Text-Conditioned Generative Model of 3D Strand-based Human Hairstyles

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HAAR: Text-Conditioned Generative Model of 3D Strand-based Human Hairstyles

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Text-Conditioned Generative Model of 3D Strand-based Human Hairstyles

Haar%2bteaser — Given a text description, our method produces realistic human 3D strand-based hairstyles. To do that we train the diffusion model in the latent space of a hairstyle using a shared UV space. By leveraging 2D visual question-answering (VQA) systems, we automatically annotate synthetic hair models that are generated from a small set of artist-created hairstyles. We condition our diffusion model on this hairstyle description using a powerful cross-attention procedure. The usage of a 3D strand-based geometry representation allows generated hairstyles to be easily incorporated into existing computer graphics pipelines for simulation and rendering.

We present HAAR, a new strand-based generative model for 3D human hairstyles. Specifically, based on textual inputs, HAAR produces 3D hairstyles that could be used as production-level assets in modern computer graphics engines. Current AI-based generative models take advantage of powerful 2D priors to reconstruct 3D content in the form of point clouds, meshes, or volumetric functions. However, by using the 2D priors, they are intrinsically limited to only recovering the visual parts. Highly occluded hair structures can not be reconstructed with those methods, and they only model the "outer shell", which is not ready to be used in physics-based rendering or simulation pipelines. In contrast, we propose a first text-guided generative method that uses 3D hair strands as an underlying representation. Leveraging 2D visual question-answering (VQA) systems, we automatically annotate synthetic hair models that are generated from a small set of artist-created hairstyles. This allows us to train a latent diffusion model that operates in a common hairstyle UV space. In qualitative and quantitative studies, we demonstrate the capabilities of the proposed model and compare it to existing hairstyle generation approaches.