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NAME

       im_addgnoise - add gaussian noise to an image

SYNOPSIS

       #include <vips/vips.h>

       int im_addgnoise(in, out, sigma)
       IMAGE *in, *out;
       double sigma;

DESCRIPTION

       im_addgnoise()  adds  gaussian noise with mean 0 and standard deviation
       sigma to the image held by the  image  descriptor  in  and  writes  the
       result  on  the  image  descriptor out.  The function works on any non-
       complex input image.  Input can have any no of  bands.   The  noise  is
       generated by adding 12 random numbers.

RETURN VALUE

       The function returns 0 on success and -1 on error.

SEE ALSO

       im_add(3), im_lintra(3), im_multiply(3).

COPYRIGHT

       N. Dessipris

AUTHOR

       N. Dessipris - 25/04/1991

                                  14 May 1991