This is a new article by Jim Fetzer and Larry Rivera concerning how the Altgens photo got altered. And it most certainly got altered, it being one of the most altered photos in the history of photography. We note at least 7 alterations in the doorway alone, but there were other alterations in the area of limousine and elsewhere.
http://www.veteranstoday.com/2013/08/22/jfk-the-cartha-deloach-fbi-memorandum-and-the-altgens6/