This can be done with the client in Flex with Flash 10 but most more
commonly is done server side.  Here is a rough prototype I put
together a few weeks back.  It required Flash 10 and so far is only
working in Windows:
http://blog.kukiel.net/2009/02/file-manipulation-client-side-with.html

Paul.

On Mon, Mar 9, 2009 at 10:29 AM, christophe_jacquelin
<christophe_jacque...@yahoo.fr> wrote:
> Hello,
>
> For a gallery, I want to rescale the original image to have a thumbnail
> image. What instuctions to use ?
>
> Thank you,
> Christophe,
>
> 

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