Light field processor system
A wearable ophthalmic device is disclosed. The device may include an outward facing head-mounted light field camera to receive light from a user's surroundings and to generate numerical light field image data. The device may also include a light field processor to generate modified numerical light field image data by computationally introducing an amount of optical power to the numerical light field image data based on a viewing distance from the user to an object. The device may also include a head-mounted light field display to generate a physical light field corresponding to the modified numerical light field image data.
1. A wearable ophthalmic device, comprising:
an outward facing head-mounted light field camera configured to receive light from a user's surroundings and to generate numerical light field image data;
a light field processor configured to generate modified numerical light field image data by computationally introducing an amount of optical power to the numerical light field image data based on a viewing distance from the user to an object; and
a head-mounted light field display configured to generate a physical light field corresponding to the modified numerical light field image data.
2. The device of claim 1 , further comprising a head-mounted accelerometer sensor to determine the user's head orientation, wherein the viewing distance is estimated based on the user's head orientation.
3. The device of claim 1 , further comprising one or more head-mounted eye tracking cameras to determine the user's gaze direction, wherein the viewing distance is estimated based on the user's gaze direction.
4. The device of claim 1 , further comprising one or more head-mounted eye tracking cameras to determine a convergence point of the user's gaze, wherein the viewing distance is estimated based on the convergence point of the user's gaze.
5. The device of claim 1 , wherein the amount of optical power is based on an optical prescription for the user for correction of presbyopia.
6. The device of claim 5 , wherein the wearable ophthalmic device is configured to measure the optical prescription.
7. The device of claim 1 , wherein the light field camera comprises an integral imaging camera.
8. The device of claim 1 , wherein the light field display comprises an integral imaging display.
9. The device of claim 1 , further comprising a manual control to specify the amount of optical power to introduce to the numerical light field image data.
10. The device of claim 1 , wherein the light field processor is configured to introduce the amount of optical power to the entire field of view of the numerical light field image data.
11. The device of claim 1 , wherein the light field processor is configured to introduce the amount of optical power only to a lower portion of the field of view of the numerical light field image data.
12. A method for using a wearable ophthalmic device, the method comprising:
receiving light from a user's surroundings and generating numerical light field image data using an outward facing head-mounted light field camera;
generating modified numerical light field image data by computationally introducing an amount of optical power to the numerical light field image data using a light field processor, the amount of introduced optical power being based on a viewing distance from the user to an object; and
generating a physical light field corresponding to the modified numerical light field image data using a head-mounted light field display.
13. The method of claim 12 , further comprising determining the user's head orientation using a head-mounted accelerometer sensor, and estimating the viewing distance based on the user's head orientation.
14. The method of claim 12 , further comprising determining the user's gaze direction using one or more head-mounted eye tracking cameras, and estimating the viewing distance based on the user's gaze direction.
15. The method of claim 12 , further comprising determining a convergence point of the user's gaze using one or more head-mounted eye tracking cameras, and estimating the viewing distance based on the convergence point of the user's gaze.
16. The method of claim 12 , wherein the amount of optical power is based on an optical prescription for the user for correction of presbyopia.
17. The method of claim 16 , further comprising measuring the optical prescription using the wearable ophthalmic device.
18. The method of claim 12 , wherein the light field camera comprises an integral imaging camera.
19. The method of claim 12 , wherein the light field display comprises an integral imaging display.
20. The method of claim 12 , further comprising receiving the amount of optical power to introduce to the numerical light field image data from a manual control.
21. The method of claim 12 , further comprising introducing the amount of optical power to the entire field of view of the numerical light field image data.
22. The method of claim 12 , further comprising introducing the amount of optical power only to a lower portion of the field of view of the numerical light field image data.