Printer media including compressed sensitometry curve information
First Claim
1. A product for use with a printer adapted to use a set of spline coefficients to construct a sensitometric curve, said product comprising:
- imaging media having a predetermined sensitometry; and
memory in which is stored a set of such spline coefficients which represent the predetermined sensitometry of the media.
1 Assignment
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Accused Products
Abstract
Sensitometric information is stored with a consumable print medium having a predetermined sensitometry by compressing the sensitometric information as a set of spline coefficients for use with a printer adapted to decode the set of spline coefficients to construct a sensitometric curve. A set of spline coefficients is generated, spline coefficients are encoded, and the encoded spline coefficients are stored in a manner which is accessible to a printing device adapted to make use of the media sensitometry data for purposes of device calibration. The coefficient-generating step comprises fitting a spline curve to the sensitometry data. The spline curve may be monotonic cubic. The encoding step may include encoding a difference signal representing a difference between input values for a set of sequential spline knots. The encoding step may also include encoding a difference signal representing a difference between the output values of the sensitometry curve and output values of a reference sensitometry curve for each of a set of sequential spline knots. The difference signal may be encoded by quantizing the difference signal into a set of discrete bins.
53 Citations
25 Claims
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1. A product for use with a printer adapted to use a set of spline coefficients to construct a sensitometric curve, said product comprising:
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imaging media having a predetermined sensitometry; and memory in which is stored a set of such spline coefficients which represent the predetermined sensitometry of the media. - View Dependent Claims (2)
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3. A method for efficiently storing media sensitometry data for imaging media, said method comprising the steps of:
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generating a set of spline coefficients; encoding the spline coefficients; and storing the encoded spline coefficients in a manner which is accessible to a printing device adapted to make use of the media sensitometry data for purposes of device calibration. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for efficiently storing media sensitometry data for imaging media, said method comprising the steps of:
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generating a set of spline coefficients; encoding the spline coefficients; and storing the encoded spline coefficients in a manner which is associated with the imaging media so as to be accessible to a printing device which makes use of said media sensitometry data for purposes of device calibration. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification