نتایج جستجو برای: control shading pattern
تعداد نتایج: 1643331 فیلتر نتایج به سال:
Physically grounded shading models have been known for many years, but they have only recently started to replace the " ad-hoc " models in common use for both film and game production. Compared to " ad-hoc " models, which require laborious tweaking to produce high-quality images, physically-based, energy-conserving shading models easily create materials that hold up under a variety of lighting ...
We studied the integration of image disparities, edge information, and shading in the three-dimensional perception of complex yet well-controlled images generated with a computer-graphics system. The images showed end-on views of flat- and smooth-shaded ellipsoids, i.e., images with and without intensity discontinuities (edges). A map of perceived depth was measured by adjusting a small stereo ...
In this paper, we present our practical examples of physically based shading models that we implemented. In the game industry, traditional ad-hoc shading models are mainly used because of performance, though recently, physically based models have been attracting more attention. In our studio, artists had some difficulty setting parameters for physically correct materials using the following ad ...
Influence of local scene colour on target detection tested by global rearrangement of natural scenes
Local scene colour can influence the visual detectability of an object or target, but so can the familiarity, meaning, and global organisation of the scene. The aim of this study was to test whether the effects of local scene colour on target detectability are secondary to global effects. A target-detection task was undertaken by human observers with coloured images of natural scenes that were ...
Complex procedural shaders are commonly used to enrich the appearance of high-quality computer animations. In traditional rendering architectures the shading computation is performed independently for each animation frame which leads to significant costs. In this paper we propose an approach which eliminates redundant computation between subsequent frames by exploiting temporal coherence in sha...
Self-shading of light by algae growing in a column of water plays an important:role in the dynamics of algal blooms. Thus without self-shading the algal concentration would increase more rapidly, making the nutrient limitation too strong. Apart from the practical importance of self-shading, its inherent nonlinearity in the growth dynamics leads to an interesting mathematical problem, which warr...
Existing Shape from Shading algorithms are not robust enough to work reliably with real images. We present a new paradigm for Shape from Shading based upon & scale space surface representation. Using this representation, the Shape from Shading problem becomes one of forming a surface from gaussian basis functions in such a way that the shading in the original image is explained. The algorithm i...
Motivated by recent findings in the field of visual perception, we present a novel approach for enhancing shape depiction and perception surface details. We propose shading-based technique that relies on locally adjusting direction light to account different components materials. Our ensures congruence between shading flows, leading an effective enhancement details while impairing neither light...
Ray-traced global illumination (GI) is becoming widespread in production rendering but incoherent secondary ray traversal limits practical rendering to scenes that fit in memory. Incoherent shading also leads to intractable performance with production-scale textures forcing renderers to resort to caching of irradiance, radiosity, and other values to amortize expensive shading. Unfortunately, su...
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