ATIS Telecom Glossary
Wednesday, April 23, 2014

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density
In a facsimile system, a measure of the light transmission or reflection properties of an area of an object. Note 1: Density is usually expressed as the logarithm to the base 10 of the ratio of incident to transmitted or reflected irradiance. Note 2: There are many types of density, such as diffuse, double diffuse, and specular density, each of which will usually have different numerical values for different materials. The relevant type of density depends on the type of optical system, the component materials of the object, and the surface characteristics of the object. 2. In video, the degree of darkness of an image, or the percent of the screen used in an image. 3. In optics, a figure of merit that describes the degree of attenuation introduced by a filter.

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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