Image slider link to internal or external page

I am trying to create an image slider where each image in the page links to an internal or external page. I created a separate library for all the images that I want to show on the slider then using custom MVC widget I display the images in a slider.The problem that I have is there is no place in the image where I can link the image to open an existing internal page or external website.

Is there a way to add a properties to the original Image properties? so that users can select a page (using some sort of page selector just like in the navigation widget) or type in external page to link. If that is not possible, could you give me some ideas how to implement this? 

I suppose if thats how you're doing it you could add a new custom field to your images (bottom right sidebar in the backend images) to store the url?

Ah I thought the setting would be found in the each of the library. Apparently it is in the "Images" main window. Thanks!