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If you use Firefox, you can install Customize Google extension that, among other feaures, rewrites links to point straight to the images. Or if you have GreaseMonkey installed, you can add the script from here.
For Opera, save the script from UserJS.org to a folder on your computer and make sure you set the option from [Tools/Preferences/ Advanced/Content/ JavaScript options/My JavaScript files] to that folder.
Internet Explorer has a GreaseMonkey clone, called Trixie, that supports most GreaseMonkey scripts, so you can use the script for Firefox.