DjVu

Definitions

1. A file format intended to represent electronic documents, particularly scanned text.
   uncountable
2. A file encoded in the DjVu format.
   countable

Examples

“DjVu was developed at AT&T Research⟳ by Yan LeCun et al. in 1966. It generates files that are smaller than PDF files. […] PDF primarily encodes graphics and text as vectorized data, whereas DjVu primarily encodes them as pixmap images.”

“DjVu is a relatively old and no longer developed file⟳ format devised by AT&T, used to store scanned images. None of the VirusTotal anti-virus scanners detected the CySource researchers' Base⟳64 encoded payload added to the metadata of the malicious DjVu file⟳. The researchers found that "instead of exiftool detecting the metadata of the file⟳ it executes our payload."”

“Because of Wikimedia's educational mission, MediaWiki supports file⟳ types that may be uncommon in other web applications or CMSes, like⟳ SVG vector images, and multipage PDFs and DjVus. They are rendered as PNG files, and can be thumbnailed and displayed inline, as are more common image files like⟳ GIFs, JPGs and PNGs.”

“Reading pdf or djvu documents on a mobile reader such as Amazon's Kindle, the Nook or even your smartphone can be quite the challenge⟳ due to the smaller screen size.”

“The main idea of DJVU is to decompose the document image into three constituent images [17] from which the original document can be reconstructed. The constituent images are: the background image, the foreground image, and the mask image. The first two are low-resolution (100 and 25 dpi, respectively) color images, and the latter is a high-resolution bilevel image (300 dpi).”

CEFR level