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The process of constructing a discrete representation of a quantity that is usually regarded as continuous (see discrete and continuous systems). For example, the measurement of the amplitude of a signal at discrete intervals of time, when the signal occurs over continuous time, is called time quantization, or sampling; the measurement of the brightness of picture elements (pixels) in a space-continuous picture is called space quantization, or pixelization.

The term quantization without the predication of time or space usually refers to the quantization of amplitude; the same applies to digitization, which is nearly synonymous with quantization.

Subjects: Computing.

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