Automatic and topology-preserving gradient mesh generation for image vectorization
ACM SIGGRAPH 2009 papers
TexToons: practical texture mapping for hand-drawn cartoon animations
Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering
Applying multiquadric quasi-interpolation for boundary detection
Computers & Mathematics with Applications
Antialiasing recovery for edit propagation
Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry
Structure Preserving Manipulation and Interpolation for Multi-element 2D Shapes
Computer Graphics Forum
VEA 2012: Efficient antialiased edit propagation for images and videos
Computers and Graphics
Topology-driven vectorization of clean line drawings
ACM Transactions on Graphics (TOG)
Structural vectorization of raster images
Proceedings of the 27th Conference on Image and Vision Computing New Zealand
Stereoscopizing cel animations
ACM Transactions on Graphics (TOG)
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We present a system for vectorizing 2D raster format cartoon animations. The output animations are visually flicker free, smaller in file size, and easy to edit. We identify decorative lines separately from colored regions. We use an accurate and semantically meaningful image decomposition algorithm, supporting an arbitrary color model for each region. To ensure temporal coherence in the output, we reconstruct a universal background for all frames and separately extract foreground regions. Simple user-assistance is required to complete the background. Each region and decorative line is vectorized and stored together with their motions from frame to frame. The contributions of this paper are: 1) the new trapped-ball segmentation method, which is fast, supports nonuniformly colored regions, and allows robust region segmentation even in the presence of imperfectly linked region edges, 2) the separate handling of decorative lines as special objects during image decomposition, avoiding results containing multiple short, thin oversegmented regions, and 3) extraction of a single patch-based background for all frames, which provides a basis for consistent, flicker-free animations.