise produced by the motions executed by the
jotting implement with respect to the jotting surface while in contact
with the jotting surface. The jotting implement has a nib for jotting and
an arrangement for determining when the nib is jotting on the jotting
surface. Further, the implement has an optical unit for viewing the
jotting surface. The implement also has a processing unit for receiving
optical data of said jotting surface from the optical unit and
determining from it the physical coordinates of the nib with respect to
at least one corner of the jotting surface and at least one edge of the
jotting surface and/or other landmarks or optically recognizable features
on the jotting surface.