A fast alternative to Phong's specular model
Graphics gems IV
Image-based modeling and photo editing
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Lumo: illumination for cel animation
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Shadows and shading flow fields
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Luminance re-mapping for the control of apparent material
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BRDF-Shop: Creating Physically Correct Bidirectional Reflectance Distribution Functions
IEEE Computer Graphics and Applications
Tweakable light and shade for cartoon animation
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A first-order analysis of lighting, shading, and shadows
ACM Transactions on Graphics (TOG)
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Illustration of complex real-world objects using images with normals
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Image vectorization using optimized gradient meshes
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ACM SIGGRAPH 2008 papers
Real-time gradient-domain painting
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Interactive reflection editing
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Interactive on-surface signal deformation
ACM SIGGRAPH 2010 papers
Physically Based Rendering, Second Edition: From Theory To Implementation
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Matting and compositing of transparent and refractive objects
ACM Transactions on Graphics (TOG)
Improving Shape Depiction under Arbitrary Rendering
IEEE Transactions on Visualization and Computer Graphics
CrossShade: shading concept sketches using cross-section curves
ACM Transactions on Graphics (TOG) - SIGGRAPH 2012 Conference Proceedings
Recovering shape from a single image of a mirrored surface from curvature constraints
CVPR '11 Proceedings of the 2011 IEEE Conference on Computer Vision and Pattern Recognition
Shape from specular flow: Is one flow enough?
CVPR '11 Proceedings of the 2011 IEEE Conference on Computer Vision and Pattern Recognition
Texture design and draping in 2D images
EGSR'09 Proceedings of the Twentieth Eurographics conference on Rendering
Sketch and paint-based interface for highlight modeling
SBM'08 Proceedings of the Fifth Eurographics conference on Sketch-Based Interfaces and Modeling
The Visual Computer: International Journal of Computer Graphics
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We present a novel method for producing convincing pictures of shaded objects based entirely on 2D image operations. This approach, which we call image-based shading design, offers direct artistic control in the picture plane by deforming image primitives so that they appear to conform to specific 3D shapes. Using a differential analysis of reflected radiance, we identify the two types of surface flows involved in the depiction of shaded objects, which are consistent with recent perceptual studies. We then introduce two novel deformation operators that closely mimic surface flows while providing direct artistic controls in real-time.