Efficient Implicit SDF and Color Reconstruction via Shared Feature Field

In this study, we introduce a simple yet effective encoder-decoder framework that encodes positional and viewpoint coordinates into a shared feature field (SFF). This feature field is then decoded into an implicit signed distance field (SDF) and a color field. By employing a weight-sharing encoder, we enhance the joint optimization of the SDF and color field, enabling better utilization of the limited information in the scene. Additionally, we incorporate a periodic sine function as an activation function, eliminating the need for a positional encoding layer and significantly reducing rippling artifacts on surfaces.