A False Alarm Suppression Method for Small Infrared Target Detection in Complex Background

Abstract

The invention provides a method for suppressing false alarms of small and weak infrared targets under complex backgrounds, which mainly solves the problems of high detection false alarm rate and low detection robustness in existing weak and small target detection technologies. The method includes the following steps: 1) Firstly, image preprocessing is performed on the original infrared image to obtain a background-suppressed image; 2) The target point trace is remapped according to the vector position information of the candidate target point trace, and the candidate target point is generated by using a limited neighborhood maximum search method 3) Calculate the relevant diamond-shaped neighborhood, circular neighborhood feature parameters and neighborhood signal-to-noise ratio parameters of candidate target trace windows respectively; 4) Neighborhood feature parameters and neighborhood feature parameters of all candidate target trace windows The signal-to-noise ratio parameter is used for adaptive threshold judgment to realize the extraction of weak and small target traces after false alarm suppression. The invention can be used in the fields of target search, remote monitoring, reconnaissance and alarm, etc., and has excellent detection performance of small and weak infrared targets.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method for suppressing false alarms of small and weak infrared targets under complex backgrounds. Background technique [0002] Infrared weak and small target detection is an important technology in the long-range photoelectric search system, because the infrared sensor is easily affected by the external environment, weather, sensor noise, etc. during the imaging process, and when the infrared image is acquired at a long distance, the background is relatively complicated, especially In scenarios such as cloud and rain clutter, ground clutter, etc., how to effectively try to detect real infrared weak targets becomes the key to long-range photoelectric systems. The characteristic performance of infrared weak and small targets is that the pixel size is less than 3×3, the texture feature information is missing, and the image signal-to-noise ratio is low. The small ...

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the present invention proposes a false alarm detection method for infrared weak and small targets under complex backgrounds in order to solve the problems of high false alarm rate and poor robustness in the existing photoelectric search system. Suppression method, which has low computational complexity and is easy to implement in engineering

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