Stroke Correspondence by Labeling Closed Areas
This addresses the burden on animators in the production pipeline of hand-drawn inbetweening frames, though it appears incremental as it builds on existing stroke correspondence methods.
The paper tackles the problem of manually constructing stroke correspondences between keyframes in hand-drawn animation, which is time-consuming for animators, by proposing a method that estimates these correspondences without vectorization, achieving effectiveness demonstrated through a user study and comparisons with conventional approaches.
Constructing stroke correspondences between keyframes is one of the most important processes in the production pipeline of hand-drawn inbetweening frames. This process requires time-consuming manual work imposing a tremendous burden on the animators. We propose a method to estimate stroke correspondences between raster character images (keyframes) without vectorization processes. First, the proposed system separates the closed areas in each keyframe and estimates the correspondences between closed areas by using the characteristics of shape, depth, and closed area connection. Second, the proposed system estimates stroke correspondences from the estimated closed area correspondences. We demonstrate the effectiveness of our method by performing a user study and comparing the proposed system with conventional approaches.