Patent Document ID: 5425109
Application ID: 08126410
Patent Flag: 1

Claim One:
1. A system for identifying freehand curve drawings comprising: a tablet device having a display/input surface, a display device for displaying data on the display/input surface and a pen for inputting a freehand curve drawing by a trace on the display/input surface as a series of point data representing a series of points of the drawing; and a curve identifying device for executing a process for identifying a curve from the series of point data being inputted through the tablet device; said curve identifying device comprising: (1) a memory for storing results of execution of the process for identifying a curve and providing the results to the display device of the tablet device for displaying the results on the display/input surface; (2) fuzzy curve information generating means for generating fuzzy curve information by adding input positional vagueness information to each point data of the series of point data being inputted through the tablet device, said input positional vagueness information being generated in accordance with input behavior of the freehand curve drawing by use of the pen on the display/input surface of the tablet device; (3) segmentation means for dividing the fuzzy curve information into a plurality of segments by evaluating a degree of standstill at each of the points of the drawing based on said input positional vagueness information, and for outputting to the memory a result of division of the fuzzy curve information, said degree of standstill representing a possibility that each of the points of the drawing is a stop of a stroke of the pen on the display/input surface of the tablet device when inputting the freehand curve drawing; and (4) curve class identifying means for identifying a curve class and a representative curve in the curve class by measuring a possibility of the curve class for each of the segments with respect to each of a plurality of curve classes, and for outputting to the memory a result of identification of a curve class.