Table of Contents
im_lowpass - remove high frequencies quickly
#include <vips/vips.h>
int im_lowpass(in, out, x, y)
IMAGE *in, *out;
int x, y;
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.
The function
returns 0 on success and -1 on error.
im_shrink(3)
, im_similarity_area(3)
.
National Gallery
Too embarrassed to say
Table of Contents