Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1986-07-24
1988-07-19
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 78, H04N 146
Patent
active
047588861
ABSTRACT:
Selecting proper half-tone screen systems for use with raster scanned images ensures the absence of Moire effects when using two or more color separations. Mathematical analysis provides an ensemble of screen patterns which are based on an odd/even relationship between the number of screen "lines" per repeat cell distance for combinations of screens. From this ensemble a critical selection is made of suitable screen parameters for the chosen font(s) using computer integration over repeat cell areas to show which chosen screens give invariance of white fraction with off-set distance in the two directions (horizontal and vertical). This comparison is carried out between all pairs of the required number of screens to be used.
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Bauer Robert M.
Groody James J.
Litman Mark A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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