Method to remove edge artifacts from skewed originals
AssigneeXerox Corporation
InventorWilliam A. Cook
Life of this patent
Estimating the term…
Abstract
A system and method are providing for implementing the blanking of an image of a skewed original document in a full image area where the blanking region is adjusted line-by-line and pixel-by-pixel, allowing an edge at an arbitrary angle to be masked. This system and method allow for skew blanking regions surrounding an image of a skewed original document so that no data from the original document is lost, by initially reducing the image of the original document to fit in the full image area, and all background artifacts from the platen show through and dirt from the top cover of the digital copier are removed.
Claims21
In a digital copier having predetermined platen parameters, a method for removing background artifacts from a full image area comprising:
- pre-scanning the full image area for predetermined values representing a disposition of an original document, and storing the predetermined values in a digital copier memory;
- scanning the full image area;
- identifying selected regions in the full image area during said scanning based on said predetermined values;
- and
- performing a blanking technique during said scanning to replace pixel values in said selected regions.
A xerographic imaging apparatus which blanks selected regions in a full image area, the apparatus comprising:
- means for pre-scanning the full image area for predetermined values representing a disposition of an original document and storing the predetermined values in a memory;
- means for scanning the full image area;
- means for identifying the selected regions of the full image area during said scanning based on said predetermined values;
- and
- means for performing a blanking technique during said scanning which replaces pixel values in said selected regions with a predetermined pixel value.
A method for blanking regions of an imaging area comprising:
- storing parameters representative of a disposition of an original document in the imaging area of a xerographic imaging device;
- based on the parameters, determining if the original document is skewed in the imaging area;
- scanning the imaging area including the original document;
- correlating the stored parameters during scanning with scanned imaging area including the original document;
- defining selected regions during scanning surrounding the image of the original document in the full image area;
- and,
- blanking pixels during said scanning pixel-by-pixel and line-by-line in the selected regions.
Dependencies are inferred from the claim text.