Vehicle moving distance detecting method, vehicle moving distance detecting device, current vehicle position detecting method, and current vehicle position detecting device

摘要

In a case that vehicle speed obtained based upon pulse signals output from a vehicle speed sensor is equal to or greater than a predetermined vehicle speed, moving distance is obtained based upon the pulse signals received from the vehicle speed sensor. On the other hand, in a case that the vehicle speed is less than the aforementioned reference vehicle speed, patterns of the image data sets, which have been captured by a rear camera at different points in time, are acquired, and the moving distance is obtained based upon the patterns.