RF Sign: Signature Anticounterfeiting Real-Time Monitoring System Based on Single Tag

Figure 17

Signal comparison of two users writing the letter A (in the figure, the graph key uses the blue line to represent the red signal line). (a) The strength of user 1's writing of the letter A. (b) The length of pause interval A when user 1 is writing. (c) How hard user 2 writes the letter A. (d) How long the pause interval is when user 2 writes.

(a)

(b)

(c)

(d)