IM_CONV(3)
NAME
im_lowpass - remove high frequencies quickly
SYNOPSIS
#include <vips/vips.h> int im_lowpass(in, out, x, y) IMAGE *in, *out; int x, y;
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.
RETURN VALUE
The function returns 0 on success and -1 on error.
SEE ALSO
im_shrink(3), im_similarity_area(3).
COPYRIGHT
National Gallery
AUTHOR
- Too embarrassed to say