Articles

High quality document image compression with “DjVu”

[+] Author Affiliations
Le´on Bottou, Patrick Haffner, Paul G. Howard, Patrice Simard, Yoshua Bengio, Yann LeCun

AT&T Labs-Research, 100 Schultz Drive, Red Bank, New Jersey?07701-7033

J. Electron. Imaging. 7(3), 410-425 (Jul 01, 1998). doi:10.1117/1.482609
History: Received Dec. 4, 1997; Revised May 3, 1998; Accepted May 6, 1998
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Abstract

We present a new image compression technique called “DjVu” that is specifically geared towards the compression of high-resolution, high-quality images of scanned documents in color. This enables fast transmission of document images over low-speed connections, while faithfully reproducing the visual aspect of the document, including color, fonts, pictures, and paper texture. The DjVu compressor separates the text and drawings, which need a high spatial resolution, from the pictures and backgrounds, which are smoother and can be coded at a lower spatial resolution. Then, several novel techniques are used to maximize the compression ratio: the bi-level foreground image is encoded with AT&T’s proposal to the new JBIG2 fax standard, and a new wavelet-based compression method is used for the backgrounds and pictures. Both techniques use a new adaptive binary arithmetic coder called the ZP-coder. A typical magazine page in color at 300 dpi (dots per inch) can be compressed down to between 40 and 60 kbytes, approximately 5–10 times better than JPEG for a similar level of subjective quality. A real-time, memory efficient version of the decoder was implemented, and is available as a plug-in for popular web browsers. © 1998 SPIE and IS&T.

© 1998 SPIE and IS&T

Citation

Le´on Bottou ; Patrick Haffner ; Paul G. Howard ; Patrice Simard ; Yoshua Bengio, et al.
"High quality document image compression with “DjVu”", J. Electron. Imaging. 7(3), 410-425 (Jul 01, 1998). ; http://dx.doi.org/10.1117/1.482609


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