Computer Vision and Machine Learning

Bharat Lal Bhatnagar (PhD Student)

MSc Bharat Lal Bhatnagar

Max-Planck-Institut für Informatik
Saarland Informatics Campus
Campus E1 4
66123 Saarbrücken
E1 4 - 628
+49 681 9325 2128
+49 681 9325 2099


Adjoint Rigid Transform Network: Task-conditioned Alignment of 3D Shapes
K. Zhou, B. L. Bhatnagar, B. Schiele and G. Pons-Moll
Technical Report, 2021
(arXiv: 2102.01161)
Most learning methods for 3D data (point clouds, meshes) suffer significant performance drops when the data is not carefully aligned to a canonical orientation. Aligning real world 3D data collected from different sources is non-trivial and requires manual intervention. In this paper, we propose the Adjoint Rigid Transform (ART) Network, a neural module which can be integrated with a variety of 3D networks to significantly boost their performance. ART learns to rotate input shapes to a learned canonical orientation, which is crucial for a lot of tasks such as shape reconstruction, interpolation, non-rigid registration, and latent disentanglement. ART achieves this with self-supervision and a rotation equivariance constraint on predicted rotations. The remarkable result is that with only self-supervision, ART facilitates learning a unique canonical orientation for both rigid and nonrigid shapes, which leads to a notable boost in performance of aforementioned tasks. We will release our code and pre-trained models for further research.
LoopReg: Self-supervised Learning of Implicit Surface Correspondences, Pose and Shape for 3D Human Mesh Registration
B. L. Bhatnagar, C. Sminchisescu, C. Theobalt and G. Pons-Moll
Advances in Neural Information Processing Systems 33 (NeurIPS 2020), 2020
Combining Implicit Function Learning and Parametric Models for 3D Human Reconstruction
B. L. Bhatnagar, C. Sminchisescu, C. Theobalt and G. Pons-Moll
Computer Vision -- ECCV 2020, 2020
SIZER: A Dataset and Model for Parsing 3D Clothing and Learning Size Sensitive 3D Clothing
G. Tiwari, B. L. Bhatnagar, T. Tung and G. Pons-Moll
Computer Vision -- ECCV 2020, 2020
Unsupervised Shape and Pose Disentanglement for 3D Meshes
K. Zhou, B. L. Bhatnagar and G. Pons-Moll
Computer Vision -- ECCV 2020, 2020
Learning to Reconstruct People in Clothing from a Single RGB Camera
T. Alldieck, M. A. Magnor, B. L. Bhatnagar, C. Theobalt and G. Pons-Moll
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2019), 2019
Multi-Garment Net: Learning to Dress 3D People from Images
B. L. Bhatnagar, G. Tiwari, C. Theobalt and G. Pons-Moll
International Conference on Computer Vision (ICCV 2019), 2019