.TH IM_CONV 3 "2 May 1991"
.SH NAME
im_lowpass \- remove high frequencies quickly
.SH SYNOPSIS
#include <vips/vips.h>

int im_lowpass(in, out, x, y)
.br
IMAGE *in, *out;
.br
int x, y;
.SH DESCRIPTION
Expand image up to X by Y pixels. Linear interpolation. Used by lowpass(1X)
for simple and nasty low-pass filtering. The result is very poor, but good
enough for smoothing out whites. Any number of bands, output size == input
size, any non-complex type.

.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE\ ALSO
im_shrink(3), im_similarity_area(3).
.SH COPYRIGHT
.br
National Gallery
.SH AUTHOR
Too embarrassed to say