Development of Image Processing Meter Reading Technology

Abstract

Many infrastructure facilities are aging, and the number of such facilities will increase in the future. The maintenance and renewal of aging facilities entails a large expenditure. Therefore, it is necessary to automate maintenance and preventive maintenance based on the data collected by IoT technology. However, collecting data from analog and digital meters that do not have an external output is a problem. To solve this problem, we have developed a technology to read meters based on images acquired from a camera. Since there are various types of meters, we decided to separate the shape search and the reading process, and connect them with plug-ins. In addition, we have developed and evaluated a method for correcting the orthogonality of the search for circular and rectangular meters, and confirmed that it improves the reading accuracy.