EP0178047A1
Expired / Lapsed
EP
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Colour printing data generation
Assignee: Crosfield Electronics Ltd
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Filing: 1985-08-09
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Granted: —
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Expires: 2005-08-09
Abstract
Abstract A method and apparatus for generating colour printing data is described. The apparatus comprises a scanner (5, 12) for scanning an image (2) at more than one resolution and for storing a first set of output signals. First and second stores (9, 13) store first and second three dimensional modifying means defined by respective predetermined parameters, the stores (9, 13) being arranged to receive output signals from the scanner (5) and wherein, in use, the first set of output signals is modified by the first modifying means to generate a first set of n input signals, one for each of the printing colours. A monitor (15) is arranged to receive the n input signals, if necessary after conversion to a suitable format of m input signals, from the first modifying means to display the scanned image; and user-operable control means (16) is provided for adjusting the parameters stored in the first store (13), the arrangement of the first and second modifying means being such that in use at least when the parameters defined by the first modifying means have been finally set, corresponding parameters are set in the second modifying means.
Inventors
- 👤 Brian Jordan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 05:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6011
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
A method of generating colour printing data, the method comprising (i) scanning an image at a first resolution and storing a first set of output signals; (ii) modifying the first set of output signals in accordance with parameters defining a three dimensional look-up table to generate a first set of n input signals, one for each of the printing colours; (iii) applying the n input signals, where necessary after conversion to a suitable format of m input signals, to a monitor to display the scanned image; (iv) viewing the displayed image and, if necessary, altering the parameters defining the three dimensional LUT and repeating steps (ii) to (iv) until the displayed image is satisfactory; (v) at least where the first resolution is different from a desired second resolution, rescanning the image at the second resolution, and generating a second set of output signals; and, (vi) applying the latest set of parameters defining the three dimensional LUT to the first or second set of output signals respectively to generate a second set of n input signals, one for each of the printing colours.
Claim 2
Independent Claim
182 words
A method of generating colour printing data, the method comprising (i) scanning an image at a first resolution and storing a first set of output signals; (ii) modifying the first set of output signals in accordance with parameters defining a three dimensional look-up table to generate a first set of n input signals, one for each of the printing colours; (iii) applying the n input signals, where necessary after conversion to a suitable format of m input signals, to a monitor to display the scanned image; (iv) viewing the displayed image and, if necessary, altering the parameters defining the three dimensional LUT and repeating steps (ii) to (iv) until the displayed image is satisfactory; (v) at least where the first resolution is different from a desired second resolution, rescanning the image at the second resolution, and generating a second set of output signals; and, (vi) applying the latest set of parameters defining the three dimensional LUT to the first or second set of output signals respectively to generate a second set of n input signals, one for each of the printing colours.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein the first resolution is relatively coarse compared with the second resolution.
Claim 4
Dependent Claim
177 words
Colour printing data generating apparatus comprising a scanner (5,12) for scanning an image (2) at more than one resolution and for storing a first set of output signals; first and second stores (13,9) for storing first and second three dimensional modifying means defined by respective predetermined parameters, the stores being arranged to receive output signals from the scanner (5,12) and wherein, in use, the first set of output signals is modified by the first modifying means to generate a first set of n input signals, one for each of the printing colours; a monitor (15) arranged to receive the n input signals, if necessary after conversion to a suitable format of m input signals, from the first modifying means to display the scanned image; and user-operable control means (16) for adjusting the parameters stored in the first store (13), the arrangement of the first and second modifying means being such that in use at least when the parameters defined by the first modifying means have been finally set, corresponding parameters are set in the second modifying means.
Claim 5
Dependent Claim
177 words
Colour printing data generating apparatus comprising a scanner (5,12) for scanning an image (2) at more than one resolution and for storing a first set of output signals; first and second stores (13,9) for storing first and second three dimensional modifying means defined by respective predetermined parameters, the stores being arranged to receive output signals from the scanner (5,12) and wherein, in use, the first set of output signals is modified by the first modifying means to generate a first set of n input signals, one for each of the printing colours; a monitor (15) arranged to receive the n input signals, if necessary after conversion to a suitable format of m input signals, from the first modifying means to display the scanned image; and user-operable control means (16) for adjusting the parameters stored in the first store (13), the arrangement of the first and second modifying means being such that in use at least when the parameters defined by the first modifying means have been finally set, corresponding parameters are set in the second modifying means.
Claim 6
Dependent Claim
58 words
Apparatus according to claim 3, wherein the first modifying means forms the second modifying means, the control means (16) being arranged to determine whether the output signals from the first modifying means should be applied to the monitor (15) or constitute resultant output signals for feeding to a store (11), colour separation generating means, or a retouching system.
References Cited (Backward Citations)
US4037249A
Cited
GB1540525A
Cited
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