ALTERATION POSSIBILITY DETECTION SYSTEM AND PROGRAM

PROBLEM TO BE SOLVED: To provide an alteration possibility detection system, capable of easily detecting alteration and displaying an altered part by managing information entered using an electronic pen by a user in time series. SOLUTION: The alteration detection system 100 extracts an entry start time and an entry end time to each field that is a component of an item by referring to coordinate information based on a position coordinate on a dot pattern contained in entered information, and calculates the time required for entry to each field of a form by a writer. Further, the calculated time is compared with a preset valid entry time to each field, and when the time required for entry to a predetermined field by the writer is longer than the valid entry time, possibility of alteration is determined, valid stroke data entered within the valid entry time and additive stroke data entered since the valid entry time are extracted respectively from the entered information, and the respective stroke data are discriminated and displayed so that a positional relationship on the format between them can be acquired. COPYRIGHT: (C)2010,JPO&INPIT