We propose a remote monitoring system using PLC (Power Line Communication) networks for sending and receiving data. The PLC is based on power lines. Since power lines are now available almost anywhere, it means that a PLC network can easily be built anywhere. Therefore, it is very easy hence useful to build a remote security monitoring system using the PLC networks.
However, the transmission speed of PLC is very slow at present due to the limit of the permitted in Japan, and also because the transmission is often interrupted by noise produced by household appliances. Thus a large data like a raw image cannot be transmitted in real time.
To overcome this speed problem, in the proposed remote monitoring system, we first analyze an input image to detect a possible invader and then to determine its size and location in the observed scene. It is the resultant information that is transmitted via the PLC networks. In the reception side, the location and size of the invader is reproduced in a 3D space by the received information. In this way, we can decrease the amount of transmission data to materialize a remote monitoring system using such a slow PLC networks.
More precisely, we analyze the input image by motion detection. Location detection is performed by motion detection using two cameras. Size calculation is also performed. Experimental results show that the proposed system seems promising for remote monitoring.