Automated icon accessibility assessment algorithm and tool

Patent metadata

Field	Value
Publication number	US-11636632-B2
Application number	US-202117551462-A
Country	US
Kind code	B2
Filing date	Dec 15, 2021
Priority date	Dec 29, 2017
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Systems, methods, and computer-readable media for providing tools to validate color contrast are provided. To do so, three discrete color check processes are performed to ensure a user is able to identify when an icon is at risk of being inaccessible by some users. A border score considers each pixel at the edge of an icon compared to the background in which it is placed. An area score considers each discrete pixel of an icon compared to the background in which it is placed. A grid score considers a subdivision of an icon compared to the background in which it is placed. Using each of these three independent process, a summative score is provided. The summative score categories the icon into a risk level. Depending on the risk level, the icon may need to be refined to ensure it becomes more accessible.

First claim

The invention claimed is:

1. A system for providing an icon accessibility tool, the system comprising:
a processor; and
a computer storage medium storing computer-usable instructions that, when used by the processor, cause the processor to:
receive an image containing an icon;
determine an area score for the icon, the area score being a percentage of identified opaque pixels with relative luminance above a minimum contrast ratio;
determine a border score for the icon, the border score being a percentage of identified opaque border pixels with relative luminance above the minimum contrast ratio;
determine a grid score, the grid score being a percentage of grid squares that have a percentage of opaque pixels greater than an area threshold;
provide a plurality of composite scores to a user for multiple varying backgrounds, the plurality of composite scores derived from the area score, the border score, and the grid score for the icon with respect to a corresponding background of the multiple varying backgrounds; and
enable the user to select the icon in accordance with the background having a lowest risk composite score.

2. The system of claim 1 , further comprising converting the image containing the icon into arrays of red green blue alpha (RGBA) values.

3. The system of claim 2 , further comprising, dividing the image into arrays of RBGA values corresponding to grid squares.

4. The system of claim 1 , wherein the relative luminance of the identified opaque pixels is determined with respect to a background color of the one or more backgrounds.

5. The system of claim 4 , wherein the composite score indicates a risk of the icon not being accessible when placed upon a corresponding background color.

6. The system of claim 1 , further comprising upon receiving a user interaction with a background color of the backgrounds, provide an indication highlighting which part of the icon is at risk of being inaccessible.

7. The system of claim 1 , wherein the area threshold and the minimum contrast ratio are defined by a user.

8. A computerized method for providing an icon accessibility tool, the method comprising:
receiving an image containing an icon;
determining an area score for the icon, the area score being a percentage of identified opaque pixels with relative luminance above a minimum contrast ratio;
determining a border score for the icon, the border score being a percentage of identified opaque border pixels with relative luminance above the minimum contrast ratio;
determining a grid score, the grid score being a percentage of grid squares that have a percentage of opaque pixels greater than an area threshold;
providing a plurality of composite scores to a user for multiple varying backgrounds, the plurality of composite scores derived from the area score, the border score, and the grid score for the icon with respect to a corresponding background of the multiple varying backgrounds; and
enabling the user to select the icon in accordance with the background having a lowest risk composite score.

9. The method of claim 8 , further comprising converting the image containing the icon into arrays of red green blue alpha (RGBA) values.

10. The method of claim 9 , further comprising, dividing the image into arrays of RBGA values corresponding to grid squares.

11. The method of claim 8 , wherein the relative luminance of the identified opaque pixels is determined with respect to a background color of the one or more backgrounds.

12. The method of claim 11 , wherein the composite score indicates a risk of the icon not being accessible when placed upon a corresponding background color.

13. The method of claim 8 , further comprising upon receiving a user interaction with a background color of the backgrounds, provide an indication highlighting which part of the icon is at risk of being inaccessible.

14. The method of claim 8 , wherein the area threshold and the minimum contrast ratio are defined by a user.

15. One or more computer storage media having computer-executable instructions embodied thereon that, when executed by a computer, causes the computer to perform operations to provide an icon accessibility tool, the operations comprising:
receiving an image containing an icon;
determining an area score for the icon, the area score being a percentage of identified opaque pixels with relative luminance above a minimum contrast ratio;
determining a border score for the icon, the border score being a percentage of identified opaque border pixels with relative luminance above the minimum contrast ratio;
determining a grid score, the grid score being a percentage of grid squares that have a percentage of opaque pixels greater than an area threshold;
providing a plurality of composite scores to a user for multiple varying backgrounds, the plurality of composite scores derived from the area score, the border score, and the grid score for the icon with respect to a corresponding background of the multiple varying backgrounds; and
enabling the user to select the icon in accordance with the background having a lowest risk composite score.

16. The media of claim 15 , further comprising:
converting the image containing the icon into arrays of red green blue alpha (RGBA) values; and
dividing the image into arrays of RBGA values corresponding to grid squares.

17. The media of claim 15 , wherein the relative luminance of the identified opaque pixels is determined with respect to a background color of the one or more backgrounds.

18. The media of claim 17 , wherein the composite score indicates a risk of the icon not being accessible when placed upon a corresponding background color.

19. The media of claim 15 , wherein the area threshold and the minimum contrast ratio are defined by a user.

Assignees

• Cerner Innovation Inc
• Cemer Innovation Inc

Inventors

• Noll Aaron
• Wilson Eric
• Rajendran Mayur
• Lende Alex
• Fowler Anna-Therese
• Vaglio Jay

Classifications

• G06T11/10 Primary

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

• G06T2207/10024

  Color image · CPC title

• G06V10/25

  Determination of region of interest [ROI] or a volume of interest [VOI] · CPC title

• G06V2201/02

  Recognising information on displays, dials, clocks · CPC title

• G06V10/56

  relating to colour · CPC title