Crowdedness Quantification Measures for Evaluation of Hazard Avoidance Smartphone Apps for Visually Impaired

Abstract

The authors are conducting research on the use of smartphones to support the safe walking of the visually impaired persons. Currently, we are developing an application that specializes in functions to prevent accidents involving falls on the station platforms. To evaluate the effectiveness of this application, it is necessary to confirm that it works correctly in crowded places, so the degree of such crowdedness must also be quantitatively determined to quantitatively demonstrate its usefulness. This paper discusses quantitative measures of the crowdedness using a system that measures the location of people, based on experiment data.