[Transfer Function - 3D CTF correction, Freq. dependent snr]
USAGE
.OPERATION: SN RF
.PASS AND STOP FREQUENCIES: 0.1,.2
[Pass and stop frequencies for Butterworth filter.]
.NUMBER OF POINTS: 128
.RANGE [0,1] THAT FSC IS MAPPED TO [FSCmin:FSCMax]: 0.1, 0.98
.FACTOR APPLIED ON FSC/(1-FSC): 2
NOTES
Create SNR curve from Butterworth FSC shape. The SSNR is
equal to :
SNR(f)= A FSC'/(1-FSC')
Where 'A' is the factor (set to 2 in the previous example),
FSC' is FSC mapped from [0,1] to [0.1,0.98] (in the previous
example).
FSC' = FSCMin + FSC (FSCMax-FSCMin)