公开(公告)号：WO2022061352A1

公开(公告)日：2022-03-24

申请号：PCT/US2021/071481

申请日：2021-09-16

Applicant: OBJECTVIDEO LABS, LLC

Inventor： QIAN, Gang ,  BEACH, Allison ,  TAHERI, Sima ,  BONDUGULA, Sravanthi ,  LEE, Sung Chun ,  RAMANATHAN, Narayanan

IPC: G08B13/196 ,  G06N5/04 ,  H04N7/00 ,  G06K9/00

Abstract: Methods and systems, including computer programs encoded on a storage medium, are described for implementing item monitoring using a doorbell camera. A system generates an input video stream that has image frames corresponding to detection of activity at a property. Timing information is generated for the video stream and includes a timestamp for each image frame of the stream. Using the timing information, the system processes a pre-event image frame that precedes detection of the activity and a post-event image frame that coincides with detection of the activity. An image score is computed with respect to placement of a candidate item at the property in response to processing the pre-event and post-event image frames. The image score is used to determine that a first item was delivered to the property or that a second item was removed after being delivered to the property.