Parameter-Free Neural Lens Blur Rendering for High-Fidelity Composites

Input image and object Ours Naive composite Figure 1 : Our approach enables natural and consistent augmentation of images with virtual objects, preserving realistic Depth-of-Field (DoF) effects without requiring prior information such as camera metadata or scene depth. It supports spatially varying blur, as demonstrated by the virtual horse: its head remains in focus while the tail appears out of focus, consistent with the background.