EP1079606A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Color space adjustment for multiple different substrates
Assignee: Canon Inc
•
Filing: 2000-08-10
•
Granted: —
•
Expires: 2020-08-10
Abstract
Abstract In a method and system for adjusting a color space for use with a target substrate, the color space definition has a translation table to transform colors between a device-independent coordinate system and a device-specific coordinate system. Tristimulus values of the target substrate and printing colorant (e.g., ink or toner) primaries printed on the target substrate are measured, and the color table of the color space is transformed based on color values of the color space, the measured tristimulus values of the printing colorant primaries and the measured tristimulus values of the target substrate. A memory medium storing program code for executing such method is also provided.
Inventors
- 👤 Timothy L. Kohler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033; H04N1/6097
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
85 words
A method for adjusting a color space for use with
a target substrate, the color space being defined by a
color space definition that has a translation table for use
in transforming colors between a device-independent
coordinate system and a device-specific coordinate system,
the method comprising: measuring tristimulus values of printing colorant
primaries printed on the target substrate, and transforming the translation table of the color space
based on color values in the translation table and the
measured tristimulus values of the printing colorant
primaries.
Claim 2
Dependent Claim
34 words
The method of claim 1, further comprising
measuring tristimulus values of the target substrate, wherein transforming the translation table of the
color space is based on the measured tristimulus values of
the target substrate.
Claim 3
Dependent Claim
34 words
The method of claim 1, wherein transforming the
translation table of the color space comprises modifying
hue values of the translation table in accordance with the
measured tristimulus values of the printing colorant
primaries.
Claim 4
Dependent Claim
42 words
The method of claim 1, wherein transforming the
translation table of the color space comprises lightening
color values of the translation table if the measured
tristimulus values of the printing colorant primaries are
darker than corresponding color values in the translation
table.
Claim 5
Dependent Claim
42 words
The method of claim 1, wherein transforming the
translation table of the color space comprises darkening
color values of the translation table if the measured
tristimulus values of the printing colorant primaries are
lighter than corresponding color values in the
translation table.
Claim 6
Dependent Claim
52 words
The method of claim 2, wherein the color space
definition includes a gamut description, the method
further comprising transforming the gamut description of
the color space based on hue values of the color space,
the measured tristimulus values of the printing colorant
primaries, and the measured tristimulus values of the
target substrate.
Claim 7
Dependent Claim
41 words
The method of claim 2, further comprising
deriving a gamut description from the color space based
on hue values of the color space, the measured
tristimulus values of the printing colorant primaries,
and the measured tristimulus values of the target
substrate.
Claim 8
Dependent Claim
52 words
The method of claim 1, wherein the color space
definition has a linearization table, the method further
comprising: measuring dot gain on the target substrate, and transforming the linearization table of the color
space based on a dot gain of the color space and the
measured dot gain on the target substrate.
Claim 9
Dependent Claim
44 words
The method of claim 1, wherein said transforming
step comprises creating a second table, from the
translation table, such that application of the original
transformation table to a body of color image data
followed by application of the second table, achieves the
desired transformation.
Claim 10
Dependent Claim
38 words
The method of claim 1, wherein transforming the
translation table of the color space comprises adjusting
color values of the translation table to account for
different printing processes associated with the target
substrate and the color space definition.
Claim 11
Dependent Claim
44 words
The method of claim 1, wherein the device-specific
coordinate system comprises axes corresponding
to cyan, magenta, yellow, and black printing colorants,
and the method further comprises generating color values
associated with the black axis based on the measured
tristimulus values of the target substrate.
Claim 12
Independent Claim
70 words
A method for adjusting a color space for use
with a target substrate, the color space being defined by
a color space definition that has a gamut description,
the method comprising: measuring tristimulus values of printing colorant
primaries printed on the target substrate, and transforming the gamut description of the color
space based on hue values of the color space and the
measured tristimulus values of the printing colorant
primaries.
Claim 13
Dependent Claim
34 words
The method of claim 12, further comprising
measuring tristimulus values of the target substrate, wherein transforming the gamut description of the
color space is based on the measured tristimulus values
of the target substrate.
Claim 14
Independent Claim
65 words
A method for adjusting a color space for use
with a target substrate, the color space being defined by
a color space definition that has a linearization table,
the method comprising: measuring dot gain on the target substrate, and transforming the linearization table of the color
space based on a dot gain of the color space and the
measured dot gain on the target substrate.
Claim 15
Dependent Claim
91 words
A color management system, for adjusting a
color space for use with a target substrate, the color
space being defined by a color space definition that has
a translation table for use in transforming colors
between a device-independent coordinate system and a
device-specific coordinate system, said system
comprising: means for measuring tristimulus values of printing
colorant primaries printed on the target substrate, and means for transforming the translation table of the
color space based on color values in the translation
table and the measured tristimulus values of the printing
colorant primaries.
Claim 16
Dependent Claim
41 words
The color management system of claim 15,
further comprising means for measuring tristimulus values
of the target substrate, wherein the means for transforming the translation
table of the color space operates based on the measured
tristimulus values of the target substrate.
Claim 17
Dependent Claim
35 words
The system of claim 15, wherein transformation
of the translation table of the color space comprises
modifying hue values of the translation table in
accordance with the measured tristimulus values of the
printing colorant primaries.
Claim 18
Dependent Claim
43 words
The system of claim 15, wherein transformation
of the translation table of the color space comprises
lightening color values of the translation table if the
measured tristimulus values of the printing colorant
primaries are darker than corresponding color values in
the translation table.
Claim 19
Dependent Claim
43 words
The system of claim 15, wherein transformation
of the translation table of the color space comprises
darkening color values of the translation table if the
measured tristimulus values of the printing colorant
primaries are lighter than corresponding color values in
the translation table.
Claim 20
Dependent Claim
55 words
The system of claim 16, wherein the color space
definition includes a gamut description, and said system
further comprising means for transforming the gamut
description of the color space based on hue values of the
color space, the measured tristimulus values of the
printing colorant primaries, and the measured tristimulus
values of the target substrate.
Claim 21
Dependent Claim
43 words
The system of claim 16, further comprising
means for deriving a gamut description from the color
space based on hue values of the color space, the
measured tristimulus values of the printing colorant
primaries, and the measured tristimulus values of the
target substrate.
Claim 22
Dependent Claim
40 words
The system of claim 15, wherein the means for
transforming the translation table of the color space
adjusts color values of the translation table to account
for different printing processes associated with the
target substrate and the color space definition.
Claim 23
Dependent Claim
46 words
The system of claim 15, wherein the device-specific
coordinate system comprises axes corresponding
to cyan, magenta, yellow, and black printing colorants,
and the system further comprises means for generating
color values associated with the black axis based on the
measured tristimulus values of the target substrate.
Claim 24
Dependent Claim
57 words
The system of claim 15, wherein the color space
definition has a linearization table, and said system
further comprising: means for measuring dot gain on the target
substrate, and means for transforming the linearization table of
the color space based on a dot gain of the color space
and the measured dot gain on the target substrate.
Claim 25
Dependent Claim
45 words
The system of claim 15, wherein said
transforming means is for creating a second table, from
the translation table, such that application of the
original transformation table to a body of color image
data followed by application of the second table,
achieves the desired transformation.
Claim 26
Independent Claim
74 words
A system for adjusting a color space for use
with a target substrate, the color space being defined by
a color space definition that has a gamut description,
said system comprising: means for measuring tristimulus values of printing
colorant primaries printed on the target substrate, and means for transforming the gamut description of the
color space based on hue values of the color space and
the measured tristimulus values of the printing colorant
primaries.
Claim 27
Dependent Claim
39 words
The system of claim 26, further comprising
means for measuring tristimulus values of the target
substrate, wherein the means for transforming the gamut
description of the color space operates based on the
measured tristimulus values of the target substrate.
Claim 28
Independent Claim
69 words
A system for adjusting a color space for use
with a target substrate, the color space being defined by
a color space definition that has a linearization table,
said system comprising: means for measuring dot gain on the target
substrate, and means for transforming the linearization table of
the color space based on a dot gain of the color space
and the measured dot gain on the target substrate.
Claim 29
Dependent Claim
96 words
A memory medium storing executable program code
which causes to be executed a method for adjusting a
color space for use with a target substrate, the color
space being defined by a color space definition that has
a translation table for use in transforming colors
between a device-independent coordinate system and a
device-specific coordinate system, the method comprising: measuring tristimulus values of printing colorant
primaries printed on the target substrate, and transforming the translation table of the color
space based on color values in the translation table, the
measured tristimulus values of the printing colorant
primaries.
Claim 30
Dependent Claim
34 words
The memory medium of claim 29, further
comprising measuring tristimulus values of the target
substrate, wherein transforming the translation table of the
color space is based on measured tristimulus values of
the target substrate.
Claim 31
Dependent Claim
35 words
The memory medium of claim 29, wherein
transforming the translation table of the color space
comprises modifying hue values of the translation table
in accordance with the measured tristimulus values of the
printing colorant primaries.
Claim 32
Dependent Claim
43 words
The memory medium of claim 29, wherein
transforming the translation table of the color space
comprises lightening color values of the translation
table if the measured tristimulus values of the printing
colorant primaries are darker than corresponding color
values in the translation table.
Claim 33
Dependent Claim
43 words
The memory medium of claim 29, wherein
transforming the translation table of the color space
comprises darkening color values of the translation table
if the measured tristimulus values of the printing
colorant primaries are lighter than corresponding color
values in the translation table.
Claim 34
Dependent Claim
53 words
The memory medium of claim 30, wherein the
color space definition includes a gamut description, the
method further comprising transforming the gamut
description of the color space based on hue values of the
color space, the measured tristimulus values of the
printing colorant primaries, and the measured tristimulus
values of the target substrate.
Claim 35
Dependent Claim
42 words
The memory medium of claim 30, further
comprising deriving a gamut description from the color
space based on hue values of the color space, the
measured tristimulus values of the printing colorant
primaries, and the measured tristimulus values of the
target substrate.
Claim 36
Dependent Claim
53 words
The memory medium of claim 29, wherein the
color space definition has a linearization table, the
method further comprising: measuring dot gain on the target substrate, and transforming the linearization table of the color
space based on a dot gain of the color space and the
measured dot gain on the target substrate.
Claim 37
Dependent Claim
45 words
The memory medium of claim 29, wherein said
transforming step comprises creating a second table, from
the translation table, such that application of the
original transformation table to a body of color image
data followed by application of the second table,
achieves the desired transformation.
Claim 38
Dependent Claim
39 words
The memory medium of claim 29, wherein
transforming the translation table of the color space
comprises adjusting color values of the translation table
to account for different printing processes associated
with the target substrate and the color space definition.
Claim 39
Dependent Claim
45 words
The memory medium of claim 29, wherein the
device-specific coordinate system comprises axes
corresponding to cyan, magenta, yellow, and black
printing colorants, and the medium further comprises
generating color values associated with the black axis
based on the measured tristimulus values of the target
substrate.
Claim 40
Dependent Claim
82 words
A memory medium storing executable program code
which causes to be executed a method for adjusting a
color space for use with a target substrate, the color
space being defined by a color space definition that has
a gamut description, the method comprising: measuring tristimulus values of printing colorant
primaries printed on the target substrate, and transforming the gamut description of the color
space based on hue values of the color space and the
measured tristimulus values of the printing colorant
primaries.
Claim 41
Dependent Claim
35 words
The memory medium of claim 40, further
comprising measuring tristimulus values of the target
substrate, wherein transforming the gamut description of the
color space is based on the measured tristimulus values
of the target substrate.
Claim 42
Dependent Claim
77 words
A memory medium storing executable program code
which causes to be executed a method for adjusting a
color space for use with a target substrate, the color
space being defined by a color space definition that has
a linearization table, the method comprising: measuring dot gain on the target substrate, and transforming the linearization table of the color
space based on a dot gain of the color space and the
measured dot gain on the target substrate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.