.TH IM_STRETCH3 3 "Sep 18 1997"
.SH NAME
im_stretch3 \-  stretch horizontally by 3%, displace sub-pixel
mask
.SH SYNOPSIS
#include <vips/vips.h>

int im_stretch3( in, out, xdisp, ydisp )
.br
IMAGE *in, *out;
.br
double xdisp, ydisp;

.SH DESCRIPTION
im_stretch3() stretches the input image by 3% horizontally, and displaces it
by xdisp/ydisp. It uses bi-cubic interpolation, but runs quickly. It works
only for unsigned short images.

This function is part of the MARC acquisition software, but is generally
useful for squaring up the pixels in images from the Kontron ProgRes camera
range.

.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE ALSO
im_conv(3), im_shrink(3).
.SH COPYRIGHT
The National Gallery, 1997