1. A method for the detection of an object moving in the monitored region ( 15 ) of a camera ( 13 ), wherein an actual image of the monitored region is recorded by the camera ( 13 ); at least one actual measured value is derived from the actually recorded image which provides information on differences between at least two different image regions and which is invariant with respect to image displacements, image rotations and/or image size changes; this actual measured value is compared with a corresponding reference value derived from a stored reference image recorded by the camera ( 13 ); and an object recognition reaction is triggered on a pre-set deviation of the actual measured value from the reference value.