The title might already say it. In one of my projects I'm currently looking for a solution to show additional metadata to an image on mouseover/hover. The first idea I had was to use the build in Tiles View of the image library in SharePoint 2013. It's OOTB but not customizable, right? The second one was to use the promoted links feature. I can add custom values to the built in fields, but I have to use two lists (one for uploading images, another for metadata).
Maybe this can be achieved by using CEWP or Search Web Parts? Or do I have to publish the custom metadata to the search service first?
Maybe some of you have different ideas, more practical?! I need to say: There are several image libraries all over the SharePoint so I need to do the same work several times, for every library (or web part page) to display.