DC3DO: Diffusion Classifier for 3D Objects
This addresses 3D object classification for computer vision applications, offering a novel generative approach with competitive gains.
The paper tackles 3D object classification by using a class-conditional diffusion model trained on ShapeNet to enable zero-shot classification without additional training, achieving a 12.5% average improvement over multiview counterparts.
Inspired by Geoffrey Hinton emphasis on generative modeling, To recognize shapes, first learn to generate them, we explore the use of 3D diffusion models for object classification. Leveraging the density estimates from these models, our approach, the Diffusion Classifier for 3D Objects (DC3DO), enables zero-shot classification of 3D shapes without additional training. On average, our method achieves a 12.5 percent improvement compared to its multiview counterparts, demonstrating superior multimodal reasoning over discriminative approaches. DC3DO employs a class-conditional diffusion model trained on ShapeNet, and we run inferences on point clouds of chairs and cars. This work highlights the potential of generative models in 3D object classification.