Improvement of privacy protection surveillance camera system and its applications

Kobayashi et al. proposed a privacy protection surveillance camera system (PPSCS) [4]. PPSCS can maintain the secrecy of the facial image of subject persons (SPs) captured by a surveillance camera, according to their intentions, by using techniques such as mosaicking. In PPSCS, the system cannot remove the mosaicking unless the SP commits a crime. In this study, we propose new applications for the PPSCS and demonstrate its validity. Moreover, we employ necessary improvements to the PPSCS to allow these proposed applications to be implemented, evaluate the risks incurred by the new applications, and demonstrate how the improved PPSCS includes risk countermeasures.