Aug 09, 2012 07:52 AM|Menno van den Heuvel|LINK
I suppose you could use an inline data src for your img tag (more info:
http://www.websiteoptimization.com/speed/tweak/inline-images/). Notice though that this way your image will not be cached. It's also not supported in IE versions earlier than 8 (and IE8 limits data uris to 32 Kb).
Alternatively you could create an HttpHandler that returns your image based on a key (or whatever you use to get to your data) and not load the data in your page.