Part-aware Surface Slice and Polarization Implicit Function with Regular Discretization for 3D Human Surface Reconstruction

Detailed 3D human surface reconstruction and editing relies on reasonable and elaborate representations. Currently, representation for 3D human surface can be broadly categorized into mesh-based and function-based approaches. Mesh-based representation offers intuitive visualization of intricate structure but is constrained by resolution limitations. Function-based representation surpasses resolution constraints to achieve higher precision but is spatial redundant for fitting the whole space. To address these challenges, we introduce the Part-aware surface Slice Polarization Implicit Function (PaSP-IF) for 3D human surfaces, aiming at capturing details and reducing redundancy. By establishing polar coordinate systems for slice plane of each body part, we represent the human surface using polar angle and radial distance. Additionally, as for visualization, discretization applied on PaSP-IF can be real-ized by selecting appropriate slice and polar angle resolutions to form the discretized radius matrix. Pixel-level operations can be easily applied on the radius matrix to edit the human surface. Experiments on the THuman2.0 datasets, along with applications in surface editing and clothing transferring, have demonstrated the effectiveness of the proposed representation.