Automatic building identification method based on Fourier descriptor

Abstract

The invention discloses an automatic building identification method based on a Fourier descriptor. The method is used for automatically identifying illegal buildings of illegal land use. The method comprises the following steps: an original building RGB color image is converted into a gray edge image through filtering, enhancement and edge detection; all the contour of the gray edge image is extracted according to a Fourier descriptor method; the contour points are written in the plural form, discrete Fourier transform is carried out, and then modulus operation is performed on the value after transformation to obtain a normalized Fourier descriptor; the extracted contour data is simplified according to a DP algorithm; a building shape standard template library is established according to the simplified building contour; the Euclidean distance with the standard template library is calculated, and the Euclidean distance is used to represent the similarity of two Fourier descriptors; and finally, whether the extracted contour is a typical building shape feature is judged. Therefore, the purpose of automatically identifying an illegal building in a video image is achieved.

Description

technical field [0001] The invention relates to the fields of image processing and pattern recognition, in particular to a building automatic recognition method based on Fourier descriptors. Background technique [0002] At present, in the process of urbanization in my country, there are prominent problems in the use of new construction land in villages and towns, such as chaotic layout, disordered expansion, serious waste, and many forms of violations of laws and regulations, which are widely distributed. There are three main forms of illegal land use: (1) evasion of agricultural land conversion and expropriation approval; (2) breaking through the actual scope of the development zone, and setting up various new development zones and industrial concentration areas in various names; (3) unauthorized advance Land requisition, land supply, construction, first-occupation, first-occupation, while reporting and occupying. A series of technical means such as the 12336 reporting te...

AI Technical Summary

Problems solved by technology

The 12336 reporting hotline has the disadvantages that all clues cannot be verified on the spot and the direction of clues is not wide enough.

There are also some problems in law enforcement inspection of satellite land: (1) high cost, occupying precious satellite resources; (2) single imaging angle; (3) susceptible to interference from meteorological factors; (4) long law enforcement cycle , unable to monitor efficiently in real time

This mode of work greatly increases the workload of the staff, and also reduces the timeliness of dealing with illegal land use

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