US6041136A
Expired / Lapsed
US
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Image processing apparatus and method
Assignee: Canon Inc
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Filing: 1996-03-28
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Granted: 2000-03-21
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Expires: 2016-03-28
Abstract
Abstract An image processor includes an input device which inputs image data representing an image, and a judgement device judges a color distribution of the image on the basis of the input image data. A generation device generates a color mapping condition, on the basis of a combination condition of linear mapping and non-linear mapping according to the judged color distribution, and a processor performs a color mapping process by using the generated color mapping condition.
Inventors
- 👤 Manabu Ohga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:22
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
An image processing apparatus comprising: input means for inputting image data representing an image; judgement means for judging a color distribution of the image on the basis of the input image data; generation means for generating a color mapping condition so as not to appear discontinuous in a combined portion of linear mapping and non-linear mapping, on the basis of a combination condition of linear mapping and non-linear mapping according to the judged color distribution; and process means for performing a color mapping process by using the generated color mapping condition.
Claim 2
Dependent Claim
91 words
An image processing apparatus comprising: input means for inputting image data representing an image; judgement means for judging a color distribution of the image on the basis of the input image data; generation means for generating a color mapping condition so as not to appear discontinuous in a combined portion of linear mapping and non-linear mapping, on the basis of a combination condition of linear mapping and non-linear mapping according to the judged color distribution; and process means for performing a color mapping process by using the generated color mapping condition.
Claim 3
Dependent Claim
37 words
An apparatus according to claim 1, wherein said generation means controls a mapping boundary as a boundary between a linear mapping range to excite said linear mapping and a non-linear mapping range to perform said non-linear mapping.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2, wherein said generation means controls the mapping boundary in accordance with the color distribution of the input image.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 1, wherein no discontinuous point occurs near the boundary between a linear mapping range for performing said linear mapping and a non-linear mapping range for performing said non-linear mapping.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 1, further comprising: image forming means for forming an image on the basis of image data on which the color mapping process is performed.
Claim 7
Dependent Claim
96 words
An image processing method comprising: an input step of inputting image data representing an image; a judgement step of judging a color distribution of the image on the basis of the input image data; a generation step of generating a color mapping condition so as not to appear discontinuous in a combined portion of the linear mapping and non-linear mapping, on the basis of a combination condition of linear mapping and non-linear mapping according to the judged color distribution; and a process step of performing a color mapping process by using the generated color mapping condition.
Claim 8
Dependent Claim
96 words
An image processing method comprising: an input step of inputting image data representing an image; a judgement step of judging a color distribution of the image on the basis of the input image data; a generation step of generating a color mapping condition so as not to appear discontinuous in a combined portion of the linear mapping and non-linear mapping, on the basis of a combination condition of linear mapping and non-linear mapping according to the judged color distribution; and a process step of performing a color mapping process by using the generated color mapping condition.
Claim 9
Dependent Claim
65 words
An image processing method comprising: an input step of inputting a user's instruction concerning a combination ratio of an area to faithfully perform mapping and an area to perform non-linear mapping; and a setting step of setting a color mapping condition so as not to appear discontinuous at a boundary portion of the area to faithfully perform mapping and the area to perform non-linear mapping.
Claim 10
Dependent Claim
65 words
An image processing method comprising: an input step of inputting a user's instruction concerning a combination ratio of an area to faithfully perform mapping and an area to perform non-linear mapping; and a setting step of setting a color mapping condition so as not to appear discontinuous at a boundary portion of the area to faithfully perform mapping and the area to perform non-linear mapping.
Claim 11
Dependent Claim
23 words
A method according to claim 7, wherein the color mapping condition is set based on the user's instruction concerning a degree of non-linearity.
Claim 12
Dependent Claim
30 words
An apparatus according to claim 7, further comprising: a color gamut mapping step of performing a color gamut mapping corresponding to the set color gamut mapping condition, for image data.
Claim 13
Dependent Claim
84 words
An image processing apparatus comprising: input means for inputting a user's instruction concerning a combination ratio of an area to faithfully perform mapping and an area to perform non-linear mapping; setting means for setting a color mapping condition so as not to appear discontinuous at a boundary portion of the area to faithfully perform mapping and the area to perform non-linear mapping; and color gamut mapping means for performing a color gamut mapping corresponding to the set color gamut mapping condition, for image data.
Claim 14
Dependent Claim
84 words
An image processing apparatus comprising: input means for inputting a user's instruction concerning a combination ratio of an area to faithfully perform mapping and an area to perform non-linear mapping; setting means for setting a color mapping condition so as not to appear discontinuous at a boundary portion of the area to faithfully perform mapping and the area to perform non-linear mapping; and color gamut mapping means for performing a color gamut mapping corresponding to the set color gamut mapping condition, for image data.
Claim 15
Dependent Claim
29 words
An apparatus according to claim 10, further comprising: image forming means for forming an image on the basis of image data on which the color mapping process is performed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-21 | 2003-09-20 | 2004-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-21 | 2007-09-20 | 2008-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-21 | 2011-09-20 | 2012-03-21 | $7700.00 | Window Closed / Lapsed |