{{for|the signal processing technique|Downsampling}}
{{distinguish|Undersampling}}
{{for|the technique used in analytical chemistry|sub-sampling}}
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.
