int im_addgnoise(in, out, sigma)
IMAGE *in, *out;
DESCRIPTIONim_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 VALUEThe function returns 0 on success and -1 on error.
AUTHORN. Dessipris - 25/04/1991