Calipso: Physics-based Image and Video Editing through CAD Model Proxies
This addresses the challenge of creating physically plausible edits in 2D media for users in graphics and content creation, though it is incremental as it builds on existing simulation and alignment techniques.
The authors tackled the problem of enabling physics-based editing of images and videos by using CAD model proxies and full physics simulations, resulting in a method that allows users to apply forces, change physical parameters, and add objects while maintaining physical coherence and visual consistency.
We present Calipso, an interactive method for editing images and videos in a physically-coherent manner. Our main idea is to realize physics-based manipulations by running a full physics simulation on proxy geometries given by non-rigidly aligned CAD models. Running these simulations allows us to apply new, unseen forces to move or deform selected objects, change physical parameters such as mass or elasticity, or even add entire new objects that interact with the rest of the underlying scene. In Calipso, the user makes edits directly in 3D; these edits are processed by the simulation and then transfered to the target 2D content using shape-to-image correspondences in a photo-realistic rendering process. To align the CAD models, we introduce an efficient CAD-to-image alignment procedure that jointly minimizes for rigid and non-rigid alignment while preserving the high-level structure of the input shape. Moreover, the user can choose to exploit image flow to estimate scene motion, producing coherent physical behavior with ambient dynamics. We demonstrate Calipso's physics-based editing on a wide range of examples producing myriad physical behavior while preserving geometric and visual consistency.