Table 6.75—DRM_Diffuse_Colour
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Property |
Description |
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Superclass |
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Class |
· <DRM Diffuse Colour> |
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Subclass |
· none |
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Definition |
An object of this DRM class specifies the diffuse reflectance of a <DRM Primitive Colour. a. dependent on the angle of the lit object to the light source b. independent of the angle of the lit object to the observer. Surfaces exhibiting only diffuse reflection (also known as Lambertian reflection) are dull, matte surfaces that appear equally bright from all viewing angles. When a beam of light is reflected from such a surface, the reflected ray is diffused to cover an area whose size is inversely proportional to the cosine of the angle that the beam makes with the surface normal. Diffuse reflection provides what is known as "shape from shading" information to visual perception; that is, for a surface composed of a single substance and illuminated by a single light source, the shading of the object can be used to compute its surface normals (i.e., its shape). See 16.1.2 of [Bib.FOLE] for further discussion of diffuse reflectance. |
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Example(s) |
· See <DRM Primitive Colour. |
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Inherited field elements |
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Field elements |
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Associated to (one-way) (inherited) |
· none |
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Associated to (one-way) |
· none |
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Associated by (one-way) (inherited) |
· none |
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Associated by (one-way) |
· none |
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Associated with (two-way) (inherited) |
· none |
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Associated with (two-way) |
· none |
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Composed of (two-way) (inherited) |
· none |
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Composed of (two-way) |
· one <DRM Color Data> |
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Composed of (two-way metadata) (inherited) |
· none |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
· none |
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Component of (two-way) |
· zero or one <DRM Light Source> · zero or one <DRM Primitive Colour> |
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Constraints |
· none |
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Notes |
none |
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Class diagram |