Over the last few decades, several face databases have been constructed to analyze the effectiveness of recognition of faces approaches. The brief introduction of selected databases is as follows. In most cases the link to database download is provided.
A. The AR database
This 12 is a databases which has practical occlusions and are open to the public. It has higher than four thousand color pictures of one hundred twenty six people faces (seventy male and fifty six female). The pictures endure from several changes in facial expressions, illuminations and occlusions (i.e., scarves and sunglasses). They were collected underneath perfectly controlled situations. There were no restrictions obligatory on wear of individuals (clothes, glasses, etc.), makeup, hair style, etc. For every person, 26 images were captured in two sessions (two weeks apart) 1.
The limitations of the AR database are that it only contains two types of occlusions, i.e., scarf and sunglasses, and the location of the occlusion is either on the upper face or lower face. This database can be downloaded from the link http://rvl1.ecn.purdue.edu/~aleix/aleix face DB.html 12.