ImageMagick and GD are 2 of the most frequently used graphic software libraries on the market. They make the dynamic creation and editing of images and graphs on a website feasible, so they must be installed on a web server if you host your websites on it and you would want to have something different from static images with fixed dimensions. If ImageMagick and GD are set up, you shall be able to edit any image in a variety of ways - create thumbnails, change the colors, flip it, blur it, and so on. Needless to say, these tweaks are possible if the script app which you employ on your internet site enables you to carry out such things. The 2 libraries can easily be used with various programming languages - PHP, Python, Perl, and so forth., and support more than a hundred commonly used image formats which you will be able to work with - PNG, PSD, JPEG, TIFF, GIF and others.