If you would like to have dynamic images on your site, the machine in which you host it should have the correct software for that. Instead of using static images with a fixed size, you can have thumbnails and automatically resized images based on the device a site visitor uses or you may even flip and invert images using a script application. All of these things are feasible with ImageMagick and GD library - two pieces of software which can be installed on a server and that work with a great number of frequently used scripting languages such as: Perl, Python and PHP. In this way, you may use images with any web-based application that you would like, regardless what language it was designed with - a custom-made Perl script or a PHP one. The 2 libraries shall allow you to work with more than 100 different image formats like GIF, PNG, TIFF, JPEG, etcetera.