Remote-sensing image change detecting method based on land utilization database

Abstract

The invention belongs to the field of remote-sensing image change detection and provides a remote-sensing image change detecting method based on a land utilization database in order to adapt to the requirement of national land change survey and quickly extract newly added construction land through indoor work. The technical scheme is that the land utilization database is utilized, the boundary of the land utilization database serves as an object cut-oriented cutting result, and the cutting precision is improved; a characteristic value of land type pattern spot data serves as a sample statistical empirical value of various types of land features, and a threshold value is provided for a characteristic image difference value; a detecting method based on a pixel and oriented to a specific target is combined to provide a method for extracting a green plant covered region from a real colored image, the land type attribute is helped to be judged, and the precision of change detection is improved; and according to the energy distribution characteristic of an image in a frequency domain, a method for self-adaptively and precisely extracting image detail characteristics is provided, and the construction land is quickly extracted according to the detail characteristics.

Description

technical field [0001] The invention belongs to the field of remote sensing image change detection, in particular to a remote sensing image change detection method based on a land use database. Background technique [0002] According to the provisions of the State's "Land Survey Management", the state conducts land change surveys every year. Land change survey is an important survey of national conditions and national strength, an effective basis for implementing planning, management, protection and rational use of land resources, and a basis for formulating national economic and social development plans and related special plans. At present, the mainstream method of land change investigation is still to manually compare the changed parts of the two images in the office and then outline them, and finally make up the drawing in the field survey. In view of the huge workload and long working cycle of manual change detection, it is very urgent to apply automatic change detecti...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect that the workload of manual detection of change areas is large in the land change investigation of the land department, the purpose of the present invention is to provide a fast and accurate change detection method based on the land use database to improve the change detection efficiency of land survey changes

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