Piotrowski, LisaMotejat, MichaelRössl, ChristianTheisel, HolgerBermano, Amit H.Kalogerakis, Evangelos2024-04-302024-04-3020241467-8659https://doi.org/10.1111/cgf.15056https://diglib.eg.org/handle/10.1111/cgf15056Interpolation between camera positions is a standard problem in computer graphics and can be considered the foundation of camera path planning. As the basis for a new interpolation method, we introduce a new Riemannian metric in camera space, which measures the 3D image flow under a small movement of the camera. Building on this, we define a linear interpolation between two cameras as shortest geodesic in camera space, for which we provide a closed-form solution after a mild simplification of the metric. Furthermore, we propose a geodesic Catmull-Rom interpolant for keyframe camera animation. We compare our approach with several standard camera interpolation methods and obtain consistently better camera paths especially for cameras with extremely varying scales.Attribution 4.0 International LicenseCCS Concepts: Computing methodologies -> Computer graphics; Perception; Human-centered computing -> Interaction techniquesComputing methodologiesComputer graphicsPerceptionHuman centered computingInteraction techniques10.1111/cgf.1505613 pages