Patent ID: 8908046

Claim:
A method for determining the reliability of a fault detection of a camera in a camera system, the camera system being arranged to perform a fault detection test to detect a fault of the camera based on data acquired by the camera, the method comprising: the camera system accessing criteria relating to environmental conditions external to the camera and affecting the reliability of the fault detection test; the camera system receiving data relating to the environmental conditions at a time point; the camera system checking whether the data relating to the environmental conditions complies with the criteria, thereby determining whether the fault detection test gives a reliable result at that time point; and wherein the time point is a current time point, and the camera system performs the fault detection test only if the data regarding the environmental conditions complies with the criteria, wherein the data relating to the environmental conditions at a time point comprises data from a weather service, a pressure sensor, a motion sensor, a thermometer, a hygrometer, a photometer, or an image sensor.