Motion detection method and device using the same
AssigneeSercomm Corporation
InventorShiou-Hua Hu
Life of this patent
Estimating the term…
Abstract
A motion detection method is provided. The method includes steps of: recording an input video having a plurality of windows of interest (WOIs), extracting a reference frame from the input video in every reference updating cycle, extracting a target frame from the input video and determining whether an event occurs in each of the WOIs by comparing the target frame with the reference frame in every checking cycle, and comparing the number of WOIs in which the event occurs in every observation cycle with a threshold to determine whether the input video contains a motion during the observation cycle.
Claims20
A motion detection method, comprising:
- recording an input video having a plurality of image frames, with each image frame having a plurality of windows of interest (WOIs);
- extracting a reference frame from the input video in every reference updating cycle;
- extracting a target frame from the input video and determining whether an event occurs in each of the WOIs by comparing the target frame with the reference frame in every checking cycle;
- and
- comparing the number of WOIs in which the event occurs in every observation cycle with a threshold to determine whether the input video contains a motion during the observation cycle;
- wherein the observation cycle is greater than the checking cycle, and the checking cycle is greater than or equal to the reference updating cycle.
A motion detection device, comprising:
- a video recording circuit for recording an input video having a plurality of image frames, with each image frame having a plurality of windows of interest (WOIs);
- a storage circuit for storing the recorded input video;
- and
- a processing circuit for extracting a reference frame from the input video in every reference updating cycle, extracting a target frame from the input video and determining whether an event occurs in each of the WOIs by comparing the target frame with the reference frame in every checking cycle, and comparing the number of WOIs in which the event occurs in every observation cycle with a threshold to determine whether the input video contains a motion during the observation cycle,
- wherein the observation cycle is greater than the checking cycle, and the checking cycle is greater than or equal to the reference updating cycle.
Dependencies are inferred from the claim text.