Search is not finding keywords in picture library

I just setup a SharePoint 2013 server and created a picture library.

I posted a test picture and entered several words in the keyword box. This field is there by default.

When I search for the keywords, I do not receive any results. If I search for the title, I do receive the picture in the results.

What do I need to do to enable the search to find the keywords? I would think it would work by default. Otherwise, what is the point of having keywords?

Thanks for your help.

Joshua Lance