A spectral correlation super-resolution method for broadband electromagnetic distribution detection

Abstract

The invention relates to a frequency spectrum correlation super-resolution method used for broadband electromagnetic distribution detection. Recovery of images formed by 1-6GHz broadband radiation resources can be achieved. The method comprises steps of firstly establishing a model in simulation software according to a quality reduction image of an unknown radiation source, acquiring different frequencies of point expansion functions; then, carrying out spatial two-dimensional Fourier transform on the different frequencies of point expansion functions, recording cut-off frequency width in the space and drawing a corresponding frequency-width curve graph; carrying out two-dimensional Fourier transform on an acquired wideband electromagnetic distribution image, solving the cut-off frequency width in the space and determining the highest frequency on the curve obtained through the simulation; and using the point expansion function corresponding to the highest frequency component to carry out processing on the image, and using the L_R iteration method in the narrow band super-resolution algorithm to carry out image recovery on the quality reduction image. According to the invention, a condition that the traditional narrow band super-solution algorithm is not compatible to an electromagnetic distribution detection system is overcome; the highest frequency in the wideband radiation source is identified; and resolution of the image is effectively improved.

Description

technical field [0001] The present invention involves a broadband hyperfraction method for the broadband electromagnetic distribution detection system, which involves the field of broadband electromagnetic detection and the field of image processing. Background technique [0002] At present, the detection method of electromagnetic distribution mainly adopts the form of antenna and receiver for point-by-point manual detection. This method has many disadvantages, such as slow detection speed, and the antenna will interfere with the original field distribution. The use of parabolic reflexes to detect electromagnetic distribution can achieve fast and non -interference. Affected by the size of the antenna, the diffraction of the broadband electromagnetic distribution detection system is severely limited. How to improve its resolution so that the electromagnetic distribution can be clearly distinguished has become a new difficulty. [0003] Due to the limitation of the diffractio...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is to overcome the deficiencies of the prior art, and provide a method for solving the image blur problem in the broadband electromagnetic distribution detection system effectively for the existing narrowband super-resolution algorithm, based on the relationship between the frequency components of the broadband radiation source Existing relevance, using high-frequency components to restore images, and locating low-frequency components, so as to restore blurred images formed by broadband radiation sources, and propose a spectrum correlation super-resolution algorithm for broadband electromagnetic distribution detection

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