colormap-vmirror!
Synopsis
(colormap-vmirror! colormap)
Parameters
- colormap
Description
This procedure mirrors the colormap destructively and vertically thus exchanging the upper and lower half accordingly.
Side Effects
The colormap is modified.
Return Value
The mirrored colormap is returned.
Example
> (define image (colormap-readjpg "horses.jpg"))
image
> (colormap-writejpg (colormap-vmirror! image) "horses-vmirrored.jpg")
ok
>
The input image displays as follows (horses.jpg, JPG, 2400x1600):
The vertically mirrored image looks like this:
