Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-01-10
2006-01-10
Grant, II, Jerome (Department: 2626)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003120, C358S003130
Reexamination Certificate
active
06985259
ABSTRACT:
When one-to-one correspondence is made between each pixel of an original image and each element of a threshold matrix, a density of each pixel in an output image is represented by binary or multivalue, and a dot pattern of which the size corresponds to the threshold matrix is divided into small blocks, the threshold matrix is created such that the number of dots in each of all the blocks is made equal in all gray levels, the dot patterns in the plural blocks are made mutually the same in all the gray levels, and at a boundary of the blocks where the dot patterns are made mutually the same, the dots are increased while taking conformity of the dot patterns, or the threshold matrix is created such that order of dot increase is controlled between the blocks where the dot patterns are made mutually the same and the other blocks. Thus, the threshold matrix by which uniformity of the dot pattern is increased and a problem of texture is improved, a gray level reproduction method which uses this threshold matrix, and a gray level reproduction apparatus which uses this threshold matrix are provided.
REFERENCES:
patent: 5111310 (1992-05-01), Parker et al.
patent: 5521987 (1996-05-01), Masaki
patent: 6633412 (2003-10-01), Lin et al.
patent: 6671422 (2003-12-01), Nakanishi
patent: 2002/0071140 (2002-06-01), Suzuki et al.
patent: 963105 (1999-08-01), None
patent: 2622429 (1997-04-01), None
patent: 2000-59626 (2000-02-01), None
B.E. Bayer, “An Optimum Method For Two-Level Rendition Of Continuous-Tone Pictures”, Proceedings IEEE Int. Conf. Comm., Conference Record, pp. 26-11 to 26-15, 1973.
R.A. Ulichney, “Dithering with Blue Noise”, Proceedings of the IEEE, vol. 76, No. 1, pp. 56-79, Jan. 1988.
T. Misa, et al., “Digital halftoning technique using a blue-noise mask”, Journal Optical Society Of America, A/vol. 9, No. 11, pp. 1920-1929, Nov. 1992.
Okinaka Keiji
Suzuki Takashi
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