If you would want to have dynamic images on your website, the web server where you host it must have the appropriate software for that. Instead of using static images with a fixed size, you may have thumbnails and automatically resized images in accordance with the device a site visitor uses or you can even flip and invert images through a script app. All these things are feasible with ImageMagick and GD library - 2 pieces of software that may be set up on a hosting server and that work with a wide range of widespread scripting languages like: Perl, Python and PHP. This way, you may use images with any web-based application you want, no matter what language it was developed with - a custom-made Perl script or a PHP one. The two libraries will enable you to work with over a hundred different image formats such as GIF, PNG, TIFF, JPEG, etc.