IMAGE COMPRESSION

Progressive coding of error-diffused bilevel images

[+] Author Affiliations
Chul Soo Lee, Hyun Wook Park

Korea Advanced Institute of Science and Technology, Department of Electrical Engineering, 373-1 Guseong-dong, Yuseong-gu, Daejeon?305-701, Korea E-mail: hwpark@athena.kaist.ac.kr

J. Electron. Imaging. 12(1), 173-178 (Jan 01, 2003). doi:10.1117/1.1525794
History: Received Apr. 17, 2002; Revised Aug. 14, 2002; Accepted Aug. 20, 2002; Online January 29, 2003
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We propose a new method to compress error-diffused bilevel images with resolution scalability. This method is a combination of inverse halftoning and rehalftoning. For the inverse halftoning, we combine 2×2 dots into a single pixel of a resolution-reduced image, where each pixel has a multilevel value of 0, 1, 2, 3, and 4. After the inverse halftoning, the resolution-reduced multilevel image is halftoned by using an error diffusion algorithm. Thus, the resolution of the error-diffused bilevel images can be reduced by repetition of the inverse halftoning and rehalftoning processes. After reducing the image size, we encode an error-diffused bilevel image progressively from the lowest resolution image to the highest resolution image. To encode higher resolution images, we use the information in the previously coded lower resolution image. Though the compression ratios of the proposed algorithm are similar to those of progressive Joint Bilevel Image Processing Group (JBIG), the image quality of the resolution-reduced image from the proposed algorithm is much better than that from the progressive JBIG. © 2003 SPIE and IS&T.

© 2003 SPIE and IS&T

Citation

Chul Soo Lee and Hyun Wook Park
"Progressive coding of error-diffused bilevel images", J. Electron. Imaging. 12(1), 173-178 (Jan 01, 2003). ; http://dx.doi.org/10.1117/1.1525794


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