Editing Image server (section)

=== Dynamic tile-based delivery ===

Browser-based viewers for high resolution images enable a responsive pan and zoom experience by requesting small tiles (typically square JPEGs or PNGs at 256x256 or 512x512 pixels) generated from the high resolution source. Only those tiles required to render the user's current viewport and zoom level are loaded, with more requested on demand as the user zooms in to particular areas. This tile generation can be done in advance and stored on the server file system as an Image Pyramid.<ref>{{cite web|last1=Gasienica|first1=Daniel|title=Inside Deep Zoom|url=http://www.gasi.ch/blog/inside-deep-zoom-1/|website=gasi.ch/|accessdate=8 March 2015}}</ref> However, this results in potentially thousands of small JPEG files with associated storage and management overhead. An Image server can respond dynamically to HTTP requests for the tiles, generating HTTP responses (the tile images) on the fly. The server requires only the single high resolution source image.<ref>{{cite web|title=About IIPImage|url=http://iipimage.sourceforge.net/|website=iipimage.sourceforge.net/|accessdate=8 March 2015}}</ref>