  In this work, we introduce Unique3D, a novel image-to-3D framework for
efficiently generating high-quality 3D meshes from single-view images,
featuring state-of-the-art generation fidelity and strong generalizability.
Previous methods based on Score Distillation Sampling (SDS) can produce
diversified 3D results by distilling 3D knowledge from large 2D diffusion
models, but they usually suffer from long per-case optimization time with
inconsistent issues. Recent works address the problem and generate better 3D
results either by finetuning a multi-view diffusion model or training a fast
feed-forward model. However, they still lack intricate textures and complex
geometries due to inconsistency and limited generated resolution. To
simultaneously achieve high fidelity, consistency, and efficiency in single
image-to-3D, we propose a novel framework Unique3D that includes a multi-view
diffusion model with a corresponding normal diffusion model to generate
multi-view images with their normal maps, a multi-level upscale process to
progressively improve the resolution of generated orthographic multi-views, as
well as an instant and consistent mesh reconstruction algorithm called ISOMER,
which fully integrates the color and geometric priors into mesh results.
Extensive experiments demonstrate that our Unique3D significantly outperforms
other image-to-3D baselines in terms of geometric and textural details.
