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Linear key
A) A term given to a key which contains soft edges and information at many different luminance levels. This is the ability of the keyer to key many levels linearly and means the keyer has a gain close to one. b) A process for the selective overlay of one video image upon another, as through chroma key. Control of the ratio of foreground to background is determined by the specifications derived from luminance information, and provided in the linear key data. Ratios to be applied are carried for each picture element in the alpha channel. The process permits realistic rendering of semi-transparent objects.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Software
- Category: Video editing
- Company: Tektronix
- Product:
- Acronym-Abbreviation:
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