EP1307042A2
Expired / Lapsed
EP
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Method and system for management of color through conversion between color spaces
Assignee: HP Inc
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Filing: 2002-10-10
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Granted: —
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Expires: 2022-10-10
Abstract
Abstract A method of mapping a color produced by an image device (10) in a presentation color space to a destination color space including steps of receiving (110) the color (12) from the image device (10), determining (112) if color (12) is to be preserved, converting (114) the color (12) to the destination color space using a default profile if it is determined that color is to be preserved, and converting (116) the color (12) to the destination color space using a device-specific profile absent a determination that color is to be preserved.
Inventors
- 👤 Huanzhao Zeng
- 👤 Kevin R. Hudson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:56
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A storage medium readable by a computer, having embodied therein
a program of instructions executable by the computer to perform the steps of: receiving (110) a color (12) in a presentation color space from an image
device (10); determining (112) whether color (12) is to be preserved; converting (114) the color (12) to a destination color space using a default
profile if it is determined that color is to be preserved; and converting (116) the color (12) to the destination color space using a device-specific
profile absent a determination that color is to be preserved.
Claim 2
Dependent Claim
116 words
A storage medium readable by a computer, having embodied therein
a program of instructions executable by the computer to perform the steps of: receiving (210) an initial-formatted color (12) in a presentation color space
from an image device (10); converting (212) the initial-format color (12) from the presentation color space
to a destination color space using a device-specific profile to produce a device-formatted
color (28); converting (214) the initial-formatted color (12) from the presentation color
space to the destination color space using a default profile to produce a default-formatted
color (30); and producing (218) a resultant color (36) in the destination color space by
weighted combination of the device-formatted color (28) with the default-formatted
color (30).
Claim 3
Dependent Claim
27 words
The storage medium of claims 1 or 2, wherein the program of
instructions further includes the step of receiving the device-specific profile from the
image device (10).
Claim 4
Dependent Claim
31 words
The storage medium of claim 2, wherein weighted combination of the
device-formatted color (28) with the default-formatted color (30) includes weighting
the device-formatted color (28) relative to the default-formatted color (30).
Claim 5
Dependent Claim
37 words
The storage medium of claim 2, wherein weighted combination of the
device-formatted color (28) with the default-formatted color (30) involves weighting
the device-formatted color (28) and the default-formatted color (30) based on
proximity to a to-be-preserved color.
Claim 6
Dependent Claim
23 words
The storage medium of claim 5, wherein proximity to the to-be-preserved
color is determined based on hue angle of the initial-formatted color (12).
Claim 7
Dependent Claim
70 words
The storage medium of claim 2, wherein weighted combination of the
device-formatted color (28) with the default-formatted color (30) is accomplished in
accordance with the equation: C * [X,Y,Z] DEVICE + (1-C) * [X,Y,Z] DEFAULT => [X,Y,Z] RESULTANT wherein c is a weighting factor, and wherein [X,Y,Z] DEVICE is the device-formatted
color (28), wherein [X,Y,Z] DEFAULT is the default-formatted color (30), and wherein
[X,Y,Z] RESULTANT is the resultant color (40).
Claim 8
Dependent Claim
14 words
The storage medium of claim 7, wherein combination of c and (1-c)
produce unity.
Claim 9
Dependent Claim
112 words
A storage medium readable by a computer, having embodied therein a
program of instructions executable by the computer to perform the steps of: receiving (310) a source image including colors defined in the presentation
color space; converting (312) the source image from the presentation color space to an
intermediate color space in accordance with a conversion function which
accommodates preservation of one or more colors to produce a color-preserved
image; converting (314) the color-preserved image back from the intermediate color
space to the presentation color space to produce a color-preserved image in the
presentation color space; and converting (316) the color-preserved image from the presentation color space
to the printing color space.
Claim 10
Dependent Claim
188 words
A color management system (5) comprising: an image device (10) configured to present an initial-formatted color image
(12) defined in a presentation color space; a print processor (20) configured to receive the initial-formatted color
image (12) from the image device (10), to convert the initial-formatted color
image (12) from the presentation color space to a destination color space using a
device-specific profile to produce a device-formatted color image (28), to convert
the initial-formatted color image from the presentation color space to the
destination color space using a default profile to produce a default-formatted
color image (30), to produce a resultant color image (36) in the destination color
space by weighted combination of the device-formatted color image (28) with the
default-formatted color image (30), to convert the resultant color image (30) from
the destination color space to the presentation color space to produce a color-preserved
color image (40) in the presentation color space, and to convert the
color-preserved color image (40) from the presentation color space to a printing
color space; and a print engine (50) configured to print the color-preserved color image (44) in
the printing color space.
References Cited (Backward Citations)
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