Selecting colorant amount for printing
AssigneeHP Indigo B.V.
InventorsDoron Schlumm, Nir Mosenson, Yohanan Sivan, Ziv Berkovich
Life of this patent
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Abstract
A method for selecting a colorant amount for printing is described in which a maximum optical density of an image is identified. The maximum optical density is compared to with a threshold optical density, and when the threshold is exceeded, dot cluster sizes from a first lookup table are selected, otherwise, dot cluster sizes from a second lookup table are selected. A colorant thickness corresponding to the selected dot cluster sizes is selected for printing the image.
Claims15
A method for printing an image on a print medium, comprising:
- identifying a maximum optical density of the image;
- identifying a minimum compliant area size, wherein all areas of the image having a size equal to the identified minimum compliant area size have an average optical density up to the identified maximum optical density;
- selecting a colorant thickness corresponding to the identified minimum compliant area size;
- identifying the optical density of each area of the image having the identified minimum compliant area size;
- identifying a colorant cluster size for each area of the image having the minimum compliant area size and for the selected colorant thickness;
- printing the image on the print medium using the identified cluster sizes.
A method for selecting a colorant amount for printing, comprising:
- identifying a maximum optical density of an image;
- comparing the identified maximum optical density with a threshold optical density;
- selecting cluster sizes from a first lookup table when the identified maximum optical density exceeds the threshold optical density;
- selecting cluster sizes from a second lookup table when the identified maximum optical density does not exceed the threshold optical density;
- selecting the colorant amount that corresponds to the selected cluster sizes;
- printing the image using the selected colorant amount
A printing press, comprising:
- a controller, to receive an image, identify a maximum optical density of the image and select between a standard colorant amount and at least one reduced colorant amount, wherein the standard colorant amount corresponds to a predetermined colorant cluster size table and the at least one reduced colorant amount corresponds to at least one increased cluster size table, respectively;
- an image forming unit, to receive the selected colorant amount and respective cluster size table and print the image on a print medium based on the received colorant amount and respective cluster size table.
Dependencies are inferred from the claim text.