Abstract
A challenge that remains open in 3D deep learning is how to efficiently represent 3D data to feed deep neural networks. Recent works have been relying on volumetric or point cloud representations, but such approaches suffer from a number of issues such as computational complexity, unordered data, and lack of finer geometry. An efficient way to represent a 3D shape is through a polygon mesh as it encodes both shape’s geometric and topological information. However, the mesh’s data structure is an irregular graph (i.e. collection of vertices connected by edges to form polygonal faces) and it is not straightforward to integrate it into learning frameworks since every mesh is likely to have a different structure. Here we address this drawback by efficiently converting an unstructured 3D mesh into a regular and compact shape parametrization that is ready for machine learning applications. We developed a simple and lightweight learning framework able to reconstruct high-quality 3D meshes from a single image by using a compact representation that encodes a mesh using free-form deformation and sparse linear combination in a small dictionary of 3D models. In contrast to prior work, we do not rely on classical silhouette and landmark registration techniques to perform the 3D reconstruction. We extensively evaluated our method on synthetic and real-world datasets and found that it can efficiently and compactly reconstruct 3D objects while preserving its important geometrical aspects.
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Acknowledgements
This research was supported by the grants ARC DP170100632, ARC FT170100072 and NSF 1526033.
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Pontes, J.K., Kong, C., Sridharan, S., Lucey, S., Eriksson, A., Fookes, C. (2019). Image2Mesh: A Learning Framework for Single Image 3D Reconstruction. In: Jawahar, C., Li, H., Mori, G., Schindler, K. (eds) Computer Vision – ACCV 2018. ACCV 2018. Lecture Notes in Computer Science(), vol 11361. Springer, Cham. https://doi.org/10.1007/978-3-030-20887-5_23
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