EP0290887A2
Expired / Lapsed
EP
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Color converting method
Assignee: Sharp Corp
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Filing: 1988-04-29
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Granted: —
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Expires: 2008-04-29
Abstract
Abstract A color converting method in a color image reading apparatus operable to read image information by optically scanning a color transcript, which method comprises the steps of dividing a color space determined by light data of R, G and B into n areas, at the time light data of R, G and B obtained from light reflected from the color transcript are converted into Y (yellow), M (magenta) and C (cyan) data, which are color data for an ink, by the use of matrix coefficients; and converting the light data into color data with the use of matrix coefficients obtained by an approximate equation fixed for each area.
Inventors
- 👤 Fumikazu Nagano
- 👤 Masanori Morigami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:09
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A color converting method in a color image reading apparatus operable to read image information by optically scanning a color transcript, which method comprises the steps of: dividing a color space determined by light data of R, G and B into n areas, at the time light data of R, G and B obtained from light reflected from the color transcript are converted into Y (yellow), M (magenta) and C (cyan) data, which are color data for an ink, by the use of matrix coefficients; and converting the light data into color data with the use of matrix coefficients obtained by an approximate equation fixed for each area.
Claim 2
Dependent Claim
108 words
A color converting method in a color image reading apparatus operable to read image information by optically scanning a color transcript, which method comprises the steps of: dividing a color space determined by light data of R, G and B into n areas, at the time light data of R, G and B obtained from light reflected from the color transcript are converted into Y (yellow), M (magenta) and C (cyan) data, which are color data for an ink, by the use of matrix coefficients; and converting the light data into color data with the use of matrix coefficients obtained by an approximate equation fixed for each area.
References Cited (Backward Citations)
No citation records indexed.
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