Subsampling: Difference between revisions

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{{wiktionary|subsampling}}

{{for|the signal processing technique|Downsampling}}

{{distinguish|Undersampling}}

In computer graphics, '''subsampling''' (or "downsampling") is the process of reducing an image to a smaller size. It is a type of [[image scaling]], usually used to alter the appearance of an image or reduce the quantity of information required to store an image.

'''Subsampling''' or '''sub-sampling''' may refer to:

==Methods of Subsampling==

* [[Sampling (statistics)]]

* [[Replication (statistics)]]

Two commonly used methods of subsampling are ''replacement'' and ''interpolation''. Replacement selects a single pixel from a group and uses it to represent the entire group. Interpolation uses a statistical sample (such as the mean) to create a new representation of the entire group.

* [[Downsampling]] in signal processing

==See Also==

* [[Resampling]]

* [[Chroma subsampling]]

* [[SamplingSub-sampling (signal processingchemistry)]]

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