Multicell clustered mask with blue noise adjustments

Details Multicell clustered mask with blue noise adjustments Multicell clustered mask with blue noise adjustments

1997-08-12

2000-02-15

Rogers, Scott

Facsimile and static presentation processing

Static presentation processing

Attribute control

382237, 382270, 358457, 358466, 358298, G06K 1502, H04N 1405

Patent

active

060259302

ABSTRACT:
A technique which combines the advantages of blue noise and clustering obtains more pleasant "blueish" effects in the rendering of the grey levels for which the original multicell mask generates unwanted periodic representations. Such original multicell clustered dither array patterns which are undesirable are replaced by less periodic ones while preserving all benefits of the classical methods, and in particular, leaving the nicest patterns unchanged. An automated process redistributes the locations of the threshold values corresponding to undesirable grey levels to obtain more pleasant "blueish" effects in the rendering of the grey levels.

REFERENCES:
patent: 5111310 (1992-05-01), Parker et al.
patent: 5341228 (1994-08-01), Parker et al.
Robert Ulichney, "The void-and-cluster method for dither array generation", Digital Equipment Corporation, SPIE vol. 1913, pp. 332-343, Sep. 1993.
Meng Yao et al., "Modified approach to the construction of a blue noise mask", Journal of Electronic Imaging 3 (1), pp. 92-97, Jan. 1994.
Robert A. Ulichney, "Dithering with Blue Noise", Proceeding of the IEEE, vol. 76, No. 1, pp. 57-79, Jan. 1988.

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