libvips/man/im_addgnoise.3

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.TH IM_ADDGNOISE 3 "14 May 1991"
.SH NAME
im_addgnoise \- add gaussian noise to an image
.SH SYNOPSIS
#include <vips/vips.h>
int im_addgnoise(in, out, sigma)
.br
IMAGE *in, *out;
.br
double sigma;
.SH 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.
.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE ALSO
im_add(3), im_lintra(3), im_multiply(3).
.SH COPYRIGHT
N. Dessipris
.SH AUTHOR
N. Dessipris \- 25/04/1991