US6268930B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for judging whether color data is within a gamut of an output device
Assignee: Canon Inc
•
Filing: 1994-09-29
•
Granted: 2001-07-31
•
Expires: 2014-09-29
Abstract
Abstract A color image processing system includes storage of plural specific color data representing a gamut of an output device and judgment of whether input color image data is within the gamut of the output device, the judgment performed based on a positional relationship among a plane defined by the plural specific color data, predetermined color data within the gamut of the output device, and the input color image data.
Inventors
- 👤 Kenichi Ohta
- 👤 Manabu Ohga
- 👤 Takashi Yabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:54
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058; H04N1/603; H04N1/6033
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
105 words
A color image processing apparatus comprising: storing means for storing plural color data representing a gamut of an output device; and judging means for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging means judges that the input image data is within the gamut of the output device.
Claim 2
Dependent Claim
105 words
A color image processing apparatus comprising: storing means for storing plural color data representing a gamut of an output device; and judging means for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging means judges that the input image data is within the gamut of the output device.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1 , wherein said plural specific color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 4
Dependent Claim
33 words
An apparatus according to claim 1 , further comprising output device designation means for designating one of plural output devices for which plural specific color data representing a gamut is to be stored.
Claim 5
Dependent Claim
38 words
An apparatus according to claim 2 , wherein the plane is defined by three points in the plural specific color data stored in the storing means, and the gamut of the output device is represented by a dodecahedron.
Claim 6
Dependent Claim
45 words
An apparatus according to claim 1 , further comprising gamut mapping means for mapping the input color data into the gamut of the output device, the gamut mapping means mapping the input color data on the basis of a judgment result of the judging means.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 1 , wherein the predetermined color data corresponds to color data on a luminance axis.
Claim 8
Dependent Claim
28 words
A color image processing apparatus according to claim 1 , wherein said output device comprises a head which outputs liquid droplets by film boiling induced by thermal energy.
Claim 9
Dependent Claim
125 words
A color image processing apparatus comprising: storing means for storing plural color data representing a gamut of an output device; and judging means for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging means judges that the input image data is within the gamut of the output device, and wherein the plural color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 10
Dependent Claim
125 words
A color image processing apparatus comprising: storing means for storing plural color data representing a gamut of an output device; and judging means for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging means judges that the input image data is within the gamut of the output device, and wherein the plural color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 11
Dependent Claim
34 words
An apparatus according to claim 8 , wherein the plural specific color data stored in said storing means is set on the basis of a recording material which is used in the output device.
Claim 12
Dependent Claim
19 words
An apparatus according to claim 8 , wherein the predetermined color data comprises color data on a luminance axis.
Claim 13
Dependent Claim
107 words
A color image processing method comprising: a storing step for storing plural color data representing a gamut of an output device; and a judging step for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging step judges that the input image data is within the gamut of the output device.
Claim 14
Dependent Claim
107 words
A color image processing method comprising: a storing step for storing plural color data representing a gamut of an output device; and a judging step for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging step judges that the input image data is within the gamut of the output device.
Claim 15
Dependent Claim
27 words
A method according to claim 11 , wherein said plural specific color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 16
Dependent Claim
34 words
A method according to claim 11 , further comprising an output device designation step for designating one of plural output devices for which plural specific color data representing a gamut is to be stored.
Claim 17
Dependent Claim
38 words
A method according to claim 12 , wherein the plane is defined by three points in the plural specific color data stored in the storing step, and the gamut of the output device is represented by a dodecahedron.
Claim 18
Dependent Claim
46 words
A method according to claim 13 , further comprising a gamut mapping step for mapping the input color data into the gamut of the output device, the gamut mapping step mapping the input color data on the basis of a judgment result of the judging step.
Claim 19
Dependent Claim
20 words
A method according to claim 11 , wherein the predetermined color data corresponds to color data on a luminance axis.
Claim 20
Dependent Claim
127 words
A color image processing method comprising: a storing step for storing plural color data representing a gamut of an output device; and a judging step for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging step judges that the input image data is within the gamut of the output device, and wherein the plural color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 21
Dependent Claim
127 words
A color image processing method comprising: a storing step for storing plural color data representing a gamut of an output device; and a judging step for judging whether input color data exists on the same side as that of predetermined color data within the gamut of the output device, with respect to a triangular plane defined by three color data of the plural color data, wherein, when the input color data exists on the same side as that of the predetermined color data within the gamut of the output device, said judging step judges that the input image data is within the gamut of the output device, and wherein the plural color data comprises primary color data, secondary color data, white color data and dark color data.
Claim 22
Dependent Claim
34 words
A method according to claim 17 , wherein the plural specific color data stored in said storing step is set on the basis of a recording material which is used in the output device.
Claim 23
Dependent Claim
19 words
A method according to claim 17 , wherein the predetermined color data comprises color data on a luminance axis.
References Cited (Backward Citations)
US4731662A
Cited
US5241373A
Cited
US5594558A
Cited
EP0486311A2
Cited
US5317426A
Cited
EP0488656A2
Cited
EP0494034A2
Cited
US5185661A
Cited
US5659406A
Cited
US5909291A
Cited
US5657068A
Cited
US5377024A
Cited
US5510910A
Cited
US5448379A
Cited
US5299291A
Cited
US5583666A
Cited
US5519515A
Cited
US5398120A
Cited
US5596428A
Cited
US5724442A
Cited
US5450216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-07-30 | 2005-01-29 | 2005-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-30 | 2009-01-29 | 2009-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-30 | 2013-01-29 | 2013-07-31 | $7700.00 | Window Closed / Lapsed |