US4180330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and a system for color separation
Assignee: Panasonic Holdings Corp
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Filing: 1977-05-18
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Granted: 1979-12-25
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Expires: 1997-05-18
Abstract
Abstract Light beams scans patterns of a subject copy, being reflected therefrom, and being converted into pulsating electrical signals. Color borders between two different colored patterns are detected based on the pulsating signals. On the other hand, a color of a predetermined scanned line following each of the color borders is sensed for determining the sensed color as a color between the adjacent color borders.
Inventors
- 👤 Hiroaki Kotera
- 👤 Hiroyoshi Tsuchiya
- 👤 Ryuzo Itabashi
- 👤 Kunio Yoshida
- 👤 Tsutomu Shibata
- 👤 Yukifumi Tsuda
- 👤 Yoshimitsu Kanno
- 👤 Heijiro Hayami
- 👤 Haruko Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/488
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A method of color separation of colored patterns on a subject copy, which comprises the following steps: scanning the subject copy by means of light beams; detecting color borders each of which is between two consecutive different colored patterns, scanned by said light beams; and discriminating a color of a predetermined scanned portion following each of the detected color borders and determining the sensed color as a color between the detected and adjacent color borders.
Claim 2
Independent Claim
75 words
A method of color separation of colored patterns on a subject copy, which comprises the following steps: scanning the subject copy by means of light beams; detecting color borders each of which is between two consecutive different colored patterns, scanned by said light beams; and discriminating a color of a predetermined scanned portion following each of the detected color borders and determining the sensed color as a color between the detected and adjacent color borders.
Claim 3
Dependent Claim
74 words
A method as claimed in claim 1, wherein the step of detecting comprises: separating the light beams reflected from the subject copy into a plurality of spectra; converting the spectra into corresponding electrical signals; differentiating the electrical signals; taking absolute values of each of the differentiated electrical signals; adding the magnitude of the absolute values; and generating a pulse every time the added magnitude exceeds a predetermined level, which pulse indicates the color border.
Claim 4
Independent Claim
81 words
A system for color separation of colored patterns on a subject copy, which comprises: first means for scanning the subject copy by means of light beams; second means for detecting color borders each of which is between two consecutive different colored patterns, scanned by said light beams; and third means for discriminating a color of a predetermined scanned portion following each of the detected color borders and determining the sensed color as a color between the detected and adjacent color borders.
Claim 5
Independent Claim
81 words
A system for color separation of colored patterns on a subject copy, which comprises: first means for scanning the subject copy by means of light beams; second means for detecting color borders each of which is between two consecutive different colored patterns, scanned by said light beams; and third means for discriminating a color of a predetermined scanned portion following each of the detected color borders and determining the sensed color as a color between the detected and adjacent color borders.
Claim 6
Dependent Claim
132 words
A system as claimed in claim 3, wherein the second means comprises: fourth means for separating the light beams reflected from the subject copy into a plurality of spectra; fifth means for receiving the reflected light beams and converting the spectra into corresponding electrical signals; sixth means for receiving the electrical signal and differentiating the same, the sixth means being connected to the fifth means; seventh means for taking absolute values of each of the differentiated electrical signals and generating a signal representative thereof, which means is connected to the sixth means; eighth means for adding the magnitudes of the absolute values and generating a signal representative of the added magnitude; and means for generating a pulse every time the added magnitude exceeds a predetermined level, which pulse indicate the color border.
Claim 7
Dependent Claim
64 words
A system as claimed in claim 4, further comprising: an analog gate connected to the fifth means and allowing the electrical signals to pass therethrough for a predetermined time duration; an A-D converter connected to the analog gate, converting the electrical signals from the analog gate into digital form; and an OR gate connected to both of the A-D converter and the eighth means.
Claim 8
Dependent Claim
68 words
A system as claimed in claim 5, further comprising: an adder interposed between the fifth means and the analog gate, adding the magnitudes of the electrical signals, and applying the added signal to the analog gate; and a plurality of subtractors each of which is interposed between the fifth means and the analog gate and generates a signal representative of a magnitude difference between two electrical signals therefrom.
Claim 9
Dependent Claim
89 words
A system as claimed in claim 4, wherein the fourth means comprises: a plurality of optical interference filters each provided with multi-coated layers, at least one of the filters having a main transmitting range and sub-transmitting ranges, tne sub-transmitting range being at both sides or one side of the former, and the filters being arranged in such a manner as to separate the light beams into a plurality of light paths by transmitting and reflecting the light beams and to selectively allow the light beams according to spectra thereof.
Claim 10
Dependent Claim
35 words
A system as claimed in claim 7, further comprising a plurality of optical interference filters each of which is provided in the light path and after each of the first-mentioned filters for regulating wavelength width.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |