How to resize images stored in sql server database in ASP.Net

I have some images stored in the sql server database and i am displaying the images in their original size at the moment. But i want to resize the images so that they load faster over internet. Want to know how can i do this?  I came across this http://www.aspdotnet-suresh.com/2011/05/how-to-resize-size-image-without-losing.html But i am not sure if this will work in case of images stored in varbinary format in sql server database. Also i do not just want to generate thumnails, i would like to learn how to generate different sized image.