DISTA-Net: Dynamic Closely-Spaced Infrared Small Target Unmixing

TL;DR

This paper introduces DISTA-Net, a novel deep learning model for unmixing closely-spaced infrared small targets, achieving superior sub-pixel detection accuracy and establishing an open-source ecosystem for further research.

Contribution

DISTA-Net is the first deep learning model specifically designed for unmixing closely-spaced infrared small targets, with adaptive dynamic reconstruction capabilities.

Findings

DISTA-Net outperforms existing methods in sub-pixel detection accuracy.

The open-source ecosystem includes a benchmark dataset, evaluation metric, and toolkit.

Code and dataset are publicly available for research use.

Abstract

Resolving closely-spaced small targets in dense clusters presents a significant challenge in infrared imaging, as the overlapping signals hinder precise determination of their quantity, sub-pixel positions, and radiation intensities. While deep learning has advanced the field of infrared small target detection, its application to closely-spaced infrared small targets has not yet been explored. This gap exists primarily due to the complexity of separating superimposed characteristics and the lack of an open-source infrastructure. In this work, we propose the Dynamic Iterative Shrinkage Thresholding Network (DISTA-Net), which reconceptualizes traditional sparse reconstruction within a dynamic framework. DISTA-Net adaptively generates convolution weights and thresholding parameters to tailor the reconstruction process in real time. To the best of our knowledge, DISTA-Net is the first deep learning model designed specifically for the unmixing of closely-spaced infrared small targets, achieving superior sub-pixel detection accuracy. Moreover, we have established the first open-source ecosystem to foster further research in this field. This ecosystem comprises three key components: (1) CSIST-100K, a publicly available benchmark dataset; (2) CSO-mAP, a custom evaluation metric for sub-pixel detection; and (3) GrokCSO, an open-source toolkit featuring DISTA-Net and other models. Our code and dataset are available at https://github.com/GrokCV/GrokCSO.