resizing and publishing images

Hi all,

I have a couple of pictures that I want to link into my muse-wiki.  I
place them in a subdirectory "images".

[[images/example.jpg]]

then shows up fine in emacs.  However, the image is not copied to the
published directory, which means that it doesn't show up in my
webpage.  Is there a function which automates this?

Further, is it possible to resize an image, i.e. something like

[[images/example.jpg size:0.5]]?

Thanks for any tips!

Cheers
Stéfan