Reference: I`laam al-Mu`aasireen bi-Fataawa Ibn `Uthaymeen – Page 215
Question: Is erasing the face in pictures sufficient?
Response: If the face is erased from the picture, then by doing so you have attained what is required; Because a real picture is not complete without a face, and the face includes the whole head; So if it is erased, then no harm remains.