Projects

Okular (KDE)

claimed by KDE

okular is an universal document viewer based on KPDF for KDE 4. Its development began as part of Google's Summer of Code program. The description of the project is located at KDE Developer's Corner. okular combines the excellent functionalities of KPDF with the versatility of ... [More] supporting different kind of documents, like PDF, Postscript, DjVu, CHM, and others. The document format handlers page has a chart describing in more detail the supported formats and the features supported in each of them. [Less]

WinDjView

WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options, based on free DjVuLibre library. MacDjView is a simple DjVu viewer for Mac OS X, also with continuous scrolling.

Read activity

The Read activity allows the XO to act as a book reader. It has a simple interface, and will view many kinds of text and image based book-like materials (PDF, Epub, PS, CBZ, etc). It will have particular strengths in handheld mode, with extremely low power consumption and simple navigation controls.

as3djvu

Flex/ActionScript DjVu Rendering Library (as3djvu)as3djvu is a library supporting decoding and rendering of DjVu files in ActionScript 3 and Flex based projects. DjVu is an excellent compression method for scanned documents which generally outperforms PDF and JPEG formats. It is a port of JavaDjVu ... [More] available here. DetailsThe library includes support for Decoding and rendering DjVu bitonal, grayscale and full color images Decoding IW44 and JB2 compressions Decodes directly from a remote URL source StatusNOT FUNCTIONING PROPERLY Rendered images are severely distorted, if rendered at all. Need to break decoding into a more asycnhronous process in order to avoid the 15 second processing timeout limitation in Flash Player 9. The current problems with the library are: Variable typing. The java code relies on specific properties of the java variable types which do not always map exactly to ActionScript. At some point, I suspect variables are loosing precision which is causing the distortions. Flash Player timeout. FP9 is single threaded. The decompression process is slow on FP9 and can exceed the 15 second timeout. If the decompression is broken into smaller chunks and executed asycnhronously with a AS3 Timer, this limit can be worked around. On the positive side, The code compiles with no errors. The code is clean. Flash Player 10. Hopefully full GPU support in FP10 will allow for faster render times. GoalsProvide component necessary for a fully Flex/Flash based DjVu viewer to make millions of pages of DjVu encoded documents available to web users without downloading a plugin. Help NeededIt would be really useful for someone with a better understanding of DjVu internals, or at least an ability to understand the DjVu whitepapers, to review the internals of the codec. Also, some expertise regarding optimizing/accelerating AS3 would be useful, too. [Less]

eyepiece

PDF and DjVu viewer for Qtopia 4 Requirements: Qtopia 4.3.x or later (not tested) Poppler PDF rendering library 0.10.3 and its dependencies DjVuLibre 3.5.21 (only libdjvulibre) Screenshots:

i-v-p-cups

CUPS backends are known to be a good way to add functionality to printer dialogues. An example is CUPS-PDF backend that allows a user to print to pdf file from any application. The problem is that CUPS does not allow its backends to be interactive. So it is difficult to ask user where to save the ... [More] output pdf file. This project is an attempt to solve the problem. The approach is as follows: new CUPS backend (ps-vprinter) prints to a ps file and place a semaphore file with the name of the ps file in a directory. A daemon which is run by a user regularly checks the semaphore file (located in tmpfs so it does not disturb hard disk) and invoke interactive virtual printers for further post-processing driven by user through dialogues. Four virtual printers can be defined in cups: interactive printer spooler gtklp and pseudo-printers for printing to pdf, djvu, and ps files. For pdf and djvu pseudo-printers when choosing an existing file for saving, it is possible to add converted material to the file. The project language is Bash shell scripts. Needed software: zenity; netpbm (>=10.21), psutils, and djvulibre for djvu pseudo-printer; pdftk for pdf pseudo-printer. [Less]

djvumonster

Project of a powerful program for creating and editing DjVu files from scanned books, documents, notes. Now in the planning stage.

tiff2djvu

Graphical program to convert scanned Tiff files to DjVu. Platform Independent. Written in Ruby, requires ImageMagick, Djvu Libre, Shoes.

windjview-subpix

Welcome!WinDjView-subpix is a high quality DjVu viewer for Windows, optimized for viewing on LCD screens. The viewer has sub-pixel rendering capability, similar to CoolType or ClearType technologies. It can render any type of material - b/w text, color text, line-art, diagrams, images etc. It is ... [More] based on WinDjView, which is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options, based on free DjVuLibre library. I'd love to hear your opinion on this software! Larry (lrrdavis0@gmail.com) Sub-pixel rendering (top: WinDjView, bottom: WinDjView-subpix) Screenshot ComparisonsSub-pixel rendering of text (top: WinDjView, bottom: WinDjView-subpix) Sub-pixel rendering of line-art (top: WinDjView, bottom: WinDjView-subpix) Installation Instructionsrun WinDjView-subpix-1.0.3-r5-Setup.exe (optional) accept it as the default viewer for DjVu files important! enable sub-pixel rendering in the settings dialog: Source CodeThe source code is available here: http://code.google.com/p/windjview-subpix/source/checkout For the curious: the major change was done in the scaling function. Instead of resampling RGB on the same grid, each color is resampled separately, with 1/3 pixel offset between the color planes. Technically, I've replicated the original resampling function 3 times (one for each color plane), each time starting with a different partial-pixel offset. Here is the diff: http://code.google.com/p/windjview-subpix/source/diff?spec=svn5&r=5&format=side&path=/trunk/Scaling.cpp [Less]

pocketdjvu

PocketDjVu - is a DjVu reader for Windows Mobile intended for easy and pleasant book reading.