EP0475554A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus and method for colour calibration
Assignee: Scitex Corp Ltd
•
Filing: 1991-02-04
•
Granted: —
•
Expires: 2011-02-04
Abstract
Abstract There is disclosed technique and apparatus for calibrating a color processing device. The technique includes the steps of comparing a first digital representation of a colored image with a second digital representation thereof and employing at least the transformation to control operation of the color processing device to be calibrated. The first digital representation defines a plurality of first non-scalar color values and the second digital representation defines a plurality of second non-scalar color values corresponding to the plurality of the first non-scalar color values, thereby to provide a transformation pairing each individual one of the first non-scalar color values with a value relatively close to the corresponding one of the second non-scalar color values. The color processing device may be calibrated generally without reference to human aesthetic judgement. There is additionally provided a method and apparatus for transforming an element of a domain of a first color printing device to an element of a domain of a second color printing device. The method comprises the steps of providing a first transformation from a first digital representation of a colored image to a second digital representation thereof and a second transformation from a third digital representation of a colored image to a fourth digital representation thereof and comparing the first transformation with the second transformation. The second transformation corresponds to the second color printing device, the first transformation corresponds to the first color printing device and the second and fourth digital representations are defined within a single color space.
Inventors
- 👤 Zeev Smilansky
- 👤 Haim Zvi Melman
- 👤 Yoav Bresler
- 👤 Matty J. Litvak
- 👤 Haim Kreitman
- 👤 Itai Yad-Shalom
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 08:04
CPC Classifications
G; G06; G06F; G06F17/00; G06F17/10; G06F17/15; G06T; G06T5/00; G06T5/20; H; H04; H04N; H04N1/00; H04N1/46; H04N1/52; H04N1/56; H04N1/60; H04N1/603; H04N1/6033
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
123 words
A technique for calibrating a color processing device comprising the steps of: comparing a first digital representation of a colored image with a second digital representation thereof, said first digital representation defining a plurality of first non-scalar color values, said second digital representation defining a plurality of second non-scalar color values corresponding to the plurality of said first non-scalar color values, thereby to provide a transformation pairing each individual one of said first non-scalar color values with a value relatively close to the corresponding one of said second non-scalar color values; and employing at least the transformation to control operation of said color processing device to be calibrated, whereby the color processing device may be calibrated generally without reference to human aesthetic judgement.
Claim 2
Dependent Claim
123 words
A technique for calibrating a color processing device comprising the steps of: comparing a first digital representation of a colored image with a second digital representation thereof, said first digital representation defining a plurality of first non-scalar color values, said second digital representation defining a plurality of second non-scalar color values corresponding to the plurality of said first non-scalar color values, thereby to provide a transformation pairing each individual one of said first non-scalar color values with a value relatively close to the corresponding one of said second non-scalar color values; and employing at least the transformation to control operation of said color processing device to be calibrated, whereby the color processing device may be calibrated generally without reference to human aesthetic judgement.
Claim 3
Dependent Claim
108 words
Apparatus for sampling the color processing characteristics of a color processing device, said color processing device being operative to convert a first representation of a colored image to a second representation thereof, said sampling apparatus comprising: a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device.
Claim 4
Dependent Claim
108 words
Apparatus for sampling the color processing characteristics of a color processing device, said color processing device being operative to convert a first representation of a colored image to a second representation thereof, said sampling apparatus comprising: a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device.
Claim 5
Independent Claim
173 words
A method of constructing apparatus for sampling the color processing characteristics of a color processing device, said color processing device being operative to convert a first representation of a colored image to a second representation thereof, the method comprising the step of repeating at least once the steps of: providing first and second representations of a colored image, said representations respectively comprising a first multiplicity of first color values and a second multiplicity of second color values corresponding thereto, said first and second representations being characterized in that processing said first representation with said color processing device defines said second representation; comparing the first representation of the colored image with the second representation thereof, thereby to provide a transformation, characterized in that operating said transformation on each individual one of said second multiplicity of second color values gives a value substantially equal to the corresponding one of said first multiplicity of first color values; and operating the transformation on said first representation of the colored image, thereby to provide a third representation thereof.
Claim 6
Independent Claim
173 words
A method of constructing apparatus for sampling the color processing characteristics of a color processing device, said color processing device being operative to convert a first representation of a colored image to a second representation thereof, the method comprising the step of repeating at least once the steps of: providing first and second representations of a colored image, said representations respectively comprising a first multiplicity of first color values and a second multiplicity of second color values corresponding thereto, said first and second representations being characterized in that processing said first representation with said color processing device defines said second representation; comparing the first representation of the colored image with the second representation thereof, thereby to provide a transformation, characterized in that operating said transformation on each individual one of said second multiplicity of second color values gives a value substantially equal to the corresponding one of said first multiplicity of first color values; and operating the transformation on said first representation of the colored image, thereby to provide a third representation thereof.
Claim 7
Dependent Claim
145 words
A technique for quality control of a color processing device operative to convert a first representation of a colored image to a second representation thereof, the technique comprising the steps of: providing apparatus for sampling the color processing characteristics of the color processing device, said sampling apparatus comprising a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device; processing said sampling apparatus on said color processing device; and employing the results of the processing step of control oepration of the color processing device.
Claim 8
Dependent Claim
145 words
A technique for quality control of a color processing device operative to convert a first representation of a colored image to a second representation thereof, the technique comprising the steps of: providing apparatus for sampling the color processing characteristics of the color processing device, said sampling apparatus comprising a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device; processing said sampling apparatus on said color processing device; and employing the results of the processing step of control oepration of the color processing device.
Claim 9
Dependent Claim
153 words
A technique for repeatibility testing of a color processing device operative to convert a first representation of a colored image to a second representation thereof, the technique comprising the steps of: providing apparatus for sampling the color processing characteristics of the color processing device, said sampling apparatus comprising a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device; processing said sampling apparatus on said color processing device; repeating said step of processing on at least one further occasion; and comparing the results of at least two repetitions of said processing steps.
Claim 10
Dependent Claim
153 words
A technique for repeatibility testing of a color processing device operative to convert a first representation of a colored image to a second representation thereof, the technique comprising the steps of: providing apparatus for sampling the color processing characteristics of the color processing device, said sampling apparatus comprising a first representation of a colored image characterized in that processing said first representation of said colored image with the color processing device provides a second representation of said colored image which defines a provided plurality of color values, each individual one of said provided plurality of color values being substantially equal to a corresponding one of a predetermined plurality of color values falling within the range of said color processing device; processing said sampling apparatus on said color processing device; repeating said step of processing on at least one further occasion; and comparing the results of at least two repetitions of said processing steps.
Claim 11
Independent Claim
114 words
A method for transforming an element of a domain of a first color printing device to an element of a domain of a second color printing device, the method comprising the steps of: providing a first transformation from a first digital representation of a colored image to a second digital representation thereof and a second transformation from a third digital representation of a colored image to a fourth digital representation thereof, said second transformation corresponding to said second color printing device, said first transformation corresponding to said first color printing device and said second and fourth digital representations being defined within a single color space; and comparing said first transformation with said second transformation.
Claim 12
Independent Claim
114 words
A method for transforming an element of a domain of a first color printing device to an element of a domain of a second color printing device, the method comprising the steps of: providing a first transformation from a first digital representation of a colored image to a second digital representation thereof and a second transformation from a third digital representation of a colored image to a fourth digital representation thereof, said second transformation corresponding to said second color printing device, said first transformation corresponding to said first color printing device and said second and fourth digital representations being defined within a single color space; and comparing said first transformation with said second transformation.
Claim 13
Independent Claim
34 words
A method for quantifying the appearance of an analog representation of a location of a colored image comprising the step of: providing an n-dimensional representation of said location, wherein n is at least 4.
Claim 14
Independent Claim
34 words
A method for quantifying the appearance of an analog representation of a location of a colored image comprising the step of: providing an n-dimensional representation of said location, wherein n is at least 4.
Claim 15
Dependent Claim
112 words
Apparatus for transforming an element of a domain of a first color printing device to an element of a domain of a second color printing device comprising; means for providing a first transformation from a first digital representation of a colored image to a second digital representation thereof and a second transformation from a third digital representation of a colored image to a fourth digital representation thereof, said second transformation corresponding to said second color printing device, said first transformation corresponding to said first color printing device and said second and fourth digital representations being defined within a single color space; and means for comparing said first transformation with said second transformation.
Claim 16
Dependent Claim
112 words
Apparatus for transforming an element of a domain of a first color printing device to an element of a domain of a second color printing device comprising; means for providing a first transformation from a first digital representation of a colored image to a second digital representation thereof and a second transformation from a third digital representation of a colored image to a fourth digital representation thereof, said second transformation corresponding to said second color printing device, said first transformation corresponding to said first color printing device and said second and fourth digital representations being defined within a single color space; and means for comparing said first transformation with said second transformation.
Claim 17
Dependent Claim
32 words
Apparatus for quantifying the appearance of an analog representation of a location of a colored image comprising; means for providing an n-dimensional representation of said location, wherein n is at least 4.
Claim 18
Dependent Claim
32 words
Apparatus for quantifying the appearance of an analog representation of a location of a colored image comprising; means for providing an n-dimensional representation of said location, wherein n is at least 4.
Claim 19
Independent Claim
65 words
A system for converting between a digital and an analog representation of an image comprising: a translation system for translating a reading and writing point across a substrate: a color proofer comprising said writing point for writing, from said digital representation, said analog representation onto said substrate; and a color reading system comprising said reading point for reading said digital representation from said analog representation.
Claim 20
Independent Claim
65 words
A system for converting between a digital and an analog representation of an image comprising: a translation system for translating a reading and writing point across a substrate: a color proofer comprising said writing point for writing, from said digital representation, said analog representation onto said substrate; and a color reading system comprising said reading point for reading said digital representation from said analog representation.
Claim 21
Dependent Claim
95 words
A technique for controlling the operation of an image processing device having a first color coordinate system and comprising the steps of: receiving a digital representation of a color image defined in a second color coordinate system; providing a transformation between said first color coordinate system and said second color coordinate system; employing said transformation to transform said digital representation of said color image into a transformed digital representation of said color image in said first color coordinate system; and employing said image processing device to modify said transformed digital representation of said color image.
Claim 22
Dependent Claim
95 words
A technique for controlling the operation of an image processing device having a first color coordinate system and comprising the steps of: receiving a digital representation of a color image defined in a second color coordinate system; providing a transformation between said first color coordinate system and said second color coordinate system; employing said transformation to transform said digital representation of said color image into a transformed digital representation of said color image in said first color coordinate system; and employing said image processing device to modify said transformed digital representation of said color image.
Claim 23
Dependent Claim
94 words
An image processing device having a first color coordinate system comprising: means for receiving a digital representation of a color image defined in a second color coordinate system; transformation construction means for providing a transformation between said first color coordinate system and said second color coordinate system: and means for employing said transformation to transform said digital representation of said color image into a transformed digital representation of said color image in said first color coordinate system, wherein said image processing device is operative to modify said transformed digital representation of said color image.
Claim 24
Dependent Claim
94 words
An image processing device having a first color coordinate system comprising: means for receiving a digital representation of a color image defined in a second color coordinate system; transformation construction means for providing a transformation between said first color coordinate system and said second color coordinate system: and means for employing said transformation to transform said digital representation of said color image into a transformed digital representation of said color image in said first color coordinate system, wherein said image processing device is operative to modify said transformed digital representation of said color image.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.