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US 2014/0210888 A1Published application
Method and apparatus for processing image data
AssigneeHewlett-Packard Development Company, L.P.
InventorsAndreas Müller, Utpal Kumar Sarkar
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Abstract
A method and apparatus for processing image data is described. An example of a method involves applying a first mask to image data corresponding to an overlap zone of a first print region, the first mask representing a first mask pattern and applying a second mask to image data corresponding to the overlap zone of a second print region, the second mask representing a second mask pattern. Each of the first and second mask patterns define a periodic variation in a dimension corresponding to the first direction. First and second mask patterns for at least a second image plane are spatially separated in the dimension corresponding to the first direction in relation to first and second patterns of a first image plane.
Claims20
A method comprising:
- receiving image data corresponding to at least a portion of an image, having a width in a first direction and a height in a second direction, to be printed, wherein the image data includes a first print region to be deposited on a first pass of at least one printhead of a plurality of printheads and a second print region to be deposited on a next pass of the at least one of the plurality of printheads subsequent to a relative movement of the at least installed one printhead and a print medium in the second direction the first print region and the second print region spatially overlapping in the second direction in an overlap zone;
- applying a first mask, including a first mask pattern, to image data corresponding to at least the overlap zone of the first print region, wherein the first mask pattern determines which pixels of a number of pixels in the overlap zone will be deposited by an end portion of the at least one printhead of a plurality of printheads on the first pass;
- and
- applying a second mask, including a second mask pattern, to image data corresponding to at least the overlap zone of the second print region, wherein the second mask pattern determines which pixels of a number of pixels in the overlap zone will be deposited by an opposing end portion of the at least one printhead of a plurality of printheads on a second pass,
- wherein each of the first and second mask patterns define a periodic variation in a dimension corresponding to the first direction,
- wherein the first and second mask patterns are arranged such that a superposition of the first print region and the second print region in the overlap zone corresponds to said portion of the image, and
- wherein first and second mask patterns corresponding to at least a second printhead are spatially separated in the dimension corresponding to the first direction in relation to first and second mask patterns corresponding to a first printhead.
4 more elements
An apparatus comprising:
- a computing device interface for receiving image data corresponding to at least a portion of an image, having a width in a first direction and a height in a second direction, to be printed on a printing device, wherein the image data includes a first print region to be deposited on a first pass of at least one printhead of a plurality of printheads and a second print region to be deposited on a next pass of the at least one of the plurality of printheads subsequent to a relative movement of the at least one printhead and a print medium in the second direction, the first print region and the second print region spatially overlapping the second direction in an overlap zone;
- a controller to respectively apply a first mask function, including a first mask pattern, and a second mask function, including a second mask pattern, to image data corresponding to at least the overlap zone of the first and second print regions, wherein the first and second mask patterns determine whether a pixel in the overlap zone is deposited by an end portion of at least one printhead of the plurality of printheads on the first pass of the plurality of printheads or by opposing end portion of the at least one printhead of the plurality of printheads during the next pass of the plurality of printheads
- wherein each of the first and second mask patterns defining a periodic variation in a dimension corresponding to the first direction,
- wherein the first and second mask patterns are arranged such that a superposition of the first print region and the second print region in the overlap zone corresponds to said portion of the image and
- wherein the controller selects different mask functions for each of at least two printheads, first and second mask functions for at least a second printhead respectively implementing first and second mask patterns, said mask patterns being spatially separated in the dimension corresponding to the first direction in relation to first and second mask patterns for the first printhead.
2 more elements
Dependencies are inferred from the claim text.