US6999617B1
Expired / Lapsed
US
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Image processing method and apparatus
Assignee: Canon Inc
•
Filing: 1999-07-22
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Granted: 2006-02-14
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Expires: 2019-07-22
Abstract
Abstract If one gamut mapping (hue restoration) defined by the Lab color space is applied in color matching under different reference white points, the human vision perceives the hue as inconsistent. In view of this, input data which is dependent on a color space of an input device is converted by the conversion LUT 11 to color space data which is independent of any devices, based on a viewing condition at the time of viewing an input original. The data is converted to data in the human color perception space by the forward converter 12 , then subjected to gamut mapping, and converted back to data in the color space independent of any devices by the inverse converter 15 , based on a viewing condition at the time of viewing an output original. Then, the data is converted to output data in a color space which is dependent on an output device by the conversion LUT 16.
Inventors
- 👤 Manabu Ohga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:02
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6083; H04N1/6088; G; G06; G06T; G06T11/00; G06T11/10; H04N1/6086
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
84 words
An image processing method comprising the steps of: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and conjecturing colorimetric data depending on the input viewing condition from the selected set of colorimetric data.
Claim 2
Dependent Claim
84 words
An image processing method comprising the steps of: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and conjecturing colorimetric data depending on the input viewing condition from the selected set of colorimetric data.
Claim 3
Dependent Claim
29 words
The method according to claim 1 , further comprising the step of caching the conjectured colorimetric data to a profile which stores the plurality of sets of colorimetric data.
Claim 4
Dependent Claim
24 words
The method according to claim 1 , further comprising the step of generating conversion data for color matching based on the conjectured colorimetric data.
Claim 5
Dependent Claim
45 words
The method according to claim 1 , wherein said comparing step includes selecting colorimetric data by comparing a chromaticity of a light source designated by the input viewing condition with chromaticities of the plurality of light sources to which the sets of colorimetric data correspond.
Claim 6
Dependent Claim
44 words
The method according to claim 1 , wherein said comparing step includes selecting colorimetric data by comparing a color temperature of a light source designated by the input viewing condition with color temperatures of the plurality to which the sets of colorimetric data correspond.
Claim 7
Dependent Claim
27 words
The method according to claim 1 , wherein said conjecturing step includes conjecturing colorimetric data corresponding to the input viewing condition by using a color appearance model.
Claim 8
Dependent Claim
37 words
The method according to claim 1 , wherein the conjectured colorimetric data is cached to another profile different from a profile which stores the plurality of sets of colorimetric data in correspondence with the input viewing condition.
Claim 9
Dependent Claim
87 words
An image processing method comprising the steps of: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and generating data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 10
Dependent Claim
87 words
An image processing method comprising the steps of: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and generating data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 11
Dependent Claim
28 words
The method according to claim 8 , further comprising the step of caching the generated data to a profile which stores the plurality of sets of colorimetric data.
Claim 12
Dependent Claim
45 words
The method according to claim 8 , wherein said comparing step includes selecting colorimetric data by comparing a chromaticity of a light source designated by the input viewing condition with chromaticities of the plurality of light sources to which the sets of colorimetric data correspond.
Claim 13
Dependent Claim
47 words
The method according to claim 8 , wherein said comparing step includes selecting colorimetric data by comparing a color temperature of a light source designated by the input viewing condition with color temperatures of the plurality of light sources to which the sets of colorimetric data correspond.
Claim 14
Dependent Claim
61 words
The method according to claim 8 , wherein said generating step further comprises the steps of: conjecturing a set of colorimetric data depending on the input viewing condition from the selected set of colorimetric data by using a color appearance model; and generating the data for color matching corresponding to the input viewing condition from the conjectured set of colorimetric data.
Claim 15
Dependent Claim
36 words
The method according to claim 8 , wherein the generated data is cached to another profile different from a profile which stores the plurality of sets of colorimetric data in correspondence with the input viewing condition.
Claim 16
Dependent Claim
101 words
An image processing apparatus comprising: an obtaining section, arranged to obtain a plurality of sets of colorimetric data which correspond to respective light sources; an inputting section, arranged to input a viewing condition; a selector, arranged to select a set of colorimetric data corresponding to a light source, which has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data in accordance with comparison between the input viewing condition and condition of the light sources; and a conjecturing section, arranged to conjecture colorimetric data depending on the input viewing condition from the selected colorimetric data.
Claim 17
Dependent Claim
101 words
An image processing apparatus comprising: an obtaining section, arranged to obtain a plurality of sets of colorimetric data which correspond to respective light sources; an inputting section, arranged to input a viewing condition; a selector, arranged to select a set of colorimetric data corresponding to a light source, which has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data in accordance with comparison between the input viewing condition and condition of the light sources; and a conjecturing section, arranged to conjecture colorimetric data depending on the input viewing condition from the selected colorimetric data.
Claim 18
Dependent Claim
30 words
The apparatus according to claim 14 , further comprising a cache arranged to cache the conjectured colorimetric data to a profile which stores the plurality of sets of colorimetric data.
Claim 19
Dependent Claim
108 words
An image processing apparatus comprising: an obtaining section, arranged to obtain a profile having a plurality of sets of colorimetric data which correspond to respective light sources; an inputting section, arranged to input a viewing condition; a selector, arranged to select a set of colorimetric data corresponding to a light source, which has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data in accordance with comparison between the input viewing condition and conditions of the light sources; and a generator, arranged to generate data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 20
Dependent Claim
108 words
An image processing apparatus comprising: an obtaining section, arranged to obtain a profile having a plurality of sets of colorimetric data which correspond to respective light sources; an inputting section, arranged to input a viewing condition; a selector, arranged to select a set of colorimetric data corresponding to a light source, which has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data in accordance with comparison between the input viewing condition and conditions of the light sources; and a generator, arranged to generate data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 21
Dependent Claim
30 words
The apparatus according to claim 16 , further comprising a caching section arranged to cache the generated data to a profile which stores the plurality of sets of colorimetric data.
Claim 22
Dependent Claim
101 words
A computer program product storing a computer readable medium having computer program codes, for an image processing method, said product comprising process procedure codes for: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and conjecturing colorimetric data depending on the input viewing condition from the selected set of colorimetric data.
Claim 23
Dependent Claim
101 words
A computer program product storing a computer readable medium having computer program codes, for an image processing method, said product comprising process procedure codes for: obtaining a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and conjecturing colorimetric data depending on the input viewing condition from the selected set of colorimetric data.
Claim 24
Dependent Claim
31 words
The product according to claim 18 , further comprising caching process procedure code for caching the conjectured colorimetric data to a profile which stores the plurality of sets of colorimetric data.
Claim 25
Dependent Claim
120 words
A computer program product storing a computer readable medium having computer program codes, for an image processing method performing color process on input image data based on a color appearance model, said product comprising process procedure codes for: obtaining a profile having a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and generating data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 26
Dependent Claim
120 words
A computer program product storing a computer readable medium having computer program codes, for an image processing method performing color process on input image data based on a color appearance model, said product comprising process procedure codes for: obtaining a profile having a plurality of sets of colorimetric data which correspond to respective light sources; inputting a viewing condition; comparing the input viewing condition with conditions of the light sources to select a set of colorimetric data corresponding to a light source that has a condition similar to the input viewing condition, from the plurality of sets of colorimetric data; and generating data for color matching corresponding to the input viewing condition based on the selected set of colorimetric data.
Claim 27
Dependent Claim
30 words
The product according to claim 20 , further comprising caching process procedure code for caching the generated data to a profile which stores the plurality of sets of colorimetric data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-02-13 | 2009-08-15 | 2010-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-02-13 | 2013-08-15 | 2014-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-02-13 | 2017-08-15 | 2018-02-14 | $7700.00 | Window Closed / Lapsed |