All FSI Viewers are included in the FSI Server product.
The concept of dynamic single source imaging allows a single high-resolution image to be used to retrieve images in different sizes based on that single high-resolution image. FSI Server Software provides the necessary functionality to scale, rotate and/or enhance any image before delivering it to the user. In contrast to normal Webserver Software, where each image has to be stored once in every resolution needed (e.g. Thumbnails and alike), FSI Server Software creates each image requested on the fly.
Due to the different possible magnification states for each image displayed in FSI Viewer, FSI Server Software is mandatory.