Filter

Filter

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Filter may refer to:

1 Chemistry, engineering and materials
2 Optics and photography
3 Signal processing
4 Computing
5 Philosophy
6 Other
7 Proper name
8 See also

Chemistry, engineering and materials

In chemistry, engineering, or household usage, a device to separate mixtures. See:

Optics and photography

In optics and photography, a device to remove or block certain wavelengths (colors) of light. See:

Signal processing

In signal-processing applications such as telecommunications and music, an electronic or mechanical device, or mathematical algorithm, to modify the harmonic content of signals. See:

electronic filter
audio filter
line filter
See filtering problem (stochastic processes) for the mathematical formalism.

Computing

In computing:

filter (higher-order function)
A program to process a data stream:
BPF filter expression used in the qualification of network data

Philosophy

Category-based filtering of perception — according to (objectivist interpretations of) Kant
interpretive filtering through concepts according to existentialism

Other

In mathematics, a certain kind of subset of a partially ordered set. See
- filter (mathematics).
In psychology, a type of learning blockage. See
- affective filter.
In transportation, filtering forward, a practice that cyclists use to pass slow or stopped congested traffic.
An aquarium filter.

Proper name

Filter (band), an industrial rock band
Filter (television), a show on the G4 channel:
Filter (magazine), an off-beat indie music magazine
Helicon Filter, a raster graphics editor