ImageMagick and GD are 2 of the most frequently used graphic software libraries available on the market. They make the dynamic creation and editing of images and graphs on an internet site feasible, so they must be set up on a server if you host your internet sites on it and you would like to have something different than static images with fixed dimensions. If ImageMagick and GD are installed, you shall be able to edit any image in many different ways - generate thumbnails, change the colors, flip it, blur it, and so on. Needless to say, these modifications are possible if the script app that you employ on your internet site enables you to carry out such things. The two libraries can be used with numerous programming languages - PHP, Python, Perl, etc., and support more than a hundred frequently used image formats that you'll be able to work with - PNG, PSD, JPEG, TIFF, GIF and many more.