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 Title: |
US6198489:
Computer generated watercolor
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Salesin, David H.; Seattle, WA
Curtis, Cassidy; Seattle, WA
Anderson, Sean; Mountain View, CA
Seims, Joshua E.; Seattle, WA
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| Assignee: |
University of Washington, Seattle, WA
other patents from UNIVERSITY OF WASHINGTON (600100) (approx. 459)
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| Published / Filed: |
2001-03-06
/ 1998-02-18
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| Application Number: |
US1998000025412
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| IPC Code: |
Advanced:
G06T 11/00;
Core:
more...
IPC-7:
G06T 11/40;
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| ECLA Code: |
G06T11/00C;
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| U.S. Class: |
Current:
715/784;
Original:
345/431;
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| Field of Search: |
345/429-432
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| Priority Number: |
| 1998-02-18 |
US1998000025412 |
| 1997-02-21 |
US1997000039020P |
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| Abstract: |
A watercolor model based on an ordered set of translucent glazes, which are created independently usinig a shallow water fluid simulation. A Kubelka-Munk compositing model is used for simulating the optical effect of the superimposed glazes. The computer generated watercolor model is used as part of an interactive watercolor paint system, or as a method for automatic image "watercolorization."
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| Primary / Asst. Examiners: |
Powell, Mark R.; Nguyen, Thu
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| Maintenance Status: |
CC Certificate of Correction issued
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| INPADOC Legal Status: |
Show legal status actions
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| Parent Case: |
RELATED APPLICATION
This application is a continuation-in-part of prior copending provisional Application Ser. No. 60/039,020, filed Feb. 21, 1997, priority in the filing date of which is hereby claimed under 35 United States Code Section 119(e).
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| Family: |
None
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First Claim:
Show all 24 claims |
What is claimed is:
1. A method for producing a watercolor simulation that represents at least one wash applied to paper, each wash including at least one pigment dispersed in a fluid, comprising the steps of:
- (a) providing a fluid model that includes a plurality of layers for each wash included in the watercolor simulation, wherein said plurality of layers comprise:
- (i) a shallow fluid layer in which the wash flows above a surface of the paper;
- (ii) a pigment deposition layer where a pigment is adsorbed and desorbed by the paper; and
- (iii) a capillary layer within the paper in which the wash is diffused by a capillary action;
- (b) as a function of a plurality of predefined parameters and in accord with the fluid model, specifying how each wash flows over the paper to determine quantities of each pigment
- (c) applying an optical composite model to render the watercolor simulation as a function of optical characteristics of each pigment and as a function of the quantities of each pigment deposited at the plurality of discrete spatial locations on the paper.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
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| Forward References: |
Show 14 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
Chet S. Haase and Gary W. Meyer, "Modeling Pigmented Materials for Realistic Image Synthesis", ACM Transactions on Graphics, vol. 11, No. 4, Oct. 1992, pp. 305-335, 1992.
(31 pages)
Cited by 3 patents
[ISI abstract]
"Modeling and Rendering of Metallic Patinas" Julie Dorsey and Pat Hanrahan, Computer Graphics Proceedings, 1996.
Chen, Jim X., et al., "Towards Interactive-Rate Simulation of Fluids with Moving Obstacles Using Navier-Stokes Equations," Graphical Models and Image Processing, vol. 57, No. 2, Mar., 1995, pp. 107-116.
(10 pages)
[ISI abstract]
Cockshott, Tunde, et al., "Modelling the Texture of Paint," Eurographics '92, A. Kilgour and L. Kjelldahl (Guest Editors), Blackwell Publishers, vol. 11 (1992), No. 3, © Eurographics Association, 1992, pp. C-217-C-226.
Dorsey, Julie, et al., "Modeling and Rendering Of Metallic Patinas," Computer Graphics Proceedings, Annual Conference Series, 1996, pp. 387-396.
Dorsey, Julie, et al., "Flow and Changes in Appearance," Computer Graphics Proceedings, Annual Conference Series, 1996, pp. 411-420.
Foster, Nick, et al., "Realistic Animation of Liquids," Graphics Interface '96, pp. 204-212.
Guo, Qinglian, "Generating Realistic Calligraphy Words," IEICE Trans. Fundamentals, vol. E78-A, No. 11, Nov. 1995, pp. 1556-1558.
(3 pages)
[ISI abstract]
Guo, Qinglian, et al., "Modeling the Diffuse Paintings of `Sumie`," pp. 329-338.
Kass, Michael, et al., "Rapid, Stable Fluid Dynamics for Computer Graphics," Computer Graphics, vol. 24, No. 4, Aug. 1990, pp. 49-55.
Musgrave, F. Kenton., et al., "The Synthesis and Rendering of Eroded Fractal Terrains," Computer Graphics, vol. 23, No. 3, Jul. 1989, pp. 41-50.
Pham, Binh, "Expressive Brush Strokes," CVGIP: Graphical Models And Image Processing, vol. 53, No. 1, Jan., pp. 1-6, 1991.
(6 pages)
Cited by 3 patents
[ISI abstract]
Small, David, "Simulating Watercolor by Modeling Diffusion, Pigment, and Paper Fibers," SPIE vol. 1460, Image Handling and Reproduction Systems Integration (1991), pp. 140-146.
Strassmann, Steve, "Hairy Brushes," SIGGRAPH '86, Dallas, Aug. 18-22, vol. 20, No. 4, 1986, pp. 225-232.
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