ADAPTIVE CONTEXTUAL FILTERING BASED ON OBSERVER COLORBLINDNESS CHARACTERISTICS

• US 20110018894A1
• Filed: 10/05/2010
• Published: 01/27/2011
• Est. Priority Date: 06/26/2007
• Status: Active Grant

• Current Assignee: Zhigu Holdings Limited
• Original Assignee: Microsoft Corporation
• Inventors: Hitchcock, Gregory C., Wade, Geraldine, Matskewich, Tanya
• Granted Patent: US 8,013,860 B2
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G06T 2207/20012 Locally adaptive
• CPC Class Codes: G06T 5/00 Image enhancement or restoration
• CPC Class Codes: G06T 5/20 using local operators

Abstract

Selectively applying graphical filtering to characters can include the identification of observer characteristics and characteristics associated with different portions of the character. Corresponding filters can then be identified and selectively applied to the characters and, in some instances, without applying the filter to the entire character.

Claims

1. A method implemented by a computing system having a processor of selectively applying graphical filtering to a character, the method comprising:

accessing a character to be rendered;

identifying an observer characteristic, the observer characteristic identifying whether the observer has dichromatic vision or trichromatic vision;

based on the observer characteristic, selecting and applying a filter to the character to be rendered; and

displaying the character after applying the filter to the character.

2. The method of claim 1, wherein the filter is selectively applied to only a limited portion of the character and without applying the filter to the entire character.

3. The method of claim 2, wherein the limited portion of the character is defined by a geographic zone.

4. The method of claim 2, wherein the limited portion of the character is limited by a defined typographical characteristic.

5. The method of claim 4, wherein the typographical characteristic and the limited portion consists of a serif, a stroke, a stem or a diagonal of the character.

6. A computer storage medium comprising stored computer executable instructions that, when executed by one or more processors of a computing system, cause the following method to be performed:

accessing a character to be rendered;

identifying a limited portion of the character, the limited portion of the character consisting of less than the entire character and being defined by a particular characteristic;

selecting a filter that has been pre-specified for the particular characteristic; and

applying the filter to the limited portion of the character, while refraining from applying the filter to the entire character, wherein the filter includes parameters directed to colorblindness.

7. The computer storage medium of claim 6, wherein the filter includes parameters directed to models of human visual perception that are based on a distinction between dichromatic visual perception and trichromatic visual perception.

8. The computer storage medium of claim 6, wherein the method further includes applying an additional filter that has been pre-specified for another characteristic of a different limited portion of the character to the different limited portion of the character and while refraining from applying the additional filter to the entire character.

9. The computer storage medium of claim 6, wherein the particular characteristic comprises one or more of a structural, chromatic, typographical or geometrical characteristic corresponding to the limited portion of the character.

10. The computer storage medium of claim 9, wherein the particular characteristic comprises a typographical characteristic.

11. The computer storage medium recited in claim 10, wherein the particular characteristic is defined as either a stroke, a serif or a counter space corresponding to the character.

12. The computer storage medium recited in claim 10, wherein the particular characteristic is a typographical characteristic comprising one of a serif, a stroke, a stem and a diagonal and such that identifying the limited portion of the character includes distinguishing between at least said serif, stroke, stem or diagonal, and wherein the method further includes selecting the filter to be applied to the limited portion of the character based at least in part on whether the particular characteristic is distinguished to be said serif, stroke, stem or diagonal.

13. The computer storage medium of claim 9, wherein the particular characteristic comprises a geometrical characteristic.

14. The computer storage medium of claim 13, wherein the geometrical characteristic comprises a distance between strokes.

15. The computer storage medium of claim 9, wherein the particular characteristic comprises a chromatic characteristic.

16. The computer storage medium of claim 6, wherein the particular characteristic is defined by a user selection.

17. The computer storage medium of claim 6, wherein identifying the limited portion of the character comprises identifying a zone of the object.

18. The computer storage medium of claim 6, wherein the filter is pre-selected by human determination and defined in filter hinting language definition associated with the character.

19. The computer storage medium of claim 6, wherein the filter includes parameters directed to human recognition specific to a class of objects.

20. A computing system comprising:

a processor;

a memory coupled to the processor, wherein the memory comprises computer executable instructions that when executed by the processor cause the following to be performed by the computing system;

accessing a character to be rendered;

identifying an observer characteristic;

identifying a limited portion of the character, the limited portion of the character consisting of less than the entire character and being defined by a particular characteristic;

selecting a filter that has been pre-specified for the particular characteristic and the observer characteristic; and

applying the filter to the limited portion of the character, while refraining from applying the filter to the entire character.