Echo-based focus
AssigneeCisco Technology, Inc.
InventorsErik Hellerud, Asbjorn Therkelsen
Life of this patent
Estimating the term…
Abstract
According to one or more embodiments of the disclosure, a device may make, based on an echo reflected from a subject of an image capture, a determination that a distance between a camera and the subject of the image capture has stabilized following a change in the distance. The device may determine whether to initiate a refocus of the camera on the subject based on the distance between the camera and the subject of the image capture following the change. The device may identify a focal search range of the refocus based on the distance between the camera and the subject of the image capture following the change. The device may cause the refocus on the subject using the focal search range.
Claims20
A method comprising:
- making, by a device and based on an echo comprising a portion of an ultrasonic audio signal reflected from a subject of an image capture, a determination that a distance between a camera and the subject of the image capture has stabilized following a change in the distance, wherein the echo is of sound emission of the device;
- determining, by the device, whether to initiate a refocus of the camera on the subject based on the distance between the camera and the subject of the image capture following the change;
- identifying, by the device and based on the distance between the camera and the subject of the image capture following the change, a focal search range for configuring a focus search operation of the refocus;
- and
- causing, by the device, the refocus on the subject using the focal search range.
An apparatus, comprising:
- one or more network interfaces;
- a processor coupled to the one or more network interfaces and configured to execute one or more processes;
- and
- a memory configured to store a process that is executable by the processor, the process when executed configured to:
- make, based on an echo comprising a portion of an ultrasonic audio signal reflected from a subject of an image capture, a determination that a distance between a camera and the subject of the image capture has stabilized following a change in the distance, wherein the echo is of sound emission of the apparatus;
- determine whether to initiate a refocus of the camera on the subject based on the distance between the camera and the subject of the image capture following the change;
- identify, based on the distance between the camera and the subject of the image capture following the change, a focal search range for configuring a focus search operation of the refocus;
- and
- cause the refocus on the subject using the focal search range.
A tangible, non-transitory, computer-readable medium storing program instructions that cause a device to execute a process comprising:
- making, by the device and based on an echo comprising a portion of an ultrasonic audio signal reflected from a subject of an image capture, a determination that a distance between a camera and the subject of the image capture has stabilized following a change in the distance, wherein the echo is of sound emission of the device;
- determining, by the device, whether to initiate a refocus of the camera on the subject based on the distance between the camera and the subject of the image capture following the change;
- identifying, by the device and based on the distance between the camera and the subject of the image capture following the change, a focal search range for configuring a focus search operation of the refocus;
- and
- causing, by the device, the refocus on the subject using the focal search range.
Dependencies are inferred from the claim text.