A Method for Building Automatic Recognition Based on Fourier Descriptor

Abstract

The invention discloses an automatic identification method for buildings based on Fourier descriptors, which is used for automatic identification of illegal buildings used in violation of land laws and regulations. The method comprises the steps of: first filtering, enhancing, and Processing such as edge detection converts it into a gray-scale edge image; then extracts all the contours of the gray-scale edge image according to the Fourier descriptor method; then writes the contour points in the form of complex numbers and performs discrete Fourier transform on them , and then modulo the transformed value to obtain a normalized Fourier descriptor; and simplify the extracted contour data according to the DP algorithm; establish a building shape standard template library according to the simplified building contour; calculate and The Euclidean distance of the standard template library uses the Euclidean distance to represent the similarity between two Fourier descriptors, and finally judges whether the extracted outline is a typical building shape feature, so as to automatically identify illegal building targets in video images .

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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