Method and system for scaling with dot gain control
AssigneeInternational Business Machines Corporation
InventorsLarry Ernst, Hong Li, Yue Qiao, Mikel Stanich, Chai Wu
Life of this patent
Estimating the term…
Abstract
A method (and system) for changing spatial resolution of an image includes systematically creating an image scaling look-up table including at least one pixel replacement pattern and applying a scaling algorithm to modify the image using the image scaling look-up table, thereby allowing a user to scale binary images with easy control of dot gain, output bit depth and other printer parameters.
Claims19
A method for changing a spatial resolution of an image, comprising:
- creating an image scaling look-up table comprising at least one pixel replacement pattern;
- and
- applying a scaling algorithm to modify the image using said look-up table.
A method for non-integer scaling of an image, comprising:
- creating a first image scaling look-up table comprising at least one pixel replacement pattern, based on a first approximate integer scaling ratio for a first direction and a first approximate integer scaling ratio for a second direction;
- creating a second multibit look-up table comprising at least one pixel replacement pattern, based on a second approximate integer scaling ratio for a first direction and a second approximate integer scaling ratio for a second direction;
- and
- applying a scaling algorithm to modify the image alternately using said first look-up table and said second look-up table.
A computer system for scaling an image, comprising:
- a creation unit that creates an image scaling look-up table comprising at least one pixel replacement pattern;
- and
- an applying unit that applies a scaling algorithm to modify the image using said image scaling look-up table.
Dependencies are inferred from the claim text.