Method to monitor an area

摘要

A method to monitor an area (18) and a monitoring device (10) to implement the method are presented. In the method, using a camera (11) at least one image of the area (18) is recorded and compared with a reference image assigned to the area (18).

主权项

1. A method to monitor an area (18) wherein a camera (11) captures at least one image of the area (18), and the captured at least one image of the area (18) is compared with a reference image assigned to the area (18), wherein the comparison is carried out on the basis of spatial gradients that are identified in the captured at least one image of the area (18), wherein the method further comprises determining a normalized cross-correlation gradient between spatial gradients in the reference image and the spatial gradients in the captured at least one image of the area (18), and wherein the comparison includes detecting edges of objects based on the spatial gradients in the captured at least one image of the area (18).