US6556312B1
Expired / Lapsed
US
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Data converter and method
Assignee: Canon Inc
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Filing: 1999-06-30
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Granted: 2003-04-29
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Expires: 2019-06-30
Abstract
Abstract Due to high resolution of color printers and the increased number of colors in image formation from four colors (Y, M, C and K) to six or seven colors including pale colors, the number of times of referring to LUT data and the number of times of calculation are increasing in interpolation operation for generating print data. In view of this, when inputted R, G and B data are converted to Y, M, C and K data by performing interpolation operation using a conversion table which expresses the input-output relations, if output values corresponding to eight vertices of a unit cube used for interpolation are the same value, the calculation is not performed but the value is outputted as the interpolation result.
Inventors
- 👤 Masahiro Nagatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:31
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6016; H04N1/6022; H04N1/6025; G; G06; G06K; G06K15/00; G06K15/02; G06K2215/00; G06K2215/0082; G06K2215/0094
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A data converter comprising: a memory, arranged to store a conversion table which indicates relationship between an input and an output of said converter; and a converting section, arranged to convert input data to output data by performing interpolation, which uses the conversion table, in each of a plurality of color components included in the output data, wherein when data obtained from the conversion table and requested by the interpolation in one of the color components are the same, said converting section outputs one of the data as a result of interpolation in the one of the color components.
Claim 2
Dependent Claim
99 words
A data converter comprising: a memory, arranged to store a conversion table which indicates relationship between an input and an output of said converter; and a converting section, arranged to convert input data to output data by performing interpolation, which uses the conversion table, in each of a plurality of color components included in the output data, wherein when data obtained from the conversion table and requested by the interpolation in one of the color components are the same, said converting section outputs one of the data as a result of interpolation in the one of the color components.
Claim 3
Dependent Claim
27 words
The converter according to claim 1 , wherein said converting section converts a color space of input image data to a color space of output image data.
Claim 4
Dependent Claim
98 words
A data converter comprising: a memory, arranged to store a conversion table which indicates relationship between an input and an output of said converter; and a converting section, arranged to convert input data to output data by performing interpolation, which uses the conversion table, in each of a plurality of color components included in the output data, wherein when data obtained from the conversion table and requested by the interpolation in one of the color components are zeros, said converting section outputs data having zero as a result of the interpolation in the one of the color components.
Claim 5
Dependent Claim
98 words
A data converter comprising: a memory, arranged to store a conversion table which indicates relationship between an input and an output of said converter; and a converting section, arranged to convert input data to output data by performing interpolation, which uses the conversion table, in each of a plurality of color components included in the output data, wherein when data obtained from the conversion table and requested by the interpolation in one of the color components are zeros, said converting section outputs data having zero as a result of the interpolation in the one of the color components.
Claim 6
Dependent Claim
27 words
The converter according to claim 3 , wherein said converting section converts a color space of input image data to a color space of output image data.
Claim 7
Dependent Claim
88 words
A data conversion method for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said method comprising the step of outputting one of data as a result of the interpolation in one of the color components when the data obtained from the conversion table and requested by the interpolation in the one of the color components are the same.
Claim 8
Dependent Claim
88 words
A data conversion method for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said method comprising the step of outputting one of data as a result of the interpolation in one of the color components when the data obtained from the conversion table and requested by the interpolation in the one of the color components are the same.
Claim 9
Dependent Claim
27 words
The method according to claim 5 , wherein the conversion processing converts a color space of input image data to a color space of output image data.
Claim 10
Dependent Claim
86 words
A data conversion method for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said method comprising the step of outputting data having zero as a result of the interpolation in one of the color components when data obtained from the conversion table and requested by the interpolation in the one of the color components are zeros.
Claim 11
Dependent Claim
86 words
A data conversion method for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said method comprising the step of outputting data having zero as a result of the interpolation in one of the color components when data obtained from the conversion table and requested by the interpolation in the one of the color components are zeros.
Claim 12
Dependent Claim
27 words
The method according to claim 7 , wherein the conversion processing converts a color space of input image data to a color space of output image data.
Claim 13
Dependent Claim
98 words
A computer program product comprising a computer readable medium having computer program code, for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said product comprising conversion procedure code for outputting one of data as a result of the interpolation in one of the color components when the data obtained from the conversion table and requested by the interpolation in the one of the color components are the same.
Claim 14
Dependent Claim
98 words
A computer program product comprising a computer readable medium having computer program code, for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said product comprising conversion procedure code for outputting one of data as a result of the interpolation in one of the color components when the data obtained from the conversion table and requested by the interpolation in the one of the color components are the same.
Claim 15
Dependent Claim
96 words
A computer program product comprising a computer readable medium having computer program code, for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said product comprising conversion procedure code for outputting data having zero as a result of the interpolation in one of the color components when data obtained from the conversion table and requested by the interpolation in the one of the color components are zeros.
Claim 16
Dependent Claim
96 words
A computer program product comprising a computer readable medium having computer program code, for converting input data to output data by performing interpolation, which uses a conversion table indicating relationship between an input and an output of conversion processing, in each of a plurality of color components included in the output data, said product comprising conversion procedure code for outputting data having zero as a result of the interpolation in one of the color components when data obtained from the conversion table and requested by the interpolation in the one of the color components are zeros.
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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) | 2006-04-28 | 2006-10-28 | 2007-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-04-28 | 2010-10-28 | 2011-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-04-28 | 2014-10-28 | 2015-04-29 | $7700.00 | Window Closed / Lapsed |