Image Source and the Law

Copyrighted Photos
It gives protection to authors for their original works, such as photographs.
http://www.kodak.com/global/en/consumer/doingMore/copyright.shtml

Stock Photos
An existion photo that can be purchased for use instead of have a photograph specifically made.
www.vistek.ca/glossary/default.asp

Public domain photos
clip art, images, text, programs, etc. that is not copyrighted.
http://webclipart.about.com/cs/msub28/g/public.htm

Royalty free photos
Clip art, images, graphics, and photographs which may be offered to the public or individuals to be used in specified ways.
http://webclipart.about.com/cs/msubmenuaz/g/royalty.htm

Model Release for photos
When using pictures that contain clearly recognizable faces of people, a model release protects you against legal claims by the persons in the photo.
http://desktoppub.about.com/od/copyrights/g/modelrelease.htm