Display artifact reduction

1. A method comprising, by a computing system:

accessing an image to be displayed by a display;

determining one or more characteristics associated with a content of the image, wherein the one or more characteristics comprise a spatial frequency of the content in a spatial frequency domain, and wherein the spatial frequency of the content is higher than a pre-determined spatial frequency threshold in the spatial frequency domain;

determining a display persistence time period for the display to display the image based on the one or more characteristics associated with the content of the image; and

configuring the display to display the image using the display persistence time period.

2. The method of claim 1 , wherein the spatial frequency of the content is within a pre-determined spatial frequency range in the spatial frequency domain, and wherein the predetermined spatial frequency range is associated with a Window of Visibility describing a visible range of human visual system in the spatial frequency domain.

3. The method of claim 1 , wherein the spatial frequency of the content is higher than a corresponding spatial frequency of a preceding image, and wherein the display persistence time period for the image is shorter than a previous display persistence time period for the preceding image.

4. The method of claim 1 , wherein the spatial frequency of the content is lower than a corresponding spatial frequency of a preceding image, and wherein the display persistence time period for the image is longer than a previously display persistence time period of the preceding image.

5. The method of claim 1 , wherein the one or more characteristics comprising the spatial frequency of the content of the image are determined based on a spatiotemporal power spectrum of the content of the image.

6. The method of claim 1 , wherein the content of the image is associated with a foveated region encompassing a gazing point of a user, and wherein a second content of the image falling outside the foveated region is excluded from determining the one or more characteristics associated with the content of the image.

7. The method of claim 1 , wherein the display persistence time period for the image comprises an absolute time period value or a display duty cycle in percentage.

8. The method of claim 1 , further comprising:

determining, using a head tracking system, a head motion velocity of a user;

determining a second display persistence time period for the image based on the head motion velocity of the user;

determining an optimized display persistence time period based on the display persistence time period and the second display persistence time period; and

configuring the display to display the image using the optimized display persistence time period.

9. The method of claim 8 , wherein the optimized display persistence time period is a shorter time period selected from the display persistence time period and the second display persistence time period.

10. The method of claim 8 , wherein the optimized display persistence time period is a weighted average of the display persistence time period and the second display persistence time period.

11. The method of claim 1 , further comprising:

determining a contrast level of the content of the image with respect to a background of the image;

determining a second display persistence time period for the image based on the contrast level of the content of the image with respect to the background of the image;

determining an optimized display persistence time based on the display persistence time period and the second persistence display time period; and

configuring the display to display the image using the optimized display persistence time period.

12. The method of claim 1 , wherein the display persistence time period is determined by:

accessing a lookup table that maps the one or more characteristics comprising the spatial frequency of the content of the image to corresponding display persistence time periods; and

comparing the one or more characteristics comprising the spatial frequency of the content of the image to stored data in the lookup table.

13. The method of claim 1 , wherein the display persistence time period is determined using a transfer function at run time.

14. The method of claim 1 , further comprising:

determining one or more second characteristics associated with the content of the image, wherein the one or more second characteristics comprise a temporal frequency in a temporal frequency domain;

determining a frame rate for the image based on the one or more second characteristics associated with the content of the image, wherein the display is configured to display the image using the frame rate.

15. The method of claim 14 , wherein the frame rate is determined based on the one or more characteristics comprising the spatial frequency in the spatial frequency domain and the one or more second characteristics comprising the temporal frequency in the temporal frequency domain.

16. The method of claim 1 , further comprising:

determining an optimized display persistence time period based on (1) the display persistence time period determined based on the one or more characteristics comprising the spatial frequency in the spatial frequency domain, (2) a second display persistence time period determined based on a head motion velocity of a user, and (3) a third display persistence time period determined based on a contrast level between the content of the image and a background; and

configuring the display to display the image using the optimized display persistence time period.

17. The method of claim 1 , wherein the display persistence time period is determined based on a time period threshold to avoid flicker artifacts, and wherein the display persistence time period is longer than the time period threshold.

18. One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

access an image to be displayed by a display;

determine one or more characteristics associated with a content of the image, wherein the one or more characteristics comprise a spatial frequency of the content in a spatial frequency domain, and wherein the spatial frequency of the content is higher than a pre-determined spatial frequency threshold in the spatial frequency domain;

determine a display persistence time period for the display to display the image based on the one or more characteristics associated with the content of the image; and

configure the display to display the image using the display persistence time period.

19. A system comprising:

one or more processors; and

one or more computer-readable non-transitory storage media coupled to one or more of the processors and comprising instructions operable when executed by one or more of the processors to cause the system to:

access an image to be displayed by a display;

determine one or more characteristics associated with a content of the image, wherein the one or more characteristics comprise a spatial frequency of the content in a spatial frequency domain, and wherein the spatial frequency of the content is higher than a pre-determined spatial frequency threshold in the spatial frequency domain;

determine a display persistence time period for the display to display the image based on the one or more characteristics associated with the content of the image; and

configure the display to display the image using the display persistence time period.