See-through computer display systems

1. A wearable head device comprising:

a see-through display adapted to present content;

a sensor adapted to detect a visual property of a surrounding environment visible through the see-through display;

an eye-imaging camera; and

a processor adapted to:

determine, via the eye-imaging camera, a gaze target, wherein the gaze target, a portion of the surrounding environment, and a portion of the content are visible via a region of the see-through display;

compare a detected visual property of the portion of the surrounding environment to a visual property of the portion of the content;

determine, based on the comparison, whether a viewability of the content is impaired;

determine whether a maximum brightness of the see-through display is below a viewability threshold;

in accordance with a determination that the viewability is impaired and further in accordance with a determination that the maximum brightness of the see-through display is below the viewability threshold;

switch a configuration of a color palette associated with the content; and

decrease, based on a size of a pupil of a user, a brightness of the content, the size determined via the eye-imaging camera; and

in accordance with a determination that the viewability is not impaired or in accordance with a determination that the maximum brightness of the see-through display is not below the viewability threshold, forgo:

switching the configuration of the color palette; and

decreasing the display brightness.

2. The wearable head device of claim 1 , wherein the content comprises video content.

3. The wearable head device of claim 1 , wherein:

in accordance with the determination that the viewability is impaired and further in accordance with the determination that the maximum brightness of the see-through display is below the viewability threshold, the processor is further adapted to adjust one or more display attributes of the content, and

the one or more display attributes comprise one or more of a hue, a saturation, a color value, a color balance, a size, a contrast, a spatial frequency, a resolution, and a sharpness.

4. The wearable head device of claim 1 , further comprising a sensor configured to detect a motion of the user, and

wherein the determining whether the viewability of the content is impaired is further based on the detected motion.

5. The wearable head device of claim 1 , further comprising a sensor configured to detect an environmental condition, and

wherein the determining whether the viewability of the content is impaired is further based on the detected environmental condition.

6. The wearable head device of claim 1 , further comprising a sensor configured to detect a location of the user, and

wherein the determining whether the viewability of the content is impaired is further based on the detected location.

7. The wearable head device of claim 1 , wherein the processor is further adapted to determine a user scenario in which the wearable head device is operated, and wherein the determining whether the viewability of the content is impaired is further based on the determined user scenario.

8. The wearable head device of claim 7 , wherein the user scenario includes one or more of the user driving, the user sitting, the user walking, the user jogging, and the user receiving instructions.

9. The wearable head device of claim 7 , wherein the wearable head device is configured to operate in a night vision mode.

10. The wearable head device of claim 1 , wherein the determining whether the viewability of the content is impaired is further based on a property of the content, the property including one or more of a contrast value, a color value, a presence of still pictures, a presence of moving pictures, a presence of an icon, a presence of video content, a pixel location, and a pixel intensity.

11. The wearable head device of claim 1 , wherein the content comprises a first display element and a second display element, and in accordance with the determination that the viewability is impaired and further in accordance with the determination that the maximum brightness of the see-through display is below the viewability threshold, the processor is further adapted to:

adjust one or more display attributes of the first display element, and

forgo adjusting one or more display attributes of the second display element.

12. The wearable head device of claim 11 , wherein the second display element comprises one or more of a logo and an icon.

13. The wearable head device of claim 1 , wherein the switching the configuration of the color palette comprises switching a display of white text on a black background to a display of black text on a gray background.

14. A method comprising:

presenting, a user of a wearable head device via a see-through display, content, wherein a surrounding environment is visible through the see-through display;

determining, via an eye-imaging camera, a gaze target, wherein the gaze target, a portion of the surrounding environment, and a portion of the content are visible via a region of the see-through display;

detecting, via a sensor of the wearable head device, a visual property of the surrounding environment;

comparing the detected visual property of the portion of the surrounding environment to a visual property of the portion of the content;

determining, based on the comparison, whether a viewability of the content is impaired;

determining whether a maximum brightness of the see-through display is below a viewability threshold;

in accordance with a determination that the viewability is impaired and further in accordance with a determination that the maximum brightness of the see-through display is below the viewability threshold:

switching a configuration of a color palette associated with the content; and

decreasing, based on a size of a pupil of a user, a brightness of the content, the size determined via the eye-imaging camera; and

in accordance with a determination that the viewability is not impaired or in accordance with a determination that the maximum brightness of the see-through display is not below the viewability threshold, forgoing:

switching the configuration of the color palette; and

decreasing the display brightness.

15. The method of claim 14 , further comprising detecting an environmental condition via a sensor, and

wherein the determining whether the viewability of the content is impaired is further based on the detected environmental condition.

16. The method of claim 14 , further comprising detecting a motion of the user via a sensor, and

wherein the determining whether the viewability of the content is impaired is further based on the detected motion.

17. The method of claim 14 , wherein the switching the configuration of the color palette comprises switching a display of white text on a black background to a display of black text on a gray background.

18. A non-transitory computer-readable storage medium storing instructions that, when executed, perform the following operations:

presenting, a user of a wearable head device via a see-through display, content, wherein a surrounding environment is visible through the see-through display;

determining, via an eye-imaging camera, a gaze target, wherein the gaze target, a portion of the surrounding environment, and a portion of the content are visible via a region of the see-through display;

detecting, via a sensor of the wearable head device, a visual property of the surrounding environment;

comparing the detected visual property of the portion of the surrounding environment to a visual property of the portion of the content;

determining, based on the comparison, whether a viewability of the content is impaired;

determining whether a maximum brightness of the see-through display is below a viewability threshold;

in accordance with a determination that the viewability is impaired and further in accordance with a determination that the maximum brightness of the see-through display is below the viewability threshold:

switching a configuration of a color palette associated with the content; and

decreasing, based on a size of a pupil of a user, a brightness of the content, the size determined via the eye-imaging camera; and

in accordance with a determination that the viewability is not impaired or in accordance with a determination that the maximum brightness of the see-through display is not below the viewability threshold, forgoing:

switching the configuration of the color palette; and

decreasing the display brightness.