Models
BRDFs can be measured directly from real objects using calibrated cameras and lightsources; however, many phenomenological and analytic models have been proposed including the Lambertian reflectance model frequently assumed in computer graphics. Some useful features of recent models include:
- accommodating anisotropic reflection
- editable using a small number of intuitive parameters
- accounting for Fresnel effects at grazing angles
- being well-suited to Monte Carlo methods.
Wojciech et al. found that interpolating between measured samples produced realistic results and was easy to understand.
Read more about this topic: Bidirectional Reflectance Distribution Function
Famous quotes containing the word models:
“Friends broaden our horizons. They serve as new models with whom we can identify. They allow us to be ourselves—and accept us that way. They enhance our self-esteem because they think we’re okay, because we matter to them. And because they matter to us—for various reasons, at various levels of intensity—they enrich the quality of our emotional life.”
—Judith Viorst (20th century)
“French rhetorical models are too narrow for the English tradition. Most pernicious of French imports is the notion that there is no person behind a text. Is there anything more affected, aggressive, and relentlessly concrete than a Parisan intellectual behind his/her turgid text? The Parisian is a provincial when he pretends to speak for the universe.”
—Camille Paglia (b. 1947)
“... your problem is your role models were models.”
—Jane Wagner (b. 1935)