digitizationguidelines.gov

Website:http://www.digitizationguidelines.gov
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Definitions (406)

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ppi


PPI stands for pixels per inch, commonly used in describing the resolution capabilities of an imaging device such as a scanner or the resolution of a digital image. The terms DPI (dots per inch) and P [..]
Source: digitizationguidelines.gov

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data rate


The number of bits that are conveyed or processed per unit of time, most often (but not exclusively) employed when discussing time-based media like sound or video. Often expressed in terms of kilobits [..]
Source: digitizationguidelines.gov

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encoder


An application or algorithm that encodes data, often used for data compression. A decoder is used to play the data, which often entails decompression.…
Source: digitizationguidelines.gov

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jaggies


The visible "steps" of edges or lines around a pixel in a digital image, and is most notable in areas of high contrast. Anti- aliasing can reduce the visibility of the jagged features.…
Source: digitizationguidelines.gov

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white point


A radiometric reference point used to calibrate or define the maximum luminance value of interest in a scene or object.…
Source: digitizationguidelines.gov

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a-to-d converter


Device that receives analog sound waveforms as an input and produces a digital audio stream, most frequently in Linear Pulse Code Modulation encoding.…
Source: digitizationguidelines.gov

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a/d converter


See A-to-D converter
Source: digitizationguidelines.gov

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access file


See Derivative file
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accuracy


The degree to which the information correctly describes the object or process being measured. It can be thought of in terms of how close a reading or average of readings is to a true or target value. [..]
Source: digitizationguidelines.gov

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achromatic


Light perceived as having no hue, this includes the shades of neutral gray from white to black.…
Source: digitizationguidelines.gov


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