im_zoom - zoom an image
#include <vips/vips.h>
int im_zoom(in, out, xfac, yfac)
IMAGE *in, *out; int xfac, yfac;
im_zoom() zooms (ie. nearest neighbour upsampling) the image held by
the image descriptor in by factors xfac and yfac and writes the result
to the image descriptor out. Works for any type of image, even
LABPACK.
The function returns 0 on success and -1 on error.
im_copy(3), im_affine(3).
National Gallery, 1994.
11 April 1990