EP0457427B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for sharpening a colour image
Assignee: Scitex Corp Ltd
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Filing: 1991-04-04
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Granted: 1995-12-06
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Expires: 2011-04-04
Abstract
Abstract An apparatus for sharpening a color image having a multiplicity of color separation signals defining a plurality of color pixels comprising apparatus for generating at least two sharpening signals from the color separation signals and apparatus for combining each of the color separation signals with any collection of the at least two sharpening signals wherein the collection changes throughout the color image. <IMAGE>
Inventors
- 👤 Michael Nagler
- 👤 Haim Zvi Melman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:40
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
Apparatus for sharpening a color image having a multiplicity of color separation signals defining a plurality of color pixels comprising: means for generating at least two sharpening signals from said color separation signals; and means for combining each of said color separation signals with any collection of said at least two sharpening signals, a collection consisting of none, one, or a combination of said at least two sharpening signals, wherein said collection changes throughout said color, image.
Claim 2
Dependent Claim
40 words
Apparatus according to claim 1 and wherein said means for combining include means for determining said collection as a function of at least one dimension of the at least three dimensional color value of each of said plurality of pixels.
Claim 3
Dependent Claim
142 words
Apparatus according to claim 2 and wherein said means for determining include means for separating a color solid into first, second and third volumes wherein if said three dimensional color value of a pixel falls within said first volume, a first collection of sharpening signals are combined with said color separation signals, if said three dimensional color value of a pixel falls within said third volume a second collection of sharpening signals are combined with said color separation signals and if said three dimensional color value of a pixel falls within said second volume, located generally between said first and third volumes, a combination of said first and said second collections of sharpening signals are combined with said color separation signals wherein said combination gradually changes from generally the entirety of said first collection to generally the entirety of said second collection.
Claim 4
Dependent Claim
27 words
Apparatus according to any of the previous claims and wherein said means for generating include means for performing edge detection on each of said color separation signals.
Claim 5
Dependent Claim
31 words
Apparatus according to any of the previous claims and wherein said color separation signals are in a predetermined color space and said sharpening signals are also in said predetermined color space.
Claim 6
Independent Claim
78 words
A method of sharpening a color image having a multiplicity of color separation signals defining a plurality of color pixels including the steps of: generating at least two sharpening signals from said color separation signals; and combining each of said color separation signals with any collection of said at least two sharpening signals, a collection consisting of none, one, or a combination of said at least two sharpening signals, and wherein said collection changes throughout said color image.
Claim 7
Dependent Claim
41 words
Method according to claim 6 and wherein said step of combining includes the step of determining said collection as a function of at least one dimension of the at least three dimensional color value of each of said plurality of pixels.
Claim 8
Dependent Claim
143 words
Method according to claim 7 and wherein said step of determining includes the step of separating a color solid into first, second and third volumes wherein if said three dimensional color value of a pixel falls within said first volume, a first collection of sharpening signals are combined with said color separation signals, if said three dimensional color value of a pixel falls within said third volume a second collection of sharpening signals are combined with said color separation signals and if said three dimensional color value of a pixel falls within said second volume, located generally between said first and third volumes, a combination of said first and said second collections of sharpening signals are combined with said color separation signals wherein said combination gradually changes from generally the entirety of said first collection to generally the entirety of said second collection.
Claim 9
Dependent Claim
31 words
Method according to any of the previous claims 6 - 7 and wherein said step of generating includes the step of performing edge detection on each of said color separation signals.
References Cited (Backward Citations)
No citation records indexed.
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