im_lowpass(3) - Linux man page
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
Referenced By
im_spatres(3)