Check if a document library is a picture library

I need to get all of the site's document libraries except for picture libraries.

This is my code:

var libraries = SPContext.Current.Web.GetListsOfType(SPBaseType.DocumentLibrary);

My problem is that this returns also the picture libraries. I need only document libraries, not picture libraries.

I had searched a lot for an answer in Bing and here before I posted this question.

Any Idea?