Robust multispectral pedestrian detection via spectral position-free feature mapping

Recently, although multispectral pedestrian detection has achieved remarkable performances, there is still a problem to be handled, position shift problem. Due to the problem, a pedestrian looks like existing in different positions between each modal image. Then, a single bounding box usually fails to capture an entire pedestrian properly in both modal images at the same time, which means it would not contain some parts of a pedestrian and includes noisy backgrounds instead. In this paper, we propose a novel approach, that is, a pedestrian feature mapping from mis-captured pedestrian features to well-captured pedestrian features which encode an entire pedestrian properly in both modal images. To this end, we utilize a memory architecture which stores well-captured pedestrian features, and then, the well-captured features can enhance the quality of pedestrian representation by providing the distinctive information of a pedestrian. We validate the effectiveness of our approach with comprehensive experiments on two multispectral pedestrian detection datasets, achieving state-of-the-art performances.