Patent ID: 8552862

Claim:
A multi-level intrusion event detecting system, comprising: an area recognition module, configured for performing a geometric topology operation to recognize a plurality of areas in a ground plane, wherein the ground plane comprises a plurality of boundaries and a plurality of gates, and each of the areas is corresponding to at least one of the boundaries and at least one of the gates; and an area classification module, configured for defining a plurality of security levels and respectively classifying the areas recognized by the area recognition module as the security levels, wherein the geometric topology operation is a medial axis transformation, wherein the area recognition module generates a skeleton corresponding to the ground plane through the medial axis transformation, wherein the skeleton has a plurality of skeleton points, each of the skeleton points has a radius, and the radiuses are radiuses of maximum inscribed circles between the skeleton points and the boundaries in the ground plane, wherein the area recognition module recognizes the areas and the gates according to the skeleton points and the radiuses of the skeleton points.