Shape Consistent 2D Keypoint Estimation under Domain Shift
This addresses domain adaptation for keypoint prediction, which is important for computer vision applications like pose estimation, but it is incremental as it builds on existing unsupervised domain adaptation trends.
The paper tackles the problem of 2D keypoint estimation under domain shift by proposing a deep adaptation framework that combines feature alignment, adversarial training, and self-supervision, and it outperforms state-of-the-art methods on three benchmarks.
Recent unsupervised domain adaptation methods based on deep architectures have shown remarkable performance not only in traditional classification tasks but also in more complex problems involving structured predictions (e.g. semantic segmentation, depth estimation). Following this trend, in this paper we present a novel deep adaptation framework for estimating keypoints under domain shift}, i.e. when the training (source) and the test (target) images significantly differ in terms of visual appearance. Our method seamlessly combines three different components: feature alignment, adversarial training and self-supervision. Specifically, our deep architecture leverages from domain-specific distribution alignment layers to perform target adaptation at the feature level. Furthermore, a novel loss is proposed which combines an adversarial term for ensuring aligned predictions in the output space and a geometric consistency term which guarantees coherent predictions between a target sample and its perturbed version. Our extensive experimental evaluation conducted on three publicly available benchmarks shows that our approach outperforms state-of-the-art domain adaptation methods in the 2D keypoint prediction task.