US4687334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adjusting density of color picture in color picture output device
Assignee: Fujifilm Holdings Corp
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Filing: 1985-04-11
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Granted: 1987-08-18
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Expires: 2005-04-11
Abstract
Abstract Adjustment of color density of a color picture to be recorded on a photosensitive material is performed in a color picture output device in such a manner that a test pattern print is outputted from the device and the density of the test pattern print is then compared with a standard pattern plate preliminarily prepared. After the actual output picture color density is measured by the standard pattern plate, the gain and offset for obtaining the standard density can be automatically calculated so as to thereby perform in smooth and high speed color picture outputting operation.
Inventors
- 👤 Tadashi Miyakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:40
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033; H04N1/40; H04N1/407; H04N1/4076; H04N1/4078; H04N1/50; H04N1/504; H04N1/6027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A method for adjusting a density of a color picture outputted on a photosensitive material with a plurality of luminescent colors in a color picture output device comprising the steps of: preparing a test pattern print of the color picture on which color step tablets are provided stepwisely with densities divided at predetermined widths of densities between a highest color density and a lowest color density with respect to three primary colors; designating step numbers of the color step tablets in accordance with shades thereof; preparing a standard pattern plate on which standard color patches provided with light and high densities are printed with respect to the three primary colors; visually comparing the densities of the step tablets with those of the standard color patches with respect to the three primary colors; respectively inputting step numbers of the step tablets corresponding to the standard color patches obtained by the comparing step; and calculating gain and offset of the luminescent colors of the output device so as to thereby adjust the output densities of the picture colors of the color picture in accordance with the inputted step numbers.
Claim 2
Independent Claim
187 words
A method for adjusting a density of a color picture outputted on a photosensitive material with a plurality of luminescent colors in a color picture output device comprising the steps of: preparing a test pattern print of the color picture on which color step tablets are provided stepwisely with densities divided at predetermined widths of densities between a highest color density and a lowest color density with respect to three primary colors; designating step numbers of the color step tablets in accordance with shades thereof; preparing a standard pattern plate on which standard color patches provided with light and high densities are printed with respect to the three primary colors; visually comparing the densities of the step tablets with those of the standard color patches with respect to the three primary colors; respectively inputting step numbers of the step tablets corresponding to the standard color patches obtained by the comparing step; and calculating gain and offset of the luminescent colors of the output device so as to thereby adjust the output densities of the picture colors of the color picture in accordance with the inputted step numbers.
Claim 3
Dependent Claim
81 words
A method according to claim 1, wherein the calculating step is performed to obtain a new gain G and a new offset So for the output device regarding the density of the picture color of the color picture in accordance with the equations: ##EQU2## where Go: original gain So: original offset DH,DL: values corresponding to densities of the determined step numbers of the test pattern print; and dH,dL: density values of the standard color patches printed on the standard pattern plate.
Claim 4
Dependent Claim
29 words
A method according to claim 1, wherein the plurality of luminescent colors are blue, green and red (BGR) and the three primary colors are yellow, magenta and cyan (YMC).
Claim 5
Dependent Claim
27 words
A method according to claim 1, wherein windows are respectively provided for the standard color patches in a side-by-side relationship with respect to the three primary colors.
Claim 6
Dependent Claim
15 words
A method according to claim 1, wherein each of the windows has a rectangular shape.
References Cited (Backward Citations)
US4183990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |