Feature vector

Feature vector

In pattern recognition and machine learning, a feature vector is an n-dimensional vector of numerical features that represent some object. Many algorithms in machine learning require a numerical representation of objects, since such representations facilitate processing andstatistical analysis. When representing images, the feature values might correspond to the pixels of an image, when representing texts perhaps to term occurrence frequencies.

The vector space associated with these vectors is often called the "feature space". In order to reduce the dimensionality of the feature space, a number of dimensionality reduction techniques can be employed.

See also

* Feature extraction
* Feature selection
* Dimensionality reduction


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Vector synthesis — is a type of audio synthesis introduced by Sequential Circuits in the Prophet VS synthesizer during 1986. The concept was subsequently used by Yamaha in the SY22/TG33 and similar instruments and by Korg in the Wavestation. Vector synthesis… …   Wikipedia

  • Feature (computer vision) — In computer vision and image processing the concept of feature is used to denote a piece of information which is relevant for solving the computational task related to a certain application. More specifically, features can refer to* the result of …   Wikipedia

  • Feature detection (computer vision) — In computer vision and image processing the concept of feature detection refers to methods that aim at computing abstractions of image information and making local decisions at every image point whether there is an image feature of a given type… …   Wikipedia

  • Vector autoregression — (VAR) is an econometric model used to capture the evolution and the interdependencies between multiple time series, generalizing the univariate AR models. All the variables in a VAR are treated symmetrically by including for each variable an… …   Wikipedia

  • Vector Arena — Infobox Stadium stadium name = Vector Arena nickname = Multi Purpose Venue location = Auckland, New Zealand broke ground = opened = 2007 closed = demolished = owner = QPAM operator = surface = construction cost = 80 million architect = former… …   Wikipedia

  • Vector bundle — The Möbius strip is a line bundle over the 1 sphere S1. Locally around every point in S1, it looks like U × R, but the total bundle is different from S1 × R (which is a cylinder instead). In mathematics, a vector bundle is a… …   Wikipedia

  • Vector Sigma — N/A Function Mega Computer Series Transformers: Generation 1 Transformers: The Headmasters Beast Machines …   Wikipedia

  • Vector soliton — Among all the soliton considered, the optical soliton draws the most attention as it is possible to generate ultrafast pulses and has wider application. optical soliton can be classified as two groups:temporal soliton and spatial soliton.however …   Wikipedia

  • Vector Architect — Infobox Software name = Vector Architect caption = Vector Architect Screenshot developer = Owl Island Software latest release version = 2.0.1 latest release date = release date and age|2008|06|01 language = English operating system = Microsoft… …   Wikipedia

  • Vector Map — The Vector Map (VMAP), also called Vector Smart Map, is a vector based collection of Geographic information system (GIS) data about Earth at various levels of detail. Level 0 (low resolution) coverage is global and entirely in the public domain.… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”