Subsampling
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For the signal processing technique, see Downsampling.
For the technique used in analytical chemistry, see 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.
[edit] Methods of Subsampling
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.
