If you would want to have dynamic images on your website, the web server in which you host it must have the correct software for this. As an alternative to using static images with a fixed size, you can have thumbnails and automatically resized images dependant upon the device a visitor uses or you may even flip and invert images using a script application. All of these things are possible via ImageMagick and GD library - 2 pieces of software which may be installed on a web server and that work with a great number of popular scripting languages such as: Perl, Python and PHP. Thus, you can use images with any web-based app you'd like, regardless of the language it was created with - a custom-made Perl script or a PHP one. The 2 libraries will allow you to work with over a hundred different image formats such as GIF, PNG, TIFF, JPEG, and so on.