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Wavelet-Based Contourlet Transform and Kurtosis Map for Infrared Small Target Detection in Complex Background.

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  • 1School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.

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Summary

This study introduces an improved infrared small target detection method using Wavelet-based Contourlet Transform (WBCT) and a kurtosis model. The new approach effectively reduces false alarms in complex backgrounds.

Keywords:
Wavelet-based Contourlet transform (WBCT)complex backgroundinfrared small target detectionkurtosis map

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Area of Science:

  • Signal Processing
  • Computer Vision
  • Infrared Imaging

Background:

  • Wavelet-based Contourlet Transform (WBCT) is a Multi-scale Geometric Analysis (MGA) method effective for background suppression and edge enhancement.
  • WBCT faces challenges with high false alarm rates in small target detection within complex backgrounds.

Purpose of the Study:

  • To develop an efficient and robust method for infrared small target detection in complex backgrounds.
  • To improve upon existing WBCT limitations by integrating a kurtosis model.

Main Methods:

  • Introduced WBCT as a preprocessing step with an adaptive threshold strategy to suppress background clutter.
  • Utilized a local kurtosis operator to generate a saliency map, identifying potential target areas.
  • Employed a sliding window with mean and variance calculations, followed by adaptive threshold segmentation to isolate small targets.

Main Results:

  • The proposed method demonstrates superior performance compared to contrast methods.
  • Achieved significant improvements in detection rate and reduction in false alarm rate.
  • Exhibited enhanced performance on the Receiver Operating Characteristic (ROC) curve, particularly in complex background scenarios.

Conclusions:

  • The combined WBCT and kurtosis model offers an effective solution for infrared small target detection.
  • The adaptive thresholding strategies enhance robustness against background noise and clutter.
  • The method proves particularly advantageous for detecting small targets in challenging, complex infrared environments.