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flgamma

$ \bigcirc$Name


flgamma Create a x $ \hat{{}}$  gamma signal, 0 <  = x/s <   n (2-Flist)




$ \bigcirc$Command Synopsis


flgamma [-g g] [-n n] [-s s] [-f f] out



-g g : gamma power (default 2.)

-n n : number of samples (default 256)

-s s : step on x (default 1.)

-f f : apply scale factor to ensure fixed point : out(f)=f

out : output Flist




$ \bigcirc$Function Summary


Flist flgamma (out , g , s , n , f )

Flist out ;

float *g , *s , *f ;

int *n ;




$ \bigcirc$Description


This modules creates a 2-Flist l = (xi, h(xi)) with 0 $ \leq$ i < n, xi = i . s and

h(x) = K . xg.

The normalization constant K is equal to 1, unless the -f option is selected, yielding K = f1-g (so that h(f )= f). This module may be used in conjonction with fcontrast to apply a so-called gamma-correction on a Fimage.




$ \bigcirc$Version 1.1


Last Modification date : Tue Oct 29 23:53:37 2002


$ \bigcirc$Author


Lionel Moisan






next up previous contents index
Next: fnoise Up: Reference Previous: fhisto   Contents   Index
mw 2004-05-05