Directional-hemispherical reflectance

Directional-hemispherical reflectance

Directional-hemispherical reflectance is the reflectance of a surface under direct illumination (with no diffuse component). Directional-hemispherical reflectance is the integral of the BRDF over all viewing directions. It is sometimes called "black-sky albedo". See also: Bi-hemispherical reflectance



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  • Bi-hemispherical reflectance — is the reflectance of a surface under diffuse illumination (with no direct component). Bi hemispherical reflectance is the integral of the BRDF over all viewing and illumination directions of a hemisphere. It is sometimes called white sky albedo …   Wikipedia

  • Albedo — The albedo of an object is the extent to which it diffusely reflects light from the sun. It is therefore a more specific form of the term reflectivity. Albedo is defined asthe ratio of diffusely reflected to incident electromagnetic radiation. It …   Wikipedia

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  • Reflectivity — In photometry and heat transfer, reflectivity is the fraction of incident radiation reflected by a surface. In full generality it must be treated as a directional property that is a function of the reflected direction, the incident direction, and …   Wikipedia

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