MONITORING DEVICE, MONITORING SYSTEM, AND MONITORING METHOD

A monitoring device includes a memory; and a processor configured to execute a process including acquiring image data indicating a change in intensity of incident light from a sensor array, determining a first region to be monitored and a second region not to be monitored in a field of view of the sensor array, and outputting a monitoring result of a moving object based on the image data acquired by the sensor array in the first region.