Dither matrix producing method and apparatus, image...

Details Dither matrix producing method and apparatus, image... Dither matrix producing method and apparatus, image...

2004-12-02

2010-06-29

Tran, Douglas Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003140

Reexamination Certificate

active

07746502

ABSTRACT:
A main vector: m^=(mx, my) and a sub-vector: s^=(sx, sy) determining cyclic structure of a basic matrix are defined, and a positional vector for a pixel configuring the basic matrix Pi^=(Pix, Piy) is defined, where the suffix i denotes an i-th pixel configuring the basic matrix. Then, the pixels configuring the basic matrix are arranged in such a manner as to satisfy the cyclic structure, and transformation of Pi^→Pi^+km^+ls^ is carried out where k and l are arbitrary integers, and may be negative values. Then a new shape of the basic matrix is obtained with Pi^+km^+ls^ as a new pixel positional vector Pi^.

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Kawamura, Naoto, “Image Processing for Halftone Reproduction” paper of Electronic Photograph Society, vol. 24, No. 1, 1985, pp. 51-59 and English translation (30 pp. total).

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