Method
VipsImageshrinkv
Declaration [src]
int
vips_shrinkv (
VipsImage* in,
VipsImage** out,
int vshrink,
...
)
Description [src]
Shrink in vertically by an integer factor.
Each pixel in the output is
the average of the corresponding column of vshrink pixels in the input.
This is a very low-level operation: see vips_resize() for a more
convenient way to resize images.
This operation does not change xres or yres. The image resolution needs to be updated by the application.
::: tip “Optional arguments”
* ceil: gboolean, round-up output dimensions
::: seealso
vips_shrinkh(), vips_shrink(), vips_resize(),
vips_affine().
Parameters
out |
VipsImage |
Output image. |
|
| The argument will be set by the function. | |
| The instance takes ownership of the data, and is responsible for freeing it. | |
vshrink |
int |
Vertical shrink. |
|
... |
none |
|