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There are two simple modules:There’s a solution outlined in [[Using_Graphics#Image_Conversion]]; the rest of this page is outdated.
outdated hint
Downsampling means to reduce the resolution of a picture to save space.
== grph-downsample ==
'''This doesn’t work any more; it was a bit better than the script in [[Using_Graphics#Image_Conversion]].'''
This MkIV module is not in the distribution and not documented, but you can download it from [http://modules.contextgarden.net/grph-downsample here]. It expects the <code>gm</code> tool from [http://www.graphicsmagick.org GraphicsMagick] to be callable and works on PNG, JPG and GIF pictures.
