Calipso: Physics-based Image and Video Editing through CAD Model Proxies

TL;DR

Calipso enables physically-coherent image and video editing by simulating physics on CAD model proxies, allowing realistic manipulations and deformations that are transferred back to 2D content with high fidelity.

Contribution

We introduce Calipso, a novel interactive framework that combines physics simulation on CAD proxies with photo-realistic rendering for coherent image and video editing.

Findings

Effective physics-based editing demonstrated on diverse examples

High geometric and visual consistency maintained during edits

Flexible manipulation of physical properties and scene dynamics

Abstract

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.