I. Introduction
In the era of the Internet of Multimedia Things (IoMT) and big data, we encounter rich multimedia information every day. Multimedia information has the characteristics of a large amount of data and intuitive information, which also means that wireless multimedia sensor networks (WMSNs) have higher requirements for network bandwidth, security, energy consumption, processing capacity of nodes, and transmission quality. Therefore, a scheme on data acquisition of low-cost sampling and privacy protection for multimedia big data plays a vital role.