公开(公告)号：US10194072B2

公开(公告)日：2019-01-29

申请号：US14733625

申请日：2015-06-08

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Irina Kleyman ,  Tyrone D. Bekiares ,  Hinrich A. Schmidt

IPC: H04N5/232 ,  H04N1/00 ,  H04N5/77 ,  H04N9/82 ,  H04N17/00 ,  H04N7/18 ,  H04N101/00

Abstract: A communication system provides for automated detection, and resolution, of focus hunt. A server determines whether a predetermined number of blur metric transition (BMT) cycles, associated with a video stream, have occurred within a predetermined period of time or number of frames. In response to determining that the predetermined number of BMT cycles have occurred, the server determines that focus hunt has occurred. A BMT occurs when first and second blur metrics, determined for first and second video frames, transition from being greater than a blur metric threshold to being less than the threshold, or vice versa. In turn, a BMT cycle occurs when a BMT, of a first BMT and a second BMT, comprises a transition of blur metrics from less than the threshold to greater than the threshold and the other BMT comprises a transition of blur metrics from greater than the threshold to less than the threshold.