idea: do a match and after get a "sensitivity" that maximazes your accuracy.

[Kirin]

for the math addicted here's the complete derivation :)

zip file with a HTML page (& related images) that show the complete derivation of the method
http://www.mediafire.com/?k0bfa08vo0bdeg9

PDF file (lower quality images)
http://www.mediafire.com/?ech47z7wg70mc78


and surprise surprise!! XD
SOURCE CODE:
removed (changed method, very similar, but the new always manages to output a result unlike the old one)