Automated enhancement of print quality based on feature size, shape, orientation, and color
AssigneeXerox Corporation
InventorsReiner Eschbach, Robert P. Loce
Life of this patent
Estimating the term…
Abstract
A processing system for preparing a plural separation document image for printing, including small feature enhancement of the image, preventing halftoning damage thereto, including detecting small features in the document image; and in a detected small feature region, setting any output image signals corresponding to said small feature region to ON in at least one of the at least two separations.
Claims21
A method for preparing a color document image for reproduction including at least two separations corresponding to colorants for reproduction of the image, and including small feature enhancement of the image, preventing halftoning damage thereto, including
- detecting small features in said image;
- and
- in a detected small feature region, setting any output image signals corresponding to said small feature region to ON in at least one of said at least two separations.
A method for preparing a color document image, including text, for reproduction including at least two separations corresponding to colorants for reproduction of the image, and including small text enhancement of the image, preventing halftoning damage thereto, including
- determining whether said text is less than a predetermined size;
- and
- for text detected to be less than a predetermined size, performing color modification thereon by setting any output image signals corresponding to said text to ON in at least one of said at least two separations.
A method for preparing a color document image for reproduction including feature protection for image features susceptible to halftoning damage, preventing halftoning damage thereto, including
- detecting feature regions in the image susceptible to halftoning damage in said image from image attributes thereof;
- and
- in a detected feature regions, controlling any color transform to prevent halftone damage to said features.
A method of halftoning colored document images, including small features, said method including:
- receiving said colored document images, each colored document image defined by at least two separations, each separation in turn defined by gray valued pixels;
- identifying in said colored document images, any areas including representations of small features, which would be damaged by halftone representation thereof;
- for said small features areas, determining in which of said at least two separations gray valued pixels could be turned substantially ON with minimum color fidelity impact;
- turning gray valued pixels substantially ON in said determined separation.
A method for preparing a color document image for reproduction including feature protection for image features susceptible to halftoning damage, preventing halftoning damage thereto, including
- detecting small feature regions in the image;
- and
- in a detected small feature regions, controlling any color transform to produce a preferred color rendition for the small feature.
Dependencies are inferred from the claim text.