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  1. Proceedings of the 4th international symposium on Non-photorealistic animation and rendering (NPAR '06)
  2. X-toon: an extended toon shader
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The electric sheep and their dreams in high fidelity
Real-time watercolor illustrations of plants using a blurred depth test
Color sketch generation
A spectral approach to NPR packing
Empathic painting: interactive stylization through observed emotional state
X-toon: an extended toon shader
Real-time rendering of cartoon smoke and clouds
Felt-based rendering
Organic labyrinths and mazes
Interactive 3D fluid jet painting
Tweakable light and shade for cartoon animation
Real-time pen-and-ink illustration of landscapes
Stylizing 2.5-D video
Modeling plant structures using concept sketches
Interactive watercolor rendering with temporal coherence and abstraction
Real-time pencil rendering
Non-photorealistic rendering in context: an observational study

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X-toon: an extended toon shader

Content Provider ACM Digital Library
Author Barla, Pascal Markosian, Lee Thollot, Joƫlle
Abstract Traditional toon shading uses a 1D texture that describes how tone varies with surface orientation relative to a given light source. In this paper we describe two extensions to the basic algorithm that support view-dependent effects. First, we replace the 1D texture with a 2D texture whose second dimension corresponds to the desired "tone detail," which can vary with depth or surface orientation. This supports effects such as levels-of-abstraction, aerial perspective, depth-of-field, backlighting, and specular highlights.Second, we further extend the toon shader to use a modified normal field that can range from the original normals to a simpler set of normals taken from an "abstracted shape." A global shape detail parameter determines the degree of interpolation between the original and abstracted normal fields. We explain how to implement these ideas efficiently on the GPU via vertex and fragment shaders, and discuss ways to extend our approach to alternative tone and shape detail maps.
Starting Page 127
Ending Page 132
Page Count 6
File Format PDF
ISBN 1595933573
DOI 10.1145/1124728.1124749
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2006-06-05
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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