CIRCLE: Convolutional Implicit Reconstruction and Completion for Large-Scale Indoor Scene

We present CIRCLE, a framework for large-scale scene completion and geometric refinement based on local implicit signed distance functions. It is based on an end-to-end sparse convolutional network, CircNet, which jointly models local geometric details and global scene structural contexts, allowing it to preserve fine-grained object detail while recovering missing regions commonly arising in traditional 3D scene data. A novel differentiable rendering module further enables a test-time refinement for better reconstruction quality. Extensive experiments on both real-world and synthetic datasets show that our concise framework is effective, achieving better reconstruction quality while being significantly faster.