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EP0497325A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for determining amounts of UCR and image processing apparatus

Assignee: Fujifilm Holdings Corp
•
Filing: 1992-01-29
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Granted: —
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Expires: 2012-01-29
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Abstract

Abstract UCR (under color removal) amount is determined, which can satisfy printing conditions as desired easily and within short time. Gray balance for Y, M and C is inputted from input means 13. A control means 9 interpolates the inputted gray balance as necessary and instructs a test pattern generator 12 and an output unit 7 to output a test pattern so that matrix is formed by Y, M, C and K. Based on the outputted test pattern, a print plate is prepared, and a sample of matrix is prepared by 4-plate overlapping printing. Each density of matrix is measured, and said measured density value is inputted from the input means 13. The control unit 9 incorporates each density and calculates the amount of UCR, which satisfies the input gray balance from interrelation of the density of Y, M, C and K of the matrix.

Inventors

  • 👤 Seiichiro C/O Fuji Photo Film Co. Ltd. Morikawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 13:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6077; H04N1/6016; H04N1/6022; H04N1/603; H04N1/6033

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 53 words
A method for determining amount of UCR (under color removal), characterized in that a test pattern is prepared according to gray balance set at a predetermined step, a density of a matrix of a predetermined size is obtained by printing said test pattern, and UCR amount is determined according to said measured density.
Claim 2
Dependent Claim 21 words
A method for determining amount of UCR according to Claim 1, wherein said gray balance comprises at least a highlight point.
Claim 3
Dependent Claim 21 words
A method for determining amount of UCR according to Claim 1, wherein said gray balance comprises at least a shadow point.
Claim 4
Dependent Claim 32 words
A method for determining amount of UCR according to Claim 1, wherein said test pattern comprises at least a pattern where all of dot percentage of yellow, magenta and cyan are 0.
Claim 5
Dependent Claim 27 words
A method for determining amount of UCR according to Claim 1, wherein said test pattern comprises at least a pattern where dot percentage of black is 0.
Claim 6
Dependent Claim 27 words
A method for determining amount of UCR according to Claim 1, wherein said test pattern comprises at least a pattern where dot percentage of black is 100.
Claim 7
Dependent Claim 26 words
A method for determining amount of UCR according to Claim 1, wherein said determined UCR amount is set as a table in an image processing apparatus.
Claim 8
Dependent Claim 54 words
An image processing apparatus, comprising input means, output means and control means, said output means outputs a test pattern according to a gray balance set by said input means, and said control means determines UCR amount based on measured density of a matrix obtained by printing said test pattern inputted from said input means.
Claim 9
Dependent Claim 18 words
An image processing apparatus according to Claim 8, wherein said gray balance comprises at least a highlight point.
Claim 10
Dependent Claim 18 words
An image processing apparatus according to Claim 8, wherein said gray balance comprises at least a shadow point.
Claim 11
Dependent Claim 29 words
An image processing apparatus according to Claim 8, wherein said test pattern comprises at least a pattern where all of dot percentage of yellow, magenta and cyan are 0.
Claim 12
Dependent Claim 24 words
An image processing apparatus according to Claim 8, wherein said test pattern comprises at least a pattern where dot percentage of black is 0.
Claim 13
Dependent Claim 24 words
An image processing apparatus according to Claim 8, wherein said test pattern comprises at least a pattern where dot percentage of black is 100.
Claim 14
Dependent Claim 23 words
An image processing apparatus according to Claim 8, wherein said determined UCR amount is set as a table in an image processing apparatus.

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