Method and apparatus for color management

• US 7,184,170 B2
• Filed: 03/28/2002
• Issued: 02/27/2007
• Est. Priority Date: 03/28/2002
• Status: Expired due to Fees

• Current Assignee: Archroma IP GmbH
• Original Assignee: Clariant Finance (Bvi) Limited
• Inventors: Agarwal, Niraj
• Primary Examiner(s): Grant, II; Jerome
• Application Number:
  US10/109,122
• Publication Number:
  US 20030184772A1
• Time in Patent Office: 1,797 Days
• Field of Search: 358/1.9, 358/2.1, 358/500, 358/525, 358/515, 358/530, 358/3.29, 358/1.18, 382/162, 382/167, 382/165
• US Class Current: 358/1.9
• CPC Class Codes: G01J 3/46 Measurement of colour; Colour measuring devices, e.g. colorimeters measuring colour temperature G01J5/60
• CPC Class Codes: G01J 3/463 Colour matching
• CPC Class Codes: G06Q 10/10 Office automation; Time management

Abstract

A color matching system including a database of information describing colorants organized into groups of colorants. A computing device identifies at least one recipe of colorants that can reproduce a desired color by selecting at least one group of colorants, identifying possible recipes using the colorants in the group and selecting a best recipe from the possible recipes based on a recipe cost and a calculated metamerism of the recipe.

Claims

1. A color matching system comprising:

a database of information describing colorants, the database being organized into groups of colorants, wherein the groups of colorants are associated with a production method and/or the standard depth of the color standard; and

a computing device that calculates at least one recipe of colorants that can reproduce a desired color by selecting at least one group of colorants, identifies possible recipes using the colorants in the group and selects a best recipe from the possible recipes based on a recipe cost and a calculated metamerism of the recipe.

2. A color matching system comprising:

a database of information describing colorants, the database being organized into groups of colorants;

and a computing device

wherein the computing device comprises;

a CPU; and

a program That causes the CPU to execute the following actions;

receive reflectance data for the desired color;

determine a shade of the desired color;

identifies a group in the database based on the shade of the desired color;

calculates a plurality of recipes using the colorants in the color group;

determines a metric for the created recipes based on recipe cost and recipe metamerism; and

identifies one of the created recipes as a best recipe based on the metric.

3. The color matching system, according to claim 2, wherein the computing device identifies at least a first recipe for use with a first material and a second recipe for use with a second material.

4. The color matching system, according to claim 2

wherein the computing device creates a variety of outputs of the best recipe.

5. The color matching system, as set forth in claim 4, wherein the computing device identifies at least a first recipe for a first desired color for use with a first material, a second recipe for the first desired color for use with a second material, a third recipe for a second desired color for use on the first material, and a fourth recipe for the second desired color for use on the second material, the computing device further causing the printer to output the first, second, third and fourth recipes organized by material or color.

6. The color matching system, according to claim 2, wherein the computing device calculates a best recipe for the desired color for each of a plurality of materials.

7. The color matching system, according to claim 2, wherein the computing device calculates a best recipe for a plurality of desired colors.

8. The color matching system, according to claim 2, wherein the computing device calculates a best recipe for a plurality of desired colors on a plurality of materials.

9. The color matching system, as set forth in claim 8, wherein the computing device operates in a batch mode.

10. A color matching system comprising:

a database of information describing colorants, the database being organized into groups of colorants, wherein the database is organized into groups based on a color of the colorant, a class of the colorant a fabric upon which the colorant is to be used, and a process for dyeing; and

a computing device that calculates at least one recipe of colorants that can reproduce a desired color by selecting at least one group of colorants, identifies possible recipes using the colorants in the group and selects a best recipe from the possible recipes based on a recipe cost and a calculated metamerism of the recipe.

11. The color matching system, as set forth in claim 10, wherein the groups are further based on a shade that can be produced with the colorant.

12. A color matching system comprising:

a database of information describing colorants, the database being organized into groups of colorants, wherein the groups of colorants are associated with a production method and/or the standard depth of the color standard; and

a computing device that calculates at least one recipe of colorants that can reproduce a desired color by selecting at least one group of colorants, identifies possible recipes using the colorants in the group and selects a best recipe, wherein the computing device selects the best recipe by determining if any of the identified recipes meets metamerism conditions set by the user and if such recipes exists, selects the recipe with the least cost.

13. The color matching system, as set forth in claim 12, wherein if none of the identified recipes meets the metamerism conditions, the computing device selects the best recipe by calculating an adjusted cost index and selects the recipe with the best adjusted cost index as the matching recipe.

14. The color matching system, as set forth in claim 13, wherein the adjusted cost index penalizes recipes based on a priority of the group from which the recipe is created.

15. The color matching system, as set forth in claim 13, wherein the adjusted cost index penalizes recipes based on user inputted metamerism value.

16. A color management system for identifying a colorant recipe for producing a desired color on a desired medium, the color management system comprising:

computer processor means for processing data;

storage means for storing data on a storage medium;

first means for identifying one group from among a plurality of groups of colorants that should be able to produce the desired color on the desired medium;

second means for creating a colorant recipe using the colorants in the identified group of colorants that closely matches the desired color on the desired medium;

third means for determining a metric for the created recipe based on recipe cost and recipe metamerism;

fourth means for identifying the created recipe as the identified colorant recipe if the metric has a predetermined relationship with a user provided input;

fifth means for organizing a series of identified colorant recipes based on the color produced by each colorant recipe and the material upon which each colorant recipe is to be used; and

sixth means for creating a variety of outputs about the series of identified colorant recipes.

17. A method of color management comprising:

identifying one group from among a plurality of groups of colorants that should be able to produce a desired color on the desired medium;

creating a recipe using the colorants in the identified group of colorants that closely matches the desired color on the desired medium;

determining a metric for the created recipe based on recipe cost and recipe metamerism; and

identifying the created recipe as the identified colorant recipe if the metric has a predetermined relationship with a user provided input.

18. A method of producing engineered color standard comprising;

receiving reflectance data regarding a desired color;

determining a depth of shade of the desired color;

identifying at least one group of colorants associated with the depth of shade;

automatically identifying a single recipe using the colorants in the at least one group of colorants that can produce the desired color on a desired material; and

creating a variety of outputs of the recipe.

19. A method of determining a colorant recipe for each of a plurality of materials, the method comprising:

receiving an indication of a desired color and a plurality of desired materials;

for each desired material;

calculating at least one colorant recipe, using stored information about colorants, that closely matches the desired color on the desired material;

determining an index based on desired characteristics of the desired material as dyed by the calculated colorant recipe; and

identifying a calculated recipe as a colorant recipe if the index has a predetermined relationship with a user provided input; and

for each material for which a colorant recipe was identified outputting an indication of the material and the colorant recipe.

20. A method of producing engineered color standard comprising:

receiving reflectance data regarding a desired color;

determining a depth of shade of the desired color;

identifying at least one group of colorants associated with the depth of shade;

automatically identifying a single recipe using the colorants in the at least one group of colorants that can produce the desired color on a desired material; and

printing the recipe.

21. The method of claim 20 wherein the step of printing comprises:

printing the recipe on a card.

22. The method of claim 21 further comprising:

attaching a sample of material to the card.