DjVu (/ˌdeɪʒɑːˈvuː/ DAY-zhah-VOO, like French: déjà vu [deʒavy]) is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, indexed color images, and photographs. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal (monochrome) images.