US7193746B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing device image processing method, and record medium
Assignee: Seiko Epson Corp
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Filing: 2002-06-27
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Granted: 2007-03-20
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Expires: 2022-06-27
Abstract
Abstract An image processing apparatus includes a color correction table, which provides a color conversion amount according to lightness L based on a color conversion amount for white (ΔLw, Δuw, Δvw), and uses this color correction table for desired color correction. The color correction table decreases the color conversion amount to approximately zero when the lightness is less than a predetermined value Lmin. Also, the color correction by the color correction table is conducted such that a color point is moved toward a direction which maintains the lightness, or such that the color point is moved toward a direction which increases the lightness.
Inventors
- 👤 Masashi Kanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:40
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/67; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
38 words
An image processing apparatus for conducting a desired color correction by using a color correction table, comprising a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 2
Dependent Claim
38 words
An image processing apparatus for conducting a desired color correction by using a color correction table, comprising a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 3
Dependent Claim
19 words
The image processing apparatus according to claim 1 , wherein the color conversion amount decreases as the lightness decreases.
Claim 4
Dependent Claim
24 words
The image processing apparatus according to claim 2 , wherein the color conversion amount decreases based on a quadratic function as the lightness decreases.
Claim 5
Dependent Claim
26 words
The image processing apparatus according to claim 1 , wherein the color conversion amount becomes approximately zero when the lightness decreases less than a predetermined value.
Claim 6
Dependent Claim
27 words
The image processing apparatus according to claim 4 , wherein said predetermined value is less than or equal to 50 when the lightness of white is 100.
Claim 7
Dependent Claim
36 words
The image processing apparatus according to claim 1 , wherein the color correction by the color correction table is conducted such that a color point is moved toward a direction so as to maintain the lightness.
Claim 8
Dependent Claim
36 words
The image processing apparatus according to claim 1 , wherein the color correction by the color correction table is conducted such that a color point is moved toward a direction so as to increase the lightness.
Claim 9
Dependent Claim
33 words
An image processing method for conducting a desired color correction by using a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 10
Dependent Claim
33 words
An image processing method for conducting a desired color correction by using a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 11
Dependent Claim
47 words
A computer-readable medium storing a computer-program of instructions for execution by the computer to perform an image processing for conducting a desired color correction by using a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 12
Dependent Claim
47 words
A computer-readable medium storing a computer-program of instructions for execution by the computer to perform an image processing for conducting a desired color correction by using a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 13
Dependent Claim
25 words
A computer-readable medium storing a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
Claim 14
Dependent Claim
25 words
A computer-readable medium storing a color correction table for providing a color conversion amount according to lightness based on a color conversion amount of white.
References Cited (Backward Citations)
US5539540A
Cited
US5502580A
Cited
JPH0832828A
Cited
JPH08324027A
Cited
JPH10210275A
Cited
JPH10229500A
Cited
JPH11146209A
Cited
JPH11341296A
Cited
JP2001086356A
Cited
JP2001238091A
Cited
US20020045470A1
Cited
US6729954B2
Cited
JP2003018416A
Cited
JP2003018415A
Cited
US20030035157A1
Cited
US20030053088A1
Cited
US20030030718A1
Cited
US20030193677A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-03-19 | 2010-09-18 | 2011-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-03-19 | 2014-09-18 | 2015-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-03-19 | 2018-09-18 | 2019-03-20 | $7700.00 | Window Closed / Lapsed |