If you would like to have dynamic images on your site, the machine where you host it needs to have the appropriate 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 site visitor uses or you can even flip and invert images through a script app. All of these things are doable via ImageMagick and GD library - two pieces of software which could be set up on a web server and that work with a lot of widespread scripting languages including: Perl, Python and PHP. This way, you may use images with any web-based application that you would like, regardless what language it was developed with - a custom-made Perl script or a PHP one. The two libraries will allow you to work with more than a hundred different image formats including GIF, PNG, TIFF, JPEG, and so forth.