Systems and method for masking stitch errors
AssigneeXerox Corporation
InventorThomas N. Taylor
Life of this patent
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Abstract
It is desirable to cover up or mask the stitch joint error. This invention provides systems and methods for indexing the position of a sheet of recording medium conventionally and then measuring the position of the sheet of recording medium accurately by a sensor. Data in the printhead is shifted so that the data is accurately aligned within a predetermined pixel accuracy to the known paper position. This invention covers up the resulting stitch joint error by modifying the pixels at the stitch joint interface to mask the apparent error.
Claims34
A method of reducing stitch joint error, comprising:
- printing a first swath of image data on a fluid recording medium;
- advancing the fluid recording medium to an advanced position;
- detecting the advanced position of the fluid recording medium;
- determining a relative position of the fluid recording medium with respect to a printhead;
- determining if a stitch joint error will occur;
- shifting, if a stitch joint error will occur, the image data in the printhead for a next swath to be printed;
- and
- firing the image data from one or more nozzles in the printhead to print the next swath of image data.
An stitch joint error reducing apparatus, comprising:
- a printhead that prints a first swath of image data on a fluid recording medium;
- a device for advancing the fluid recording medium;
- a sensor that detects a position of the fluid recording medium;
- and
- a controller for determining a relative position of the fluid recording
- medium with respect to a printhead and determining if a stitch joint error
- will occur, wherein the controller shifts image data in the printhead if a
- stitch joint error will occur and prints a next swath of image data.
Dependencies are inferred from the claim text.