Method and apparatus for camera autofocus based on Wi-Fi ranging technique

1. A method of capturing an image using automatic focus, the method comprising:

receiving, by a camera device, a transmission from a wireless device over a wireless network, the transmission including time information indicating when the transmission was sent;

determining a distance between the camera device and the wireless device based on comparing the time information included in the received transmission to a time when the transmission was received at the camera device;

adjusting a focus of a camera of the camera device based on the determined distance; and

capturing an image using the adjusted focus of the camera.

2. The method of claim 1 , wherein determining the distance between the camera device and the wireless device further comprises using a global positioning system location of the camera and a global positioning system location of the wireless device.

3. The method of claim 2 , further comprising receiving by the camera a global positioning system location of the wireless device.

4. The method of claim 3 , wherein the wireless network is one of an IEEE 802.11-based network, a cellular network, or a Bluetooth network.

5. The method of claim 2 , further comprising requesting, using the camera device, a global positioning system location from the wireless device over the wireless network.

6. The method of claim 1 , wherein the wireless network comprises a network operating under one or more IEEE 802.11 standard.

7. The method of claim 1 , wherein the wireless network comprises a peer-to-peer wireless network, and where communicating with a wireless network comprises communicating with the wireless device via the peer-to-peer wireless network.

8. The method of claim 1 , wherein the wireless device comprises a mobile device worn by a person that is a subject of the image.

9. The method of claim 1 , further comprising:

determining a direction from the camera to the wireless device, using the wireless network; and

determining if the wireless device is within a field of view of the camera, based at least on the determined direction.

10. The method of claim 1 , wherein determining a distance between the camera device and the wireless device comprises determining a distance between the camera device and the wireless device to a precision of about one meter.

11. The method of claim 1 , wherein capturing an image using the adjusted focus of the camera comprises capturing a video, comprising a plurality of images, using the adjusted focus of the camera.

12. The method of claim 1 , wherein the time information comprises a time stamp.

13. An apparatus for capturing an image using an automatic focus, comprising:

a camera configured to capture one or more images; and

a processing system configured to:

communicate with a wireless network to receive a transmission from a wireless device, the transmission including time information indicating when the transmission was sent;

determine a distance between the camera and the wireless device by comparing the time information to a time when the transmission was received at the processing system; and

adjust a focus of the camera based on the determined distance.

14. The apparatus of claim 13 , wherein the wireless network is one of an IEEE 802.11-based network, a cellular network, or a Bluetooth network.

15. The apparatus of claim 13 , wherein the wireless network comprises a peer-to-peer wireless communication network, and wherein the processing system is further configured to communicate with the wireless device via the peer-to-peer wireless network.

16. The apparatus of claim 13 , wherein the wireless device comprises a mobile device worn by a person that is a subject of the image.

17. The apparatus of claim 13 , wherein the processing system is further configured to request a global positioning system location from the wireless device over the wireless network.

18. The apparatus of claim 13 , wherein the processing system is further configured to:

determine a direction from the camera to the wireless device, using the wireless network; and

determine if the wireless device is within a field of view of the camera, based at least on the determined direction.

19. The apparatus of claim 13 , wherein the processing system is further configured to determine the distance between the camera and the wireless device to a precision of about one meter.

20. The apparatus of claim 13 , wherein the camera is further configured to image capture video using the adjusted focus.

21. An apparatus, comprising:

means for capturing an image;

means for communicating with a wireless device via a wireless network to receive a transmission from the wireless device at the means for communicating, the transmission including time information indicating when the transmission was sent;

means for determining a distance between the image capturing means and the wireless device by comparing the time information to a time the transmission was received at the communication means; and

means for adjusting focus of the image capturing means based at least in part on the determined distance.

22. The apparatus of claim 21 , wherein the wireless network is one of an IEEE 802.11-based network, a cellular network, or a Bluetooth network.

23. The apparatus of claim 21 , wherein the wireless network comprises a peer-to-peer wireless network.

24. The apparatus of claim 21 , wherein the means for determining a distance determines the distance between the image capturing means and the wireless device based in part on a received global positioning system location.

25. The apparatus of claim 21 , further comprising:

means for determining a direction from the image capturing means to the wireless device, using the wireless network; and

means for determining if the wireless device is within a field of view of the image capturing means, based at least on the determined direction.

26. The apparatus of claim 24 , wherein the means for determining a distance is further configured to determine a distance between, the image capturing means and the wireless device to a precision of about 1 meter.

27. The apparatus of claim 21 , wherein the image capturing means comprises a camera, and wherein the communicating means comprises a transceiver.

28. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:

receive, by a camera device, a transmission from a wireless device over a wireless network, the transmission including time information indicating when the transmission was sent;

determine a distance between the camera device and the wireless device by comparing the time information to a time when the transmission was received at the camera device;

adjust a focus of a camera of the camera device based upon the determined distance; and

capture an image using the adjusted focus of the camera.

29. The non-transitory computer-readable medium of claim 28 , further comprising code that when executed, causes an apparatus to determine the distance between the camera device and the wireless device based on, at least in part, a global positioning system location of the camera and a global positioning system location of the wireless device.

30. The non-transitory computer-readable medium of claim 28 , further comprising code that, when executed, causes an apparatus to:

determine a direction from the camera to the wireless device, using the wireless network; and

determine if the wireless device is within a field of view of the camera, based at least on the determined direction.