Does anyone know a way to stop people linking to images for my post diirectly,  I see in my web stats all the time direct links to images such as:

/wp-content/uploads/2011/10/wpid-facebook_302985649.jpg

What I would like to do is capture these and redirect them to the page or post that the image is on as I probably am loosing ad revenue from people stumbling the image and then others directly loading it and I want to minimize that.

I suppose I could use htaccess and redirect any image request coming from stumbleupon.com to a page in my site but I want something that could cleanly redirect any request from any domain that is requesting an image linked in a post to open the post and not the image.

 Anyone?!