title: DrawingSpinUp: 3D Animation from Single Character Drawings
summary: Animating various character drawings is an engaging visual content creation
  task. Given a single character drawing, existing animation methods are limited
  to flat 2D motions and thus lack 3D effects. An alternative solution is to
  reconstruct a 3D model from a character drawing as a proxy and then retarget 3D
  motion data onto it. However, the existing image-to-3D methods could not work
  well for amateur character drawings in terms of appearance and geometry. We
  observe the contour lines, commonly existing in character drawings, would
  introduce significant ambiguity in texture synthesis due to their
  view-dependence. Additionally, thin regions represented by single-line contours
  are difficult to reconstruct (e.g., slim limbs of a stick figure) due to their
  delicate structures. To address these issues, we propose a novel system,
  DrawingSpinUp, to produce plausible 3D animations and breathe life into
  character drawings, allowing them to freely spin up, leap, and even perform a
  hip-hop dance. For appearance improvement, we adopt a removal-then-restoration
  strategy to first remove the view-dependent contour lines and then render them
  back after retargeting the reconstructed character. For geometry refinement, we
  develop a skeleton-based thinning deformation algorithm to refine the slim
  structures represented by the single-line contours. The experimental
  evaluations and a perceptual user study show that our proposed method
  outperforms the existing 2D and 3D animation methods and generates high-quality
  3D animations from a single character drawing. Please refer to our project page
  (https://lordliang.github.io/DrawingSpinUp) for the code and generated
  animations.
paper_authors._id: 66e8303b89d2a8527c891d52
paper_authors.name: Jie Zhou
paper_authors.status: claimed_verified
paper_authors.statusLastChangedAt: 2024-10-28T11:27:09.543Z
paper_authors._id: 6499763410f1f8fed8f6c590
paper_authors.avatarUrl: /avatars/cd02cb9abb899ffdec7056079c89da96.svg
paper_authors.fullname: ZHOU Jie
paper_authors.type: user
paper_authors.user: LordLiang
paper_authors._id: 66e8303b89d2a8527c891d53
paper_authors.name: Chufeng Xiao
paper_authors.status: admin_assigned
paper_authors.statusLastChangedAt: 2024-09-17T07:55:00.849Z
paper_authors._id: 63a2ca27dca41424cb8387a3
paper_authors.avatarUrl: /avatars/ae9bec9c2326184e94faa8d6fd98f2da.svg
paper_authors.fullname: X
paper_authors.type: user
paper_authors.user: Chufeng
paper_authors._id: 66e8303b89d2a8527c891d54
paper_authors.name: Miu-Ling Lam
paper_authors._id: 66e8303b89d2a8527c891d55
paper_authors.name: Hongbo Fu
paper_authors.status: admin_assigned
paper_authors.statusLastChangedAt: 2024-09-17T07:54:45.373Z
paper_authors._id: 662cd8b9322afcbae53fb06e
paper_authors.avatarUrl: /avatars/9847f5c2282d49e61e76a0a303e0b2b1.svg
paper_authors.fullname: fuhongbo
paper_authors.type: user
paper_authors.user: fuhongbo
paper_title: DrawingSpinUp: 3D Animation from Single Character Drawings
paper_summary: Animating various character drawings is an engaging visual content creation
  task. Given a single character drawing, existing animation methods are limited
  to flat 2D motions and thus lack 3D effects. An alternative solution is to
  reconstruct a 3D model from a character drawing as a proxy and then retarget 3D
  motion data onto it. However, the existing image-to-3D methods could not work
  well for amateur character drawings in terms of appearance and geometry. We
  observe the contour lines, commonly existing in character drawings, would
  introduce significant ambiguity in texture synthesis due to their
  view-dependence. Additionally, thin regions represented by single-line contours
  are difficult to reconstruct (e.g., slim limbs of a stick figure) due to their
  delicate structures. To address these issues, we propose a novel system,
  DrawingSpinUp, to produce plausible 3D animations and breathe life into
  character drawings, allowing them to freely spin up, leap, and even perform a
  hip-hop dance. For appearance improvement, we adopt a removal-then-restoration
  strategy to first remove the view-dependent contour lines and then render them
  back after retargeting the reconstructed character. For geometry refinement, we
  develop a skeleton-based thinning deformation algorithm to refine the slim
  structures represented by the single-line contours. The experimental
  evaluations and a perceptual user study show that our proposed method
  outperforms the existing 2D and 3D animation methods and generates high-quality
  3D animations from a single character drawing. Please refer to our project page
  (https://lordliang.github.io/DrawingSpinUp) for the code and generated
  animations.
paper_ai_summary: A new system, DrawingSpinUp, reconstructs 3D models from 2D character drawings and applies motion data to generate high-quality 3D animations.
paper_ai_keywords: image-to-3D 3D reconstruction contour lines texture synthesis view-dependence skeleton-based thinning deformation 3D animation retargeting appearance improvement