Infrared weak target detecting method based on nonnegative constraint 2D variational mode decomposition

Abstract

An infrared weak target detecting method based on nonnegative constraint 2D variational mode decomposition settles the problems of high difficulty for accurately estimating frequency band in which an infrared weak target exists, easy detecting result interference by noise and background clutter, and low detecting efficiency in prior art. The method belongs to the field of infrared weak target detecting technology. The method comprises the steps of acquiring an infrared image, performing infrared image preprocessing by means of bandpass filter, constructing a target function through combining a two-dimensional variational mode decomposition method and the nonnegative constraint, inputting a preprocessing result into a target function, solving according to the target function, and outputting a decomposition result, wherein the result is K nonnegative narrowband subsignals; extracting a certain narrowband subsignal which corresponds with the infrared weak target in the result, and obtaining a target subsignal; performing adaptive threshold dividing on the extracted target subsignal, determining position and size of the infrared weak target, and outputting a detecting result. The infrared weak target detecting method is used for detecting the infrared weak target.

Description

technical field [0001] The invention discloses an infrared weak and small target detection method based on non-negative constraint 2D variational mode decomposition, which is used for infrared weak and small target detection, and belongs to the technical field of infrared weak and small target detection. Background technique [0002] Infrared imaging technology has been widely used in modern military, space-based detection, security monitoring and other fields. Among them, the infrared target detection and tracking system is its key technology and core module. Due to the long distance of infrared imaging in most applications, the target is often only a few pixels to dozens of pixels, which is a small target. In addition, due to the low imaging quality of the infrared detection system and the interference of the atmospheric system on the imaging, the signal-to-clutter ratio of the target is low, and it is a weak target. Infrared weak and small targets have the characteristi...

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Problems solved by technology

[0006] The present invention provides a non-negative constrained 2D variational mode decomposition based infrared weak target detection method for the above shortcomings, which solves the problem that the frequency band where the infrared weak target is located is difficult to be accurately estimated in the prior art, and the detection results are susceptible to noise and noise. Background clutter interference and low detection efficiency

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