US6167165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adjusting image detail to compensate for an applied tone scale
Assignee: Monument Peak Ventures LLC
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Filing: 1998-11-25
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Granted: 2000-12-26
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Expires: 2018-11-25
Abstract
Abstract A method for modifying the spatial frequency detail of a digital image channel, the method comprises receiving a digital image channel; providing a tone scale function; and modifying the spatial frequency detail of the digital image channel based on the characteristics of the tone scale function.
Inventors
- 👤 Andrew C. Gallagher
- 👤 Edward B. Gindele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:41
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/58; H04N1/40; H04N1/409
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A method for modifying the spatial frequency detail of a digital image channel, the method comprising: (a) receiving a digital image channel comprised of local image pixel values; (b) providing a tone scale function that is a function of the local image pixel values; (c) obtaining the local slope of the tone scale function, which local slope varies on a pixel-by-pixel basis; and (d) modifying the spatial frequency detail of the digital image channel in proportion to an inverse function of the local slope.
Claim 2
Independent Claim
84 words
A method for modifying the spatial frequency detail of a digital image channel, the method comprising: (a) receiving a digital image channel comprised of local image pixel values; (b) providing a tone scale function that is a function of the local image pixel values; (c) obtaining the local slope of the tone scale function, which local slope varies on a pixel-by-pixel basis; and (d) modifying the spatial frequency detail of the digital image channel in proportion to an inverse function of the local slope.
Claim 3
Dependent Claim
26 words
The method as in claim 1, wherein step (a) includes receiving the digital image channel having the tone scale function applied to the digital image channel.
Claim 4
Dependent Claim
19 words
The method as in claim 1 further comprising the step of applying the tone scale function after step (d).
Claim 5
Dependent Claim
25 words
The method as in claim 1 further comprising the step of applying a tone scale function approximating the characteristic tonal response of an output device.
Claim 6
Dependent Claim
14 words
The method as in claim 4 in which the output device is a printer.
Claim 7
Dependent Claim
15 words
The method as in claim 4 in which the output device is a display monitor.
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) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |