Modeling and rendering of metallic patinas
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Flow and changes in appearance
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Modeling and rendering of weathered stone
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
IEEE Computer Graphics and Applications
ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part IV
Appearance manifolds for modeling time-variant appearance of materials
ACM SIGGRAPH 2006 Papers
Time-varying surface appearance: acquisition, modeling and rendering
ACM SIGGRAPH 2006 Papers
Interactive image completion with perspective correction
The Visual Computer: International Journal of Computer Graphics
Technical Section: A survey of aging and weathering phenomena in computer graphics
Computers and Graphics
Image-guided weathering: A new approach applied to flow phenomena
ACM Transactions on Graphics (TOG)
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Weathering and aging effects are essential for synthesizing realistic outdoor images in the field of film production and scene production. The problem here is that photographed materials do not yield desired images without editing, and manual painting requires laborintensive work as well as professional skills. In this paper, we focus on a salient aging effect, stains by water flows, and present a system that allows the user to add such stains directly and easily onto outdoor images. Our system represents a water droplet with a particle and simulates the dissolution, transport and sedimentation of deposits using particles in the regions specified by the user. In the simulation, realistic and complex stains can be obtained by accounting for the roughness of the surface where water flows. Furthermore, the user can adjust the amount of deposits according to the perspective in the image. The quick feedback of the simulation enables interactive manipulation. We demonstrate the effectiveness of our system through various results and user evaluations.