Name | DJVU | |
Full name | DJVU - DJVU Ebook Format | PDF - Portable Document Format |
File extension | .djvu, .djv | |
MIME type | image/vnd.djvu, image/x-djvu | application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf |
Developed by | AT&T Labs - Research | Adobe Systems |
Type of format | Document file formats | Document format |
Description | DjVu 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. | The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. |
Technical details | DjVu 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 for high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web. | The PDF combines three technologies: A subset of the PostScript page description programming language, for generating the layout and graphics. A font-embedding/replacement system to allow fonts to travel with the documents. A structured storage system to bundle these elements and any associated content into a single file, with data compression where appropriate. |
File conversion | DJVU conversion | PDF conversion |
Associated programs | SumatraPDF, Evince. | Adobe Acrobat, Adobe InDesign, Adobe FrameMaker, Adobe Illustrator, Adobe Photoshop, Google Docs, LibreOffice, Microsoft Office, Foxit Reader, Ghostscript. |
Wiki | https://en.wikipedia.org/wiki/DjVu | https://en.wikipedia.org/wiki/Portable_Document_Format |
File extension | .djvu |
File category | books |
Description | DjVUI was first created by AT&T and functions as technology used for compressing images and has a free and available source code and it proxy to PDF. It allows distribution of scanned documents, photographs and high definition images on the internet. There are an entire set of DjVU viewers, browser add-ons, and devices for execution of binary codes which exists on both windows and Mac devices. |
Technical details | In early 1990s and 2000s, the AT&T developed DjVU by Yann LeCun, Leon Bottou, Patrick Haffner, and Paul G. Howard. It is viewed as superior compared to PDF due to its ability to easily convert large amounts of text to DjVU, its small-sized files and people can use it freely. The separation of DjVU is categorized into three types of images that is background, foreground and mask image whose resolution is higher. The compression algorithm IW44 is used for compressing foreground and background images whereas the JB2 is using in compressing mask images. This leads to significant reduction of an image. |
Programs | MacDjView Desktop Viewer |
Main program | DjVuLibre DjView |
Developer | AT&T Labs |
MIME type | image/vnd.djvu application/octet-stream |
File extension | |
File category | documents |
Description | PDF – is a cross-platform extension necessary for the visualization of printed materials in electronic form. It is developed by Adobe Systems using separate PostScript resources. PDF documents can exist separately from the OS or hardware tools with which they were developed. Files of this format do not have restrictions on the length, several types, and image options, as they allow you to embed various multimedia tools, scan-line, and vector images. They are supported by Adobe Reader and many browsers, providing the plugin is installed. |
Technical details | PDF supports color models CMYK, RGB, shades of gray, and also it has its technical formats for performing the exchange of finished documents. Any file contains a description of a 2D or 3D document with all the necessary components (scan-line, vector graphics, text, and more). The extension does not encode data associated with the software or OS used to develop and view it. |
Programs | Ghostview gPDF |
Main program | Adobe Viewer |
Developer | Adobe Systems |
MIME type |