If you would like to have dynamic images on your internet site, the server in which you host it needs to have the proper software for that. Instead of using static images with a fixed size, you could have thumbnails and automatically resized images based on the device a visitor uses or you could even flip and invert images via a script app. All these things are feasible with ImageMagick and GD library - two pieces of software which could be set up on a server and that work with a wide range of widely used scripting languages like: Perl, Python and PHP. In this way, you can use images with any web-based app that you'd like, regardless of the language it was designed with - a custom-made Perl script or a PHP one. The 2 libraries will permit you to work with over one hundred different image formats such as GIF, PNG, TIFF, JPEG, etcetera.