Abstract: A door status detecting method by using at least one QR code is executed by a door status detecting device including a camera unit and a processing unit. The camera unit is utilized to monitor a door having at least one QR code. The processing unit receives at least one monitoring frame of a monitoring video from the camera unit, and the processing unit further determines whether the door status of the door is at a closed status according to a position of the at least one QR code in the at least one monitoring frame. Since the processing unit utilizes the position of the at least one QR code to determine the door status, the processing unit does not need to include an Artificial intelligence (AI) model to detect the abnormal conditions. Therefore computation loads of the process unit can be reduced.

Abstract: A method of detecting whether a surveillance camera is abnormal or abnormal includes: obtaining a plurality of video frames from a video captured by the surveillance camera; sequentially comparing each of the plurality of video frames with a reference video frame; determining that the surveillance camera is abnormal when a sequence of video frame detection results indicates that not all of the plurality of video frames are normal video frames; issuing a maintenance notification of the surveillance camera when it is determined that the surveillance camera is abnormal with the particular one of the plurality of abnormal properties, thereby facilitating a maintenance procedure to be performed on the surveillance camera to remove the particular one of the plurality of abnormal properties.

Abstract: A method of detecting whether a surveillance camera is abnormal or abnormal includes: obtaining a plurality of video frames from a video captured by the surveillance camera; sequentially comparing each of the plurality of video frames with a reference video frame; determining that the surveillance camera is abnormal when a sequence of video frame detection results indicates that not all of the plurality of video frames are normal video frames; issuing a maintenance notification of the surveillance camera when it is determined that the surveillance camera is abnormal with the particular one of the plurality of abnormal properties, thereby facilitating a maintenance procedure to be performed on the surveillance camera to remove the particular one of the plurality of abnormal properties.