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EP0454276A2
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Method for multiplying screening frequency in an electronic half-tone screening process
Assignee: Bayer Corp
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Filing: 1991-04-24
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Granted: —
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Expires: 2011-04-24
Abstract
Abstract A method for multiplying screen frequency in an electronic half-tone screening process is disclosed. The X and Y-coordinate values are determined for each X-Y coordinate element in at least one matrix of the screening function period. A modulo operation is performed on both the X-coordinate value x and the Y-coordinate value y according to: and .
Inventors
- 👤 Paul A. Delabastita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:02
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/405; H04N1/4055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A method for multiplying screen frequency in an electronic half-tone screening process having a screen function period with at least one matrix of X-Y coordinate elements, said method comprising the steps of: A. determining the X-coordinate values of a plurality of X-Y coordinate elements in said at least one matrix of the screen function period; B. determining the Y-coordinate values of a plurality of X-Y coordinate elements in said at least one matrix of the screen function period; C. performing a modulo operation on the X-coordinate value x of each X-Y coordinate element according to: x(m * x + K r , D r ) - K r where m is an integer, K r is a rounding constant and D r is a domain range; D. performing a modulo operation on the Y-coordinate value y of each X-Y coordinate element according to: y(m * x + K r , D r ) - K r where m is an integer, K r is a rounding constant and D r is a domain range.
Claim 2
Independent Claim
115 words
A method for multiplying screen frequency in an electronic half-tone screening process having a screen function period with at least one matrix of X-Y coordinate elements, said method comprising the steps of: A. determining the X-coordinate values of a plurality of X-Y coordinate elements in said at least one matrix of the screen function period; B. determining the Y-coordinate values of a plurality of X-Y coordinate elements in said at least one matrix of the screen function period; C. performing a modulo operation on the X-coordinate value x of each X-Y coordinate element according to: ; and, D. performing a modulo operation on the Y-coordinate value y of each X-Y coordinate element according to: .
References Cited (Backward Citations)
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