A Vector Map Watermarking Method That Can Identify Modification Types

Abstract

The invention discloses a vector map watermark method capable of identifying modification types. The vector map watermark method includes the watermark embedding method and the watermark detection method. The watermark embedding method includes the following sub-steps: (1.1) identifying and grouping ground objects, (1.2) generating and embedding grouped weak watermarks, and (1.3) generating and embedding ground object weak watermarks. The watermark detection method includes the following sub-steps: (2.1) identifying and grouping the ground objects, (2.2) detecting the grouped weak watermarks, (2.3) detecting the ground object weak watermarks, and (4) carrying out positioning modification, and identifying the modification types. By means of the technical scheme, it is creatively provided that ground object modification is detected based on the weak watermarks, and the modification types are identified, and therefore the vector map watermark method has the advantages that the good fragility is achieved, the elaborate detection particle size is achieved, and the capacity of identifying the attack types is achieved.

Description

technical field [0001] The invention belongs to the technical field of information security and relates to a watermarking method, in particular to a vector map watermarking method which can identify modification types. Background technique [0002] The application of Geographic Information System (GIS) in daily life is becoming more and more popular and important. For example, applications such as route planning, vehicle navigation, cadastral management, and location-based services all require the support of GIS systems. Vector map is the basis of GIS application, its acquisition, construction and maintenance is a complex project with huge workload, which requires a lot of material and financial resources. In order to save costs, GIS application providers often need to lease geographic data to support services. During this process, application providers need to verify data integrity to ensure quality of service. [0003] Digital watermarking is an effective digital data i...

AI Technical Summary

Problems solved by technology

However, for vector maps, the current method can only locate the modification, that is, some features in the map have been added, deleted or modified, but cannot identify the type of modification