Feature-based terrain editing from complex sketches

•An algorithm for ordering strokes in a 2D complex sketch.•A method for matching 3D terrain features with 2D user-specified silhouettes.•A method for editing terrain with a collection of multi-view sketches.

We present a new method for first person sketch-based editing of terrain models. As in usual artistic pictures, the input sketch depicts complex silhouettes with cusps and T-junctions, which typically correspond to non-planar curves in 3D. After analysing depth constraints in the sketch based on perceptual cues, our method best matches the sketched silhouettes with silhouettes or ridges of the input terrain. A deformation algorithm is then applied to the terrain, enabling it to exactly match the sketch from the given perspective view, while insuring that none of the user-defined silhouettes is hidden by another part of the terrain. We extend this sketch-based terrain editing framework to handle a collection of multi-view sketches. As our results show, this method enables users to easily personalize an existing terrain, while preserving its plausibility and style.

Graphical abstractWe present a new method for first person sketch-based editing of terrain models. As our results show, our method enables users to easily personalize an existing terrain, while preserving its plausibility and style.Figure optionsDownload full-size imageDownload high-quality image (200 K)Download as PowerPoint slide