Subsurface texture mapping

François, Guillaume; Pattanaik, Sumanta; Bouatouch, Kadi; Breton, Gaspard

doi:10.1145/1179849.1180064

Cited by 5 publications

(15 citation statements)

References 15 publications

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“…The images generated by the proposed model were compared with photographs taken during light and drug pupil-induced dilation. It also suggested some possibilities for future work supporting the ILIT model (LAM; BARANOSKI, 2006) and the François et al (2008) 3D rendering technique. Figure 6.9: A subset of the 22 feature points from subject number two tracked along the dilation process: (a) to (e).…”

Section: Discussionmentioning

confidence: 99%

“…Such a model can be extended with a height map in a way similar to the technique described in (FRANÇOIS et al, 2008). The rendering of this new model will include support to self-shadowing and view-motion parallax, noticeable in closeup views.…”

Section: Discussion and Future Workmentioning

confidence: 99%

“…Finally, François et al (2008; estimate iris height maps 6 from gray-scale images. Since they assume the light scatters more in thicker regions of the iris and less in thinner parts, given a gray-scale picture of an iris, the darker parts of the image represent 5 A set of simulation techniques in which the light penetrates the surface of a translucent material and is scattered by interacting with internal tissues of the object.…”

Section: Related Work In Computer Graphicsmentioning

confidence: 99%

“…Their future work intent to recover, from iris images, an approximation to respective densities of eumelanin and pheomelanin pigment found in Stromal and ABL layers (discussed in Chapter 3), needed by Lam and Baranoski model (2006). (FRANÇOIS et al, 2008). Sagar et al (1994) developed an anatomically detailed model of the eye to be used in a surgical simulator.…”

Section: Related Work In Computer Graphicsmentioning

confidence: 99%

“…Since the implementation of the proposed model uses texture mapping on planar triangle strips, and recalling that François et al (2008) uses a height map to build a 3D mesh of the iris, one can extend the triangle strip by adding the height map to it, whose rendering allows, in close up views, the perception of shadows. Relief information could be added to the proposed model in a straightforward way, allowing some interesting shading effects such as projected shadows and self-occlusions (POLICARPO; OLIVEIRA; COMBA, 2005; OLIVEIRA; .…”

Section: Animating the Deformed Iridal Patternsmentioning

confidence: 99%

See 4 more Smart Citations

Photorealistic models for pupil light reflex and iridal pattern deformation

2009

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We introduce a physiologically-based model for pupil light reflex (PLR) and an image-based model for iridal pattern deformation. Our PLR model expresses the pupil diameter as a function of the lighting of the environment, and is described by a delay-differential equation, naturally adapting the pupil diameter even to abrupt changes in light conditions. Since the parameters of our PLR model were derived from measured data, it correctly simulates the actual behavior of the human pupil. Another contribution of our work is a model for realistic deformation of the iris pattern as a function of pupil dilation and constriction. Our models produce high-fidelity appearance effects and can be used to produce real-time predictive animations of the pupil and iris under variable lighting conditions. We assess the predictability and quality of our simulations through comparisons of modeled results against measured data derived from experiments also described in this work. Combined, our models can bring facial animation to new photorealistic standards.

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Section: Discussionmentioning

confidence: 99%

Section: Discussion and Future Workmentioning

confidence: 99%

Section: Related Work In Computer Graphicsmentioning

confidence: 99%

Section: Related Work In Computer Graphicsmentioning

confidence: 99%

Section: Animating the Deformed Iridal Patternsmentioning

confidence: 99%

See 3 more Smart Citations

Photorealistic models for pupil light reflex and iridal pattern deformation

2009

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Real-Time Realistic Skin Translucency

Jiménez

Whelan

Sundstedt

et al. 2010

IEEE Comput. Grap. Appl.

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Image-Based Modeling of the Human Eye

François

Gautron

Breton

et al. 2009

IEEE Trans. Visual. Comput. Graphics

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Abstract-Rendering realistic organic materials is a challenging issue. The human eye is an important part of nonverbal communication which, consequently, requires specific modeling and rendering techniques to enhance the realism of virtual characters. We propose an image-based method for estimating both iris morphology and scattering features in order to generate convincing images of virtual eyes. In this regard, we develop a technique to unrefract iris photographs. We model the morphology of the human iris as an irregular multilayered tissue. We then approximate the scattering features of the captured iris. Finally, we propose a real-time rendering technique based on the subsurface texture mapping representation and introduce a precomputed refraction function as well as a caustic function, which accounts for the light interactions at the corneal interface.Index Terms-Three-dimensional graphics and realism, image-based rendering, physically based modeling.

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Subsurface texture mapping

Cited by 5 publications

References 15 publications

Photorealistic models for pupil light reflex and iridal pattern deformation

Photorealistic models for pupil light reflex and iridal pattern deformation

Real-Time Realistic Skin Translucency

Image-Based Modeling of the Human Eye

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