4 Image License Types: Photo Stock Licenses & Usage Rights
As I said in my previous post it is important to pay greater attention to image license prior to picture’s download. You have to check thoroughly what you can and what you cannot do with the images. Sometimes you are not allowed to use the image for commercial purposes, to modify it, to display the image more than a certain number of times, etc. Anyway it is preferable to give a credit to the author.