DjVu ( / ˌ of eɪ ʒ ɑ v u / DAY -zhah- VOO , like English ” seen ” [3] ) is a computer file format designed Primarily to store scanned document , Especially Those Containing a combination of text, line drawings , indexed color images, and photographs. It is used as a background image, progressive loading , arithmetic coding , and lossy compression for bitonal ( monochrome) images. This allows you to get high-quality, readable images to be stored in a minimum of space, so they can be made available on the web . Continue reading