LPFF: A Portrait Dataset for Face Generators Across Large Poses
This addresses a domain-specific issue for computer vision researchers and practitioners working on facial generation, but it is incremental as it focuses on dataset creation rather than novel algorithmic breakthroughs.
The paper tackles the problem of face generators struggling with large-pose facial images due to dataset pose imbalance, and introduces LPFF, a dataset of 19,590 high-quality large-pose portraits, which improves 2D and 3D-aware generators by extending latent space and enhancing view consistency and 3D reconstruction.
The creation of 2D realistic facial images and 3D face shapes using generative networks has been a hot topic in recent years. Existing face generators exhibit exceptional performance on faces in small to medium poses (with respect to frontal faces) but struggle to produce realistic results for large poses. The distorted rendering results on large poses in 3D-aware generators further show that the generated 3D face shapes are far from the distribution of 3D faces in reality. We find that the above issues are caused by the training dataset's pose imbalance. In this paper, we present LPFF, a large-pose Flickr face dataset comprised of 19,590 high-quality real large-pose portrait images. We utilize our dataset to train a 2D face generator that can process large-pose face images, as well as a 3D-aware generator that can generate realistic human face geometry. To better validate our pose-conditional 3D-aware generators, we develop a new FID measure to evaluate the 3D-level performance. Through this novel FID measure and other experiments, we show that LPFF can help 2D face generators extend their latent space and better manipulate the large-pose data, and help 3D-aware face generators achieve better view consistency and more realistic 3D reconstruction results.