Methods, devices and systems for compressing images

Details Methods, devices and systems for compressing images Methods, devices and systems for compressing images

2007-07-17

2007-07-17

Dang, Duy M. (Department: 2624)

Image analysis

Image compression or coding

Lossless compression

C382S237000, C358S003130

Reexamination Certificate

active

10292163

ABSTRACT:
Methods, devices and systems for compressing images are provided. One method includes creating halftone mask structures and applying compression coding techniques to arrayed pixels sorted using the halftone mask structures in order to convert an image to a compressed bi-level, halftoned image.

REFERENCES:
patent: 5555103 (1996-09-01), Anderson
patent: 6330362 (2001-12-01), Venkateswar
Kang, Henry R., “Dispersed-Dot Ordered Dither”, Digital Color Halftoning, E.R. Dougherty, ed., International Society of Optical Engineering and Institute of Electrical and Electronics Engineers, Inc., pp. 279-294 (1999).
Sayood, Kahlid, “Huffman Coding”, Introduction to Data Compression, 2nd Ed., Fox, E., Ed., Morgan Kaufmann Publishers, pp. 39-54 (2000).
Ulichney, Robert, “Dispersed-Dot Ordered Dither”, Digital Halftoning, The Massachusettes Institute of Technology, pp. 127-142 (1987).
Denecker, Koen, et al., “A Comperative Sudy of Lossless Coding Techniques for Screened Continuous-Tone Images”, (4 pages), Pubulished 1997.
Denecker, Koen, et al., “Software and Hardware Implementation of an Improved Lossless Haiftone Image Compression Algorithm”, (4 pages), Published 1998.
Denecker, Koen, et al., “Design of an Improved Lossless Halftone Image Compression Codec” Signal Processing: Image Communication 17 pp. 277-292 (2002).

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