A physically based approach to 2–D shape blending
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
Painterly rendering for animation
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Painterly rendering with curved brush strokes of multiple sizes
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
Deep canvas in Disney's Tarzan
ACM SIGGRAPH 99 Conference abstracts and applications
Painterly rendering for video and interaction
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
Stylized rendering techniques for scalable real-time 3D animation
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
Artistic silhouettes: a hybrid approach
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
Harold: a world made of drawings
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
NPAR '02 Proceedings of the 2nd international symposium on Non-photorealistic animation and rendering
WYSIWYG NPR: drawing strokes directly on 3D models
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Shape Blending Using the Star-Skeleton Representation
IEEE Computer Graphics and Applications
Inbetweening for computer animation utilizing moving point constraints
SIGGRAPH '81 Proceedings of the 8th annual conference on Computer graphics and interactive techniques
The problems of computer-assisted animation
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
Image and video based painterly animation
Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering
Keyframe-based tracking for rotoscoping and animation
ACM SIGGRAPH 2004 Papers
Real-time simulation of watery paint: Natural Phenomena and Special Effects
Computer Animation and Virtual Worlds - CASA 2005
Hi-index | 0.00 |
In this paper we argue for our NPAR system as an effective 2D alternative to most of NPR research which is focused on frame coherent stylised rendering of 3D models. Our approach gives a highly stylised look to images without the support of 3D models, and yet they still behave as though animated by drawing, which they are. First, a stylised brush tool is used to freely draw extreme poses of characters. Each character is built up of 2D drawn brush strokes which are manually grouped into layers. Each layer is assigned its place in a drawing hierarchy called a Hierarchical Display Model (HDM). Next, multiple HDMs are created for the same character, each corresponding to a specific view. A collection of HDMs essentially reintroduces some correspondence information to the 2D drawings needed for in-betweening and, in effect, eliminates the need for a true 3D model. Once the models are composed the animator starts by defining keyframes from extreme poses in time. Next, brush stroke trajectories defined by the keyframe HDMs are in-betweened automatically across intermediate frames. Finally, each HDM of each generated in-between frame is traversed and all elements are drawn one on another from back to front. Our techniques support highly rendered styles which are particularly difficult to animate by traditional means including the ‘airbrushed', scraperboard, watercolour, Gouache, ‘ink-wash', and the ‘crayon' styles. We believe our system offers a new fresh perspective on computer aided animation production and associated tools.