US4551750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color picture reading system
Assignee: Fujifilm Business Innovation Corp
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Filing: 1982-08-30
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Granted: 1985-11-05
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Expires: 2002-08-30
Abstract
Abstract A two-color reading system includes binary encoders for signals of wide and narrow wavelength ranges. The reference level of the narrow wavelength encoder is set proportionately to the level of the wide wavelength signal by means of a voltage divider, so that the second color of the two color system may be more accurately separated.
Inventors
- 👤 Masami Kurata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:08
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/488
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A color picture reading system, comprising: first and second means for subjecting an optical image of an original to photo-electric conversion with respectively wide and narrow wavelength ranges; first encoder means for binary-encoding a signal obtained from said first means with a predetermined voltage level; second encoder means for binary-encoding an output signal from said second means with a single threshold level proportional to a level of said signal from said first means; and circuit means for processing signals output by said first and second encoder means to perform a desired two-color separation.
Claim 2
Dependent Claim
93 words
A color picture reading system, comprising: first and second means for subjecting an optical image of an original to photo-electric conversion with respectively wide and narrow wavelength ranges; first encoder means for binary-encoding a signal obtained from said first means with a predetermined voltage level; second encoder means for binary-encoding an output signal from said second means with a single threshold level proportional to a level of said signal from said first means; and circuit means for processing signals output by said first and second encoder means to perform a desired two-color separation.
Claim 3
Dependent Claim
19 words
A reading system as claimed in claim 1, said first and second means comprising first and second photo-electric converters.
Claim 4
Dependent Claim
25 words
A reading system as claimed in claim 1, said narrow wavelength range comprising said wide wavelength range with a specific color range having been removed.
Claim 5
Dependent Claim
31 words
A reading system as claimed in claim 1, further comprising voltage division means arranged between an output of said first photo-electric conversion means and an input of said second encoder means.
Claim 6
Dependent Claim
15 words
A reading system as claimed in claim 4, said voltage divider means comprising resistor means.
Claim 7
Dependent Claim
39 words
A reading system as claimed in claim 3, said circuit means including means for outputting a signal representative of said specific color range, and means for removing said specific color range from the output of said first encoder means.
References Cited (Backward Citations)
US4206475A
Cited
US4479242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |