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DjVu versus Pdf

As quoted from Wikipedia, DjVu is a computer file format designed primarily to store scanned images, especially those containing text and line drawings. 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 for high quality, readable images to be stored in a minimum of space, so that they can be made available on the web.

The primary difference between DjVu and PDF is that DjVu is a raster format, whereas PDF is primarily a vector format. has a very good open source viewer available for DjVu files.

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