Variable-blocksize transform coding of four-color printed images

Andre Kaup; Til Aach

doi:10.1117/12.50250

1 November 1991 Variable-blocksize transform coding of four-color printed images

Andre Kaup, Til Aach

Proceedings Volume 1605, Visual Communications and Image Processing '91: Visual Communication; (1991) https://doi.org/10.1117/12.50250
Event: Visual Communications, '91, 1991, Boston, MA, United States

Abstract

In this paper we outline a new approach to transform coding of four-color printed images employing variable blocksizes in connection with cpiadtree data structures. A new statistical model based decision criterion for guidance of the quadtree decomposition is proposed. This decision criterion avoids drawbacks of simple deviation tests or detail measures and can easily be extended towards multi-color segmentation. To account for the greatly varying local image content found in printed images, a highly adaptive threshold coding concept using an activity/entropy block classification scheme is introduced. Segmentation results as well as average compression ratios for the proposed system will be given.

Citation Download Citation

Andre Kaup and Til Aach "Variable-blocksize transform coding of four-color printed images", Proc. SPIE 1605, Visual Communications and Image Processing '91: Visual Communication, (1 November 1991); https://doi.org/10.1117/12.50250

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