Multi-camera autofocus synchronization

A system for synchronizing autofocus in a master camera and a slave camera, comprising:

• a non-transitory, machine readable storage medium storing a map that includes entries relating master camera lens positions of the master camera to corresponding slave camera lens positions of the slave camera;
• and
• a processor coupled to the storage medium, the processor configured with executable instructions to:
• focus the slave camera based on the map and a result of an autofocus operation by the master camera, while capturing each of a plurality of images;
• determine an initial slave camera lens position based on one or more of the plurality of entries in the map;
• determine a plurality of samples, each of the samples comprising a master camera lens position of the master camera and a slave camera lens position of the slave camera when capturing a corresponding one of the images;
• periodically perform an autofocus operation in the slave camera to determine an additional slave camera lens position for an additional image;
• and
• adaptively update the map, the updating comprising:
• adding a first entry to the map or updating the first entry in the map based on a first weight assigned to the initial slave camera lens position and a second weight assigned to the plurality of samples, and
• adding a second entry to the map or updating the second entry in the map based at least partially on the additional slave camera lens position.

A system for synchronizing autofocus in a master camera and a slave camera, comprising:

• means for determining an initial slave camera lens position for focusing a slave camera in response to an autofocus operation performed by the master camera;
• means for determining a plurality of samples, each of the plurality of samples comprising a master camera lens position of the master camera and a slave camera lens position of the slave camera when capturing a corresponding image;
• means for periodically initiating an autofocus operation in the slave camera to determine an additional slave camera lens position for capturing an additional image;
• means for adaptively updating a map, the means for adaptively updating comprising:
• means for adding a first entry to the map or updating the first entry in the map based on a first weight assigned to the initial slave camera lens position and a second weight assigned to the plurality of samples;
• and
• means for adding a second entry to the map or updating the second entry in the map based at least partially on the additional slave camera lens position;
• and
• means for determining a slave camera lens position based at least partially on the map.

A non-transitory, machine readable storage medium storing data and instructions, wherein the instructions are executable by a processor for synchronizing autofocus in a master camera and a slave camera, the medium comprising:

• a map comprising a plurality of entries, each of the plurality of entries relating a master camera lens positions of the master camera to a corresponding slave camera lens positions of the slave camera;
• and
• instructions to focus the slave camera based on the map and a result of an autofocus operation by the master camera, while capturing each of a plurality of images;
• instructions to determine an initial slave camera lens position based on one or more of the plurality of entries in the map;
• instructions to determine a plurality of samples, each of the plurality of samples comprising a master camera lens position of the master camera and a slave camera lens position of the slave camera when capturing a corresponding one of the images,
• instructions to periodically perform an autofocus operation in the slave camera to determine an additional slave camera lens position for an additional image;
• and
• instructions to adaptively update the map comprising:
• instructions to add a first entry to the map or updating the first entry in the map based on a first weight assigned to the initial slave camera lens position and a second weight assigned to the plurality of samples;
• and
• instructions to add a second entry to the map or updating the second entry in the map based at least partially on the additional slave camera lens position.