If you would want to have dynamic images on your website, the machine where you host it must have the suitable software for this. As an alternative to using static images with a fixed size, you could have thumbnails and automatically resized images in accordance with the device a website visitor uses or you could even flip and invert images through a script app. All these things are doable via ImageMagick and GD library - two pieces of software which can be installed on a server and which work with a large amount of frequently used scripting languages including: Perl, Python and PHP. Thus, you could use images with any web-based app that you would like, regardless of the language it was designed with - a custom-made Perl script or a PHP one. The 2 libraries shall allow you to work with over 100 different image formats including GIF, PNG, TIFF, JPEG, etc.