A detection method for infrared small targets on sea surface

Abstract

The invention discloses a sea surface infrared small target detection method. The steps include: (1) constructing a new image matrix from non-local blocks: decomposing the original image matrix into overlapping sub-blocks, and then expanding the sub-blocks into column vectors, Then combine the column vectors to obtain a new image matrix; (2) Sparse and low-rank matrix decomposition: decompose the newly constructed image matrix into sparse small target components, low-rank background image components and noise components; (3) Establish a convex Optimization model: Construct a convex optimization constrained energy functional about small target images and background images; (4) Efficient optimization solution: Use the alternating direction multiplier method of efficient parameter adaptive updating to solve the constructed convex optimization constrained energy functional; iterative acquisition Small target images of interest; the detection method provided by the present invention has low computational cost, good parameter adaptability, high detection efficiency, and the ability to resist background noise and clutter interference, and can be applied to infrared small target detection in complex sea surface backgrounds.

Description

technical field [0001] The invention belongs to the technical field of target detection, and more specifically relates to a small infrared target detection method on the sea surface based on non-local block matrix sparseness and low-rank decomposition and fast optimization solution in the case of strong background noise and clutter. Background technique [0002] Infrared small target detection technology is the key technology in infrared search and track system. The performance of infrared search and track system depends on the detection accuracy of small infrared targets. The detection of small infrared targets on the sea surface is susceptible to interference from complex background noise and clutter. Infrared images show low signal-to-noise ratio and low contrast. Coupled with the imaging of long-distance targets, the target generally occupies a small proportion of pixels; in addition, small infrared targets have no obvious Texture and shape structure features, the perfo...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a sea surface infrared small target detection method, the purpose of which is to restore sparse small infrared targets and low-rank sea surface background images from the newly constructed data matrix, and solve the problem of Effective and stable detection of small infrared targets on the sea surface under the background of strong noise and sea clutter

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