MONITORING SYSTEM AND CAMERA DEVICE

摘要

The present invention discloses a monitoring system for detecting video abnormality in a number of camera devices quickly and with a low throughput. In this system, each individual camera device divides the image data acquired by an image sensor unit into a plurality of areas, and detects video abnormality from an average luminance signal value in each area or from a change thereof. The camera device that has detected video abnormality transmits video abnormality detection information to a server. In the plurality of areas, it is possible to use different detection algorithms such as a first algorithm in which it is determined that an abnormality has occurred when, for example, there is no change in the average luminance value, a second algorithm in which it is determined that an abnormality has occurred when there is a change in the average luminance value, and a third algorithm for observing a change in the video captured while a change is made, for example, to an aperture, exposure time, or the like.