how to set threshold for face recognition system??

i have compress data by PCA now i want to detect the image using threshold.. how to set threshold.. thanks.

[Ihssane Bouasria]

Hi!!unfortunately I don't have the answer for your question but this is my project of the image's treatment!I m wonder if u can share me your ressources and informations! P.S:good luck and I wishe that u get your answer!!! my @: [e-mail]

[Aftab Alam]

contact on this: [e-mail].. its facebook account.. contact on this,.