VIDEO MONITORING DEVICE AND VIDEO MONITORING METHOD

原文（中国語）

A video monitoring device that monitors video data received from a video display device that receives a video signal from a camera and displays a video, the video monitoring device including: a video extractor that extracts, from the video data, color information of each pixel in an image indicated by the video data; a specific color difference operator that computes, for each pixel, difference information between a color indicated by the color information and a predetermined specific color; a histogram calculator that calculates a histogram by classifying the difference information computed for each pixel, the histogram having, for each difference interval, a frequency indicating the number of pixels belonging to the difference interval; and an anomaly detector that generates and outputs a signal indicating that the video data is anomalous, when a frequency of belonging to a predetermined difference interval in the histogram is at least a first threshold.