Video Google: A Text Retrieval Approach to Object Matching in Videos
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Auto coloring with character registration
Proceedings of the 2006 international conference on Game research and development
As-rigid-as-possible image registration for hand-drawn cartoon animations
Proceedings of the 7th International Symposium on Non-Photorealistic Animation and Rendering
TexToons: practical texture mapping for hand-drawn cartoon animations
Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering
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Hand-drawn animations are fascinating due to their expressiveness. In the production pipeline, manual coloring of line drawings is tedious and labor-intensive. We propose a method for accelerating the coloring step by matching corresponding regions in successive frames and propagating the same color to the regions. We derive a matching cost between two regions based on ellipses that approximate the orientations, scales and positions of regions. Such ellipses are insensitive to frequent changes of the region-contour shape un-like contour-based features used in previous methods. Our method finds an optimal matching that minimizes the total matching cost quickly. We demonstrate the speed and the matching accuracy of our method with comparisons.