client-server architecture: all the “heavy lifting” is done on the server, the client only displays the image.
low bandwidth: you can work with very high resolution images even on low bandwidth connections because only the visible part of the image is transferred.
image manipulation: images can be zoomed, rotated, mirrored, their contrast and brightness or color balance can be changed on the fly without changing the original image.
referenceable views: every view, including all image manipulations can be saved as a URL and put in an email or electronic document and recreated at any time in any browser.
client-side annotations: you can put points or rectangular marks on any image as annotations that can be saved and recreated as a URL.
server-side annotations: you can also put points or rectangular marks on an image with some annotation text that is shared through an annotation server.
multiple image formats: you can use many image formats on the server so you don’t have to create a different image format for online display (TIFF, JPG, PNG, GIF, JPEG2000, and more depending on Java ImageIO support).
IIIF image API: the digilib server provides IIIF image API (V2.0) compliant access to your images besides the digilib native server API.