System and method for controlling clustered halftone dot gain
OwnerStephen Herroninventor
Life of this patent
Estimating the term…
Abstract
A system for characterizing dot gain in pixel-based document rendering devices, such as a printer, receives information relative to current dot size characteristics of the device relative to various tonal levels. This information is compared to stored information to determine a change in dot size. This comparison information is used in conjunction with data representative of cluster dot radius information and dot perimeter information to allow for generation of feedback to linearize output of the document rendering device.
Claims14
A system for adjusting document output characteristics of a pixel-based document rendering device comprising:
- adjustment data calculation means including,
- dot density data receiving means adapted for receiving dot density data representative of a change in dot density associated with a plurality of tonal levels on an associated document rendering device;
- cluster density data receiving means adapted for receiving cluster density data representative of a change in cluster dot radius levels associated with a plurality of tonal levels on the associated document rendering device;
- dot perimeter data receiving means adapted for receiving dot perimeter density data representative of a change in dot perimeter associated with a plurality of tonal levels on the associated document rendering device;
- and
- adjustment data calculation means adapted for calculating adjustment data in accordance with the dot radius data, the dot density data and the dot perimeter density data;
- and
- means adapted for communicating adjustment data to the associated document rendering device.
A method for adjusting document output characteristics of a pixel-based document rendering device comprising the steps of:
- receiving dot density data representative of a change in dot density associated with a plurality of tonal levels on an associated document rendering device;
- receiving cluster density data representative of a change in cluster dot radius levels associated with a plurality of tonal levels on the associated document rendering device,
- receiving dot perimeter density data representative of a change in dot perimeter associated with a plurality of tonal levels on the associated document rendering device, and
- calculating adjustment data in accordance with the dot radius data, the dot density data and the dot perimeter density data;
- and
- communicating adjustment data to the associated document rendering device.
Dependencies are inferred from the claim text.