I had a request to have a company logo that was incorporated into a larger image contain a link to a new company website. The solution: Create an HTML image map and refer to that image map in the <img> tag. I used Paint.Net to get the coordinates of the logo for the coords attribute of the <area> tag. For more details, follow this link. Thanks Nebojsa Pajkic!
<area shape="poly" coords="32,92,89,65,147,96,87,122,48,114" href="http://NewCompanyWebSite.com" />
<img src="images/largeImageWithLogo.jpg" usemap="#CompanyLogo">
Here is a link
on how to optimize WPF performance. Here is link
for a performance profiling tool for WPF from MSDN.