If you would like to have dynamic images on your internet site, the server in which you host it must have the appropriate software for that. Rather than using static images with a fixed size, you could have thumbnails and automatically resized images in accordance with the device a site visitor uses or you could even flip and invert images through a script application. All of these things are doable with ImageMagick and GD library - 2 pieces of software which can be set up on a server and which work with a large amount of widespread scripting languages such as: Perl, Python and PHP. In this way, you may use images with any web-based application that you would like, no matter what language it was created with - a custom-made Perl script or a PHP one. The 2 libraries shall allow you to work with over a hundred different image formats such as GIF, PNG, TIFF, JPEG, etcetera.