Re: Estimation of Std
hi dear friend,
My mistake , I'm sorry , I misunderstood you, but now it's ok, thanks
the only pb is that i have to review my matlab code, because I used the matlab function ''imnoise'' to add an additive gaussian noise, and to change the value of the SNR I change the value ''q'' where; signal correpted with noise=imnoise(sig/q)., and when i evalueted the value of SNR (either with the two definition) it makes no sens, (for example (SNR, MSE) = (3,9),(4,10),(5,6),(6,6),(7,11),(8,3)...
best regards
nabil