| .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 |
