Object recognition in atmospheric turbulence scenes

The influence of atmospheric turbulence on acquired surveillance imagery makes image interpretation and scene analysis extremely difficult. It also reduces the effectiveness of conventional approaches for classifying, and tracking targets in the scene. Whilst deep-learning based object detection is highly successful in normal conditions, these methods cannot directly be applied to the atmospheric turbulence sequences. This paper hence proposes a novel framework learning the distorted features to detect and classify object types. Specifically, deformable convolutions are exploited to deal with spatial turbulent displacement. The features are extracted via a feature pyramid network and Faster R-CNN is employed as a detector. Testing with synthetic VOC dataset, the results show that the proposed framework outperforms the benchmark with mean Average Precision (mAP) score of >30%. Subjective results on the real data are also significantly improved.