| .TH SHRINK 3 "2 May 1991" |
| .SH NAME |
| im_shrink \- shrink an image |
| .SH SYNOPSIS |
| #include <vips/vips.h> |
| |
| int im_shrink(in, out, xfactor, yfactor) |
| .br |
| IMAGE *in, *out; |
| .br |
| double xfactor, yfactor; |
| |
| int im_resize_linear(in, out, X, Y) |
| .br |
| IMAGE *in, *out; |
| .br |
| int X, Y; |
| |
| .SH DESCRIPTION |
| |
| .B im_shrink(3) |
| shrink the input image file by |
| .B xfactor |
| along the horizontal and |
| .B yfactor |
| along the vertical direction. The function does not perform subpixel |
| interpolation and therefore the resultant image can present aliasing especially |
| for small x and y factors. Any size image, any non-complex type, any number of |
| bands. |
| |
| .B im_resize_linear(3) |
| resizes the image to be |
| .B X |
| by |
| .B Y |
| pixels. It is slow, only does bilinear interpolation (and so will be |
| inaccurate for factors greater than two), and uses WIO, so it has a 2GB image |
| size limit and will use large amounts of memory. Use |
| .B im_shrink(3) |
| in preference if possible. |
| |
| .SH RETURN VALUE |
| The functions returns 0 on success and -1 on error. |
| .SH SEE ALSO |
| im_affine(3) |
