Method for calibration of a laser thermal halftone printer
AssigneeEastman Kodak Company
InventorCraig Iannazzi
Life of this patent
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Abstract
A method of calibrating a printing system is described herein. The method includes imaging a test pattern. The test pattern includes a set of densities. Each density is based on a plurality of exposures which have been randomized thereby forming an imaged test pattern. The method further includes scanning the densities of the imaged test pattern thereby forming a dataset. In one embodiment, the density of the test pattern is made from a thermal dye donor. In another embodiment, the density of the test pattern comprises multiple colors. Then, the method includes analyzing the dataset to identify outlier data. The method then includes calibrating an adjustable density printing system using the polynomial calibration curve.
Claims18
A method of calibrating a printing system comprising:
- a. imaging a test pattern wherein the test pattern comprises a set of densities, wherein each density based on a plurality of exposures which have been randomized thereby forming an imaged test pattern;
- b. scanning the densities of the imaged test pattern thereby forming a dataset;
- c. analyzing the dataset to identify outlier data;
- d. if outlier data is identified, then the test pattern undergoes a second scan, a second dataset is formed and the second dataset is analyzed for outlier data;
- e. if no outlier data is identified, a first density point and a second density point of the dataset are computed to form an array of exposures versus a density between the first and second density points;
- f. forming a polynomial calibration curve from the array of exposures and the density array;
- g. calibrating an adjustable density printing system using the polynomial calibration curve.
Dependencies are inferred from the claim text.