Start create DjVu with Caminova Products Get DjView Desktop Application ( Commercial – Sharp Zaurus); SmartDjVu (Commercial – Pocket PC/Windows CE) . Document Express with DjVu Desktop Edition is the solution for Desktop, low- volume DjVu-conversion needs. It includes Document Express Editor. DjVu is a computer file format designed primarily to store scanned documents, especially those .. (maintained by an anonymous webmaster); djvu. com (“DjVu Universe”) (Caminova Corporation); Cuminas Corporation – Software .
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Over 90 percent of the information in the world is still on paper. And almost none of that rich content is on the Internet.
Convert DjVu to PDF
ro That’s because scanning such documents and getting them onto a Web site has been problematic at best. At the high resolution necessary to ensure the readability of the text and to preserve the quality of the images, file sizes become far too bulky for acceptable download speed.
Reducing resolution to achieve satisfactory download speed means forfeiting quality and legibility. As a result, Web site content developers have been largely unable yo leverage existing printed materials.
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DjVu allows the distribution on the Internet of very high resolution images of scanned documents, digital documents, and photographs. DjVu allows content developers to scan high-resolution color pages of books, magazines, catalogs, manuals, newspapers,historical or ancient documents, and make them available on the Web. Information that was previously trapped in hard copy form can now be made available to wide audience.
Research institutions, libraries, and government agencies can give access to their archives. Companies can distribute internal documents on their intranets. The developing and distribution of DjVu technology is now handled by Cuminas corporation.
DjVu is an open standard. The file format specification, as well as an open source implementations of the decoder and part of the encoder are available. This puts the size of high-quality scanned pages within the realm of an average HTML page which is typically around 50KB.
For color document images that contain both text and pictures, DjVu files are typically 5 to 10 times smaller than JPEG at similar quality.
DjVu files are also about 3 to 8 times smaller than black and white PDF files produced from scanned documents scanned documents in color are impractical in PDF.
The DjVu plug-in is available for standard Web browsers on various platforms. The DjVu plug-in allows for easy panning and zooming of document images. Conventional image viewing software decompresses images in their entirety before displaying them. This is impractical for high-resolution document images since they typically go beyond the memory capacity of many PCs, causing excessive disk swapping.
DjVu, on the other hand, never decompresses the entire image, but instead keeps the image in memory in a compact form, and decompresses the piece displayed on the screen in real time as the user views the image. Images as large as 2, pixels by 3, pixels a standard page image at DPI can be downloaded and displayed on very low-end PCs. The DjVu format is progressive. Users get an initial version of the page very quickly, and the visual quality of the page progressively improves as more bits arrive.
DjVu – Wikipedia
For example, the text of a typical magazine page would appear in just three seconds over a 56Kbps modem connection. In another second or two, the first versions of the pictures and backgrounds will appear. Then, after a few more seconds, the final full-quality version of the page is completed.
One of the main technologies behind DjVu is the ability to separate an image into a background layer i. Traditional image compression techniques are fine for simple photographs, but they drastically degrade sharp color transitions between adjacent highly contrasted areas – which is why they render type so poorly. By separating the text from the backgrounds, DjVu can keep the text at high resolution thereby preserving the sharp edges and maximizing legibilitywhile at the same time compressing the backgrounds and pictures at lower resolution with a wavelet-based compression technique.
DjVu is used by many commercial and non-commercial web sites on the Web today.