Attentional Local Contrast Networks for Infrared Small Target Detection
This work addresses the problem of detecting small infrared targets, which is crucial for surveillance and defense applications, by proposing an incremental improvement over existing methods.
This paper proposes a novel model-driven deep network for infrared small target detection, combining discriminative networks and conventional model-driven methods. The network incorporates a feature map cyclic shift scheme to modularize a local contrast measure and a bottom-up attentional modulation, resulting in a performance boost over competitors on the SIRST dataset.
To mitigate the issue of minimal intrinsic features for pure data-driven methods, in this paper, we propose a novel model-driven deep network for infrared small target detection, which combines discriminative networks and conventional model-driven methods to make use of both labeled data and the domain knowledge. By designing a feature map cyclic shift scheme, we modularize a conventional local contrast measure method as a depth-wise parameterless nonlinear feature refinement layer in an end-to-end network, which encodes relatively long-range contextual interactions with clear physical interpretability. To highlight and preserve the small target features, we also exploit a bottom-up attentional modulation integrating the smaller scale subtle details of low-level features into high-level features of deeper layers. We conduct detailed ablation studies with varying network depths to empirically verify the effectiveness and efficiency of the design of each component in our network architecture. We also compare the performance of our network against other model-driven methods and deep networks on the open SIRST dataset as well. The results suggest that our network yields a performance boost over its competitors. Our code, trained models, and results are available online.