Color analysis
AssigneeHewlett-Packard Development Company, L.P.
InventorsJordi Arnabat Benedicto, Francisco Javier Pérez Gellida, Juan Uroz Soria, Oriol Borrell Avila, Emilio Angulo Navarro
Life of this patent
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Abstract
Techniques related to printing are described herein. According to an example, color patches are to be printed on a substrate. The substrate can be positioned on a substrate support for operation of a color sensor in a color measurement zone. Dimension and location in the substrate of the color patches are selected such that, for each color patch, at least a portion of the color patch can be positioned on a support projection in the color measurement zone. In some examples, color analysis techniques are described.
Claims13
A printing system for printing a substrate, the printing system comprising:
- a color measurement zone in which a color sensor is to determine color of color patches printed on the substrate;
- a substrate support for supporting the substrate at least in the color measurement zone during operation of the color sensor, the substrate support including
- projections extending from a base of the substrate support and arranged to support the substrate, and
- openings to allow deformation of the substrate towards the base;
- and
- a test print engine to cause printing of a given color patch of the color patches on the substrate, the test print engine to select a location of the given color patch printed onto the substrate, the selecting of the location causing positioning of at least a portion of the given color patch printed on the substrate to be over a given projection of the projections of the substrate support;
- and
- a color determination engine to operate the color sensor to determine color of the given color patch while at least the portion of the given color patch is over the given projection.
A non-transitory tangible computer readable storage medium comprising instructions that, when executed by a processor, cause a printing system to:
- select a location of a color patch printed onto a substrate on a substrate support including projections and openings between the projections, the selecting of the location causing positioning of at least a portion of the color patch printed on the substrate to be over a given projection of the projections of the substrate support, the openings to allow deformation of the substrate towards a support base of the substrate support;
- and
- cause a color sensor to acquire color of the color patch at a sample portion of the color patch, while the sample portion is over the given projection.
A method comprising:
- printing a test color patch on a substrate;
- selecting a location of the test color patch printed onto the substrate on a substrate support including:
- projections extending from a base of the substrate support, the projections arranged to support the substrate, and
- openings between the projections to allow deformation of the substrate towards the base,
- the selecting of the location causing positioning of at least a portion of the test color patch to be over a given projection of the projections of the support substrate when the test color patch is in a color measurement zone;
- and
- determining color of at least the portion of the test color patch while at least the portion of the test color patch is in the color measurement zone.
A method comprising:
- printing a test pattern on a substrate, the test pattern including a plurality of color patches;
- positioning the substrate printed with the test pattern on a substrate support including:
- projections extending from a base of the support, the projections arranged to support the substrate, and
- openings to allow deformation of the substrate towards the support base,
- the positioning being performed such that, for each color patch, a sample portion of the color patch is over a portion of a projection in a color measurement zone;
- and
- determining color of the color patches at the sample portions in the color measurement zone, wherein
- the projections are part of ribs extending on the base,
- the openings correspond to spacings provided between pairs of adjacent ribs, and
- the color patches are printed such that a distance between central portions of adjacent color patches corresponds to a distance between central portions of adjacent ribs.
Dependencies are inferred from the claim text.