Single-View Sketch Based Surface Modeling

For improving the efficiency of 2D animation production, this paper presents a method to create in-between frames based on hand-drawn key-frames. The outlines of characters or objects on two key-frames are used as inputs. First, a skeleton linkage of the target object is automatically constructed by rasterizing each of input key-frames and then applying a pixel-based skeleton extraction method. Secondary, a pair of skeleton linkages having corresponding structure between the current key-frame and the next key-frame is constructed by applying the stroke matching algorithm. After these processes, motion transitions between the skeleton linkages are generated based on our simulation model. When the in-between frames are created only in the 2D plane, the outlines at in-between frames can be generated by a 2D deformation. In case that the in-between transitions are containing a rotation around an axis which is no perpendicular to the drawing plane, however, a 3D structure is required. For achieving such in-between transitions, our method constructs a 3D structure by inflating 2D mesh based on the input outlines. Finally, the contours from the view-point for the created 3D structure are projected onto the 2D plane during in-between transitions. In our method, we adopt the Photic Extremum Lines (PEL) to extract the 2D contours from the obtained 3D shape. In this way, we achieve the in-between creation containing spatial rotation such as hand-flipping, which has not been achieved by general ways of in-between creation method.

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“…In addition, if animators want to construct more complex 3D structure, a sketch-based 3D modeling algorithm such as [27,28,29] shall be useful.…”

Section: Discussionmentioning

confidence: 99%

Skeleton-based Adaptive In-between Generation for Hand-drawn Key Frames

Kyota

Sugisaki

Seah

et al. 2011

The Journal of the Society for Art and Science

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“…Lacquer is inlayed into the carved track for gluing. 4. Gold powder or leaf is put on the lacquered surface as shown in Figure 2(b) and the piece is placed in a damp environment.…”

Section: Overview Of Chinkinmentioning

confidence: 99%

“…A lot of methods to simulate drawing materials such as brushes and pencils to create 2D CG are developed [1] [2], and methods to generate 3D models automatically from drawn outlines or feature lines are also developed [3] [4]. These methods are useful for many users to create 2D and 3D CG readily as sketching, but some special operations for the systems would be required.…”

Section: Introductionmentioning

confidence: 99%

A method to create sculptures with Chinkin in the virtual space

Mizuno

2010

2010 16th International Conference on Virtual Systems and Multimedia

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In this paper, a method to enable people to experience "Chinkin" in the virtual space is proposed. Chinkin is a traditional artistic technique in Japan and some Asian countries to draw designs on lacquer ware with fine lines and dots, and it was widely used to produce Daimyo's utensils in the Edo period during the 17th and the 19th century. The author develops a virtual Chinkin system based on the virtual sculpting method which is an interactive CG creating method developed by the author. Chinkin consists of some processes and each process is realized by virtual carving: an interactive deformation of solids, and virtual painting: an interactive generation of a 3D texture map. Improvement in a rendering method is also given for more useful operation. In this system, the user can experience each process of the Chinkin technique in the virtual space and can create virtual sculptures ornamented with Chinkin designs as CG. Both the operation and the result are similar to the real ones and it would be useful for introduction, education and preservation of the traditional Chinkin technique.

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“…al. [61], [62] exploited cubic corners in an attempt to reconstruct freeform objects from line drawings, with the postulation that crossing lines on a surface are often perceived as perpendicular to each other in 3D.…”

Section: Cubic Corner In Parallel Projectionmentioning

confidence: 99%

Algorithms for the recovery of 3D objects from 2D line drawings

Fang¹

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Reconstructing the 3D object depicted in a line drawing consistent with human perception is an interesting and important topic in computer vision. Normally, the reconstruction process requires two main steps: topological analysis and 3D recovery. This thesis makes three novel contributions in the three steps: (1) Decomposition of the line drawing of a complex object into a collection of drawings of simple manifolds; (2) Finding the faces of the object in the drawing; (3) Reconstruction of the object in both parallel and perspective projections. The work here

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Single-View Sketch Based Surface Modeling

Cited by 8 publications

References 21 publications

Skeleton-based Adaptive In-between Generation for Hand-drawn Key Frames

Skeleton-based Adaptive In-between Generation for Hand-drawn Key Frames

A method to create sculptures with Chinkin in the virtual space

Algorithms for the recovery of 3D objects from 2D line drawings

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