Privacy-protected video surveillance in crowded environments using robust watermarking

Video surveillance is being used in many fields, specifically, for detecting suspicious activity in public places, such as shopping malls. Due to an increase in the number of installed surveillance cameras, personal privacy infringement is likely to increase. Therefore, we had proposed a video surveillance system for protecting an individuals privacy. However, there had been little study done related to its use in the real environment, i.e., a crowded environment. In this study, we propose a scheme for protecting the privacy in crowded environments using dithering technique and robust watermarking.