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texture
<graphics> A measure of the variation of the intensity of a
surface, quantifying properties such as smoothness, coarseness
and regularity. It's often used as a region descriptor in
image analysis and computer vision.
The three principal approaches used to describe texture are
statistical, structural and spectral. Statistical techniques
characterise texture by the statistical properties of the grey
levels of the points comprising a surface. Typically, these
properties are computed from the grey level histogram or
grey level cooccurrence matrix of the surface.
Structural techniques characterise texture as being composed
of simple primitives called "texels" (texture elements), that
are regularly arranged on a surface according to some rules.
These rules are formally defined by grammars of various
types.
Spectral techiques are based on properties of the Fourier
spectrum and describe global periodicity of the grey levels of
a surface by identifying high energy peaks in the spectrum.
(1995-05-11)
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Nearby terms:
text segment « Text To Speech « Textual User Interface « texture » tf » TFDL » TFT
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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