US4386267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color isolation method
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1980-10-15
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Granted: 1983-05-31
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Expires: 2000-10-15
Abstract
Abstract The method allows the isolation of a certain portion of an original color picture having a color which corresponds to a reference color in a photoelectrical picture reproducing process. The colors of the original picture as well as the reference color are identified by using a color plane which is divided up into incremental areas. Since the computation process is simplified, the color isolation process can be accomplished at the same time as the original picture is photoelectrically scanned.
Inventors
- 👤 Mitsuhiko Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:22
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62; G; G01; G01J; G01J3/00; G01J3/46; G01J3/462; G01J2003/466
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A color isolation method for isolating colors of individual portions of a colored picture comprising: scanning said picture point by point to extract color components of each of said points; comparing each of said color components with a reference color to provide a set of comparison signals; converting said color components by use of said comparison signals to a set of vector signals wherein the number of vector signals is less than the number of said color components; storing vectorial representations of combinations of said color components in a memory; and addressing said memory with said vector signals and said comparison signals to extract vectorial representations of the color of successive ones of said points of said picture.
Claim 2
Dependent Claim
118 words
A color isolation method for isolating colors of individual portions of a colored picture comprising: scanning said picture point by point to extract color components of each of said points; comparing each of said color components with a reference color to provide a set of comparison signals; converting said color components by use of said comparison signals to a set of vector signals wherein the number of vector signals is less than the number of said color components; storing vectorial representations of combinations of said color components in a memory; and addressing said memory with said vector signals and said comparison signals to extract vectorial representations of the color of successive ones of said points of said picture.
Claim 3
Dependent Claim
106 words
A color isolation method according to claim 1 wherein, each of the colors is represented by one of incremental areas of a color plane which graphically represents a desired range of color and the portion of the original color picture having the color which corresponds to the reference color, in that these two colors are represented by the same incremental area of the color plane; and wherein: the color plane is represented by a plane coordinate system having three axes which correspond to three different basic colors and which plane is divided into a plurality of sectors by radial lines, each sector corresponding to different hues.
Claim 4
Dependent Claim
24 words
A color isolation method according to claim 2, wherein the color plane is further divided up by concentric circles for defining different color saturations.
Claim 5
Dependent Claim
51 words
A color isolation method according to claim 2 or 3, wherein the original picture is photoelectrically scanned and wherein the comparing of the color of each scanned point with the reference color, corresponding to respective incremental areas, and is accomplished at the same time as the original color picture is scanned.
Claim 6
Dependent Claim
36 words
A color isolation method according to claim 4, wherein the color plane is divided into three basic color sectors and the comparison includes the identification of the basic color sectors to which the two colors belong.
Claim 7
Dependent Claim
20 words
A color isolation method according to claim 5, wherein the reference color is given by photoelectrically scanning an actual color.
Claim 8
Dependent Claim
32 words
A color isolation method according to claim 6, wherein the reference color is given as a set of data latched in a latching circuit which can be reset by a control signal.
Claim 9
Dependent Claim
52 words
A method according to claim 1, wherein said step of comparing is accomplished by a logic operation including the combining of comparisons between pairs of color components drawn from a group consisting of all of said color components, said logic arrangement including the determining of the color component having the smallest amplitude.
Claim 10
Dependent Claim
46 words
A method according to claim 8, wherein said step of storing the vectorial representations is accomplished in accordance with a plan consisting of three primary reference colors each of which is represented by a vector, each of said color components corresponding to one of said vectors.
Claim 11
Dependent Claim
32 words
A method according to claim 9, wherein the vectorial representations of said storing step are presented in terms of amplitude and angled with reference to a planar configuration of a color chart.
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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |