Abstract
In order to develop intruder detection system or provide user-focused services to walking persons, we proposed the method to estimate their destination from trajectory of walking persons with fixed camera using Hidden Marcov Model. To evaluate availability of our method, we calculated discrimination ratio for elapsed time, and confirmed it reaches to 80% after 2 seconds of observation. However, it is not enough to evaluate availability, because the ratio of approach to destination is not reflected in this index. In this paper, we introduced the ratio of approach to destination as another index of availability, and present the calculation result of both of them. Additionally, we discuss about how to use them properly depending on the situation.