  In this era, the success of large language models and text-to-image models
can be attributed to the driving force of large-scale datasets. However, in the
realm of 3D vision, while remarkable progress has been made with models trained
on large-scale synthetic and real-captured object data like Objaverse and
MVImgNet, a similar level of progress has not been observed in the domain of
human-centric tasks partially due to the lack of a large-scale human dataset.
Existing datasets of high-fidelity 3D human capture continue to be mid-sized
due to the significant challenges in acquiring large-scale high-quality 3D
human data. To bridge this gap, we present MVHumanNet, a dataset that comprises
multi-view human action sequences of 4,500 human identities. The primary focus
of our work is on collecting human data that features a large number of diverse
identities and everyday clothing using a multi-view human capture system, which
facilitates easily scalable data collection. Our dataset contains 9,000 daily
outfits, 60,000 motion sequences and 645 million frames with extensive
annotations, including human masks, camera parameters, 2D and 3D keypoints,
SMPL/SMPLX parameters, and corresponding textual descriptions. To explore the
potential of MVHumanNet in various 2D and 3D visual tasks, we conducted pilot
studies on view-consistent action recognition, human NeRF reconstruction,
text-driven view-unconstrained human image generation, as well as 2D
view-unconstrained human image and 3D avatar generation. Extensive experiments
demonstrate the performance improvements and effective applications enabled by
the scale provided by MVHumanNet. As the current largest-scale 3D human
dataset, we hope that the release of MVHumanNet data with annotations will
foster further innovations in the domain of 3D human-centric tasks at scale.
