10. The computer-readable medium excluding signals, the computer-readable medium of claim 4 having computer-executable instructions to perform: (d)(i)(l) approximating the stroke by linear regression.
10. The computer-readable medium excluding signals, the computer-readable medium of claim 4 having computer-executable instructions to perform: (d)(i)(l) approximating the stroke by linear regression. 11. The computer-readable medium excluding signals, the computer-readable medium of claim 10 having computer-executable instructions to perform: (d)(i)(2) merging adjacent segments of the stroke.