Display of effect coatings on electronic display devices

Patent metadata

Field	Value
Publication number	US-9791318-B2
Application number	US-201013265643-A
Country	US
Kind code	B2
Filing date	Apr 26, 2010
Priority date	Apr 28, 2009
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The invention relates to a method of displaying an image of an effect coating having texture and color properties on an electronic display device, using measured color data and measured texture data as input to generate the image, wherein the textured image is displayed with visual color properties which are maintained on a prescribed level independent of possible variations in texture properties.

First claim

The invention claimed is:

1. A method of displaying an image of an effect coating having texture and color properties on an electronic display device under the control of a data processing unit, the method comprising generating the image by using measured color data and measured texture data as input for the data processing unit, and displaying the textured image with visual color properties which are maintained on a prescribed level independent of possible variations in texture properties, such that the perceived color is not influenced by the specific texture, wherein the method comprises,
a) first generating a grayscale image with prescribed texture properties, wherein the texture properties are selected from the group consisting of diffuse coarseness, glint impression, or a combination of these, and
b) second, converting the generated grayscale textured image into a textured image with prescribed color properties,
wherein in a) the texture properties are a combination of diffuse coarseness and glint impression, and the diffuse coarseness image is resized by means of an interpolating resize algorithm, the glint impression image is resized by a non-interpolating resize algorithm, and subsequently the resized diffuse coarseness image and glint impression image are combined to a resized grayscale image with prescribed texture properties, and wherein the degree of resizing depends on the viewer's distance to the displayed effect coating.

2. The method according to claim 1 , wherein texture data measured under at least two different conditions are used as input to generate the grayscale image with prescribed texture properties, wherein the at least two different conditions are selected from the group consisting of illumination conditions, observations conditions, and combinations thereof.

3. The method according to claim 2 , wherein the at least two different illumination conditions are implemented by light sources having different spectral output.

4. The method according to claim 3 , wherein the at least two different illumination conditions are implemented by light having different degrees of directionality.

5. The method according to claim 2 , wherein the at least two different illumination conditions are implemented by light having different degrees of directionality.

6. The method according to claim 1 , wherein the image is displayed under at least two different conditions, wherein the at least two different conditions are selected from the group consisting of illumination conditions, observations conditions, and combinations thereof.

7. A method of displaying an image of an effect coating having texture and color properties on an electronic display device, comprising
a) visually comparing the degree of matching of texture and color properties of a target coating on a substrate having texture and color properties with two or more physical samples of candidate coatings,
b) selecting the physical sample of the candidate coating having the best match with the target coating,
c) visually determining the deviations in texture and color between the target coating and the physical sample of the candidate coating selected in b),
d) displaying an image of the physical sample of the candidate coating selected in b) and at least one alternative potential candidate coating, using the method according to claim 1 ,
e) selecting, based on the deviations determined in c), the best matching candidate coating from the displayed images.

8. The method according to claim 1 , wherein the displayed image is linked to a corresponding coating recipe and wherein upon a modification of the coating recipe, changes of texture and color properties are visualized.

9. The method according to claim 1 , wherein images of at least two effect coatings are displayed simultaneously.

10. The method according to claim 9 , wherein the images of at least two effect coatings include the image of a target coating to be matched and the image of a candidate coating which potentially matches the visual properties of the target coating.

11. A method of selecting a candidate coating having texture and color properties matching the texture and color properties of a target coating on an article, comprising
a) displaying an image of the target coating and an image of at least one candidate coating on an electronic display device using the method according to claim 1 ,
b) establishing the degree of matching of color and texture properties between the target coating and at least one candidate coating by visually comparing the images displayed in a), and
c) selecting a candidate coating that has an acceptable degree of matching.

12. The method according to claim 11 , wherein the image of the candidate coating is supplemented by textual or graphical indications of the degree of matching between the target coating and the candidate coating.

13. The method according to claim 11 , wherein the images of at least two candidate coatings are displayed simultaneously on the electronic display device.

14. The method according to claim 11 , wherein differences in the properties of the target coating and at least one candidate coating are amplified in the displayed images, wherein the differences in properties are selected from the group consisting of differences in texture, differences in color, and combinations thereof.

15. The method according to claim 11 , wherein the images of the target coating and at least one candidate coating are displayed for a range of angles, wherein the range of angles are selected from the group consisting of illumination angles, observation angles, and combinations thereof, and wherein the range of displayed angles includes those angles under which the difference in properties between the target coating and at least one candidate coating reaches a maximum, wherein the properties are selected from the group consisting of texture, color, and combinations thereof.

16. A system for displaying an image of an effect coating having texture and color properties on an electronic display device, the system comprising an electronic display device under the control of a data processing unit which is configured to use measured color data and measured texture data as input to generate a textured image with visual color properties which are maintained on a prescribed level independent of possible variations in texture properties, such that the perceived color is not influenced by the specific texture, wherein the system is further configured to,
a) generate a grayscale image with prescribed texture properties, wherein the texture properties are selected from the group consisting of diffuse coarseness, glint impression, or a combination of these, and
b) convert the generated grayscale textured image into a textured image with prescribed color properties,
wherein the texture properties in a) are a combination of diffuse coarseness and glint impression, and the diffuse coarseness image is resized by means of an interpolating resize algorithm, the glint impression image is resized by a non-interpolating resize algorithm, and subsequently the resized diffuse coarseness image and glint impression image are combined to a resized grayscale image with prescribed texture properties, and wherein the degree of resizing depends on the viewer's distance to the displayed effect coating.

17. The method according to claim 12 , wherein the images of at least two candidate coatings are displayed simultaneously on the electronic display device.

18. The method according to claim 14 , wherein the images of the target coat

Assignees

• Kirchner Eric Jacob Jan
• Gottenbos Roelof Johannes Baptist
• Half André
• Van Der Lans Ivo Bernardus Nicolaas
• Akzo Nobel Coatings Int Bv

Inventors

• Kirchner Eric Jacob Jan
• Gottenbos Roelof Johannes Baptist
• Half André
• Van Der Lans Ivo Bernardus Nicolaas

Classifications

• G06T11/10 Primary

  Texturing; Colouring; Generation of textures or colours (retouching, inpainting or scratch removal G06T5/77) · CPC title

• G01J3/504

  Goniometric colour measurements, for example measurements of metallic or flake based paints · CPC title

• G01J3/46 Primary

  Measurement of colour; Colour measuring devices, e.g. colorimeters (measuring colour temperature G01J5/60) · CPC title

• G06T11/001

  Physics · mapped topic

• G01J3/463

  Colour matching · CPC title