# US 8,570,599 B2 · Method of characterizing an imaging system

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- Number: US 8,570,599 B2
- Document ID: US8570599B2
- Status: Granted
- Kind: B2
- Application number: 13/165,137
- Filed: 2011-06-21
- Published: 2012-12-27
- Granted: 2013-10-29
- Earliest claimed: 2011-06-21
- Assignees: Eastman Kodak Company
- Applicants: Christopher J. Edge
- Inventors: Christopher J. Edge
- Web page: https://patentgrep.com/patent/US8570599B2

## CPC

- H04N 1/6033: {using test pattern analysis (H04N1/6055 takes precedence)}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A method of characterizing an imaging system is described includes printing a color chart having a plurality of predetermined color patches; measuring the color patches to obtain colorimetric data; initializing a Neugebauer model with the Neugebauer solids of said colorimetric data; optimizing the global parameters of the Neugebauer model; optimizing the parameters associated with Demichel terms based on the Neugebauer primary associated with the Demichel term; optimizing parameters that vary with device coordinates; and creating a characterization file for the imaging system.

## Claims

### Claim 1

A method of replicating color images created on a first printer on a second printer or monitor comprising:
printing a color chart having a plurality of predetermined color patches with the first printer;
measuring said color patches to obtain colorimetric data;
transmitting the colorimetric data to a computer;
initializing a Neugebauer model with said colorimetric data;
optimizing global parameters of the Neugebauer model on the computer;
optimizing parameters of the Neugebauer model associated with Neugebauer primaries;
optimizing parameters of the Neugebauer model that vary with the first printer coordinates;
generating a first characterization file for the first printer;
obtaining a second characterization file for the second printer or monitor;
obtaining image data for first image to be replicated;
converting the image data from the first characterization to the second characterization; and
creating second image with the converted image data on the second printer or the monitor.

### Claim 2 (depends on 1)

The method of claim 1 wherein said the first printer is a halftone printer.

### Claim 3 (depends on 1)

The method of claim 1 wherein the characterization files are ICC profiles.

### Claim 4 (depends on 1)

The method of claim 1 wherein optimizing comprises:
varying the parameters in order to reduce the error between the Neugebauer model prediction and the measured colorimetric data.

### Claim 5

A method of proofing color images to be printed on a first printer on a second printer or monitor comprising:
printing a color chart having a plurality of predetermined color patches with the first printer;
measuring said color patches to obtain colorimetric data;
transmitting the colorimetric data to a computer;
initializing a Neugebauer model with said colorimetric data;
optimizing global parameters of the Neugebauer model on the computer;
optimizing parameters of the Neugebauer model associated with Neugebauer primaries;
optimizing parameters of the Neugebauer model that vary with the first printer coordinates;
generating a first characterization file for the first printer;
obtaining a second characterization file for the second printer or monitor;
obtaining image data for an image to be proofed;
converting the image data from the first characterization to the second characterization; and
creating a second image with the converted image data on the second printer or the monitor.