You can try imageinfo query with iiprop=url and iiurlwidth / iiurlheight.
It seems to return and URL for a picture with the required size.
On Mon, Oct 18, 2010 at 4:04 PM, Gabriel Sandor <gabi.t.sandor(a)gmail.com>wrote;wrote:
Is it possible to retrieve via the Wikipedia API (or index.php) a thumbnail
of a picture given its file name ? All i know currently is that there's the
...index.php?title=Special:FilePath/<FileName> page but i do not know how i
could use it to get in my application a thumbnail with the specified
dimension instead of the full resolution picture.
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