 | |
| Filename extensions |
.djvu, .djv |
|---|---|
| Internet media type |
image/vnd.djvu, image/x-djvu |
| Magic number | AT&T |
| Developed by | AT&T Labs – Research |
| Initial release | 1998 |
| Latest release | Version 26[1] April 2005 |
| Type of format | Image file formats |
| Contained by | Interchange File Format |
| Open format? | Yes |
DjVu[a] 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. This allows high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web.
DjVu has been promoted as providing smaller files than PDF for most scanned documents.[3] The DjVu developers report that color magazine pages compress to 40–70 kB, black-and-white technical papers compress to 15–40 kB, and ancient manuscripts compress to around 100 kB; a satisfactory JPEG image typically requires 500 kB.[4] Like PDF, DjVu can contain an OCR text layer, making it easy to perform copy and paste and text search operations.
Free creators, manipulators, converters, web browser plug-ins, and desktop viewers are available.[2] DjVu is supported by a number of multi-format document viewers and e-book reader software on Linux (Okular, Evince, Zathura), Windows (Okular, SumatraPDF), and Android (Document Viewer,[5] FBReader, EBookDroid, PocketBook).
- ^ "Lizardtech DjVu Reference" (PDF). Cuminas.jp. p. 25. Retrieved 7 December 2021.
- ^ a b "DjVu.org – the premier menu for djvu resources". djvu.org. Archived from the original on 2017-06-29. Retrieved 2017-07-02.
{{cite web}}: CS1 maint: unfit URL (link) - ^ "What is DjVu – DjVu.org". DjVu.org. Archived from the original on 2019-01-21. Retrieved 2009-03-05.
- ^ Léon Bottou; Patrick Haffner; Paul G. Howard; Patrice Simard; Yoshua Bengio; Yann Le Cun (1998). "High Quality Document Image Compression with DjVu, 7(3):410–425" (PDF). Journal of Electronic Imaging.
- ^ Document Viewer, Sufficiently Secure, 2022-04-04, retrieved 2022-04-09
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