texture
    n 1: the feel of a surface or a fabric; "the wall had a smooth
         texture"
    2: the essential quality of something; "the texture of
       Neapolitan life"
    3: the musical pattern created by parts being played or sung
       together; "then another melodic line is added to the texture"
    4: the characteristic appearance of a surface having a tactile
       quality
    5: the physical composition of something (especially with
       respect to the size and shape of the small constituents of a
       substance); "breadfruit has the same texture as bread"; "sand
       of a fine grain"; "fish with a delicate flavor and texture";
       "a stone of coarse grain" [syn: texture, grain]

Texture \Tex"ture\, n. [L. textura, fr. texere, textum, to
   weave: cf. F. texture. See Text.]
   1. The act or art of weaving. [R.] --Sir T. Browne.
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   2. That which woven; a woven fabric; a web. --Milton.
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            Others, apart far in the grassy dale,
            Or roughening waste, their humble texture weave.
                                                  --Thomson.
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   3. The disposition or connection of threads, filaments, or
      other slender bodies, interwoven; as, the texture of cloth
      or of a spider's web.
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   4. The disposition of the several parts of any body in
      connection with each other, or the manner in which the
      constituent parts are united; structure; as, the texture
      of earthy substances or minerals; the texture of a plant
      or a bone; the texture of paper; a loose or compact
      texture.
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   5. (Biol.) A tissue. See Tissue.
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Texture \Tex"ture\, v. t. [imp. & p. p. Textured; p. pr. & vb.
   n. Texturing.]
   To form a texture of or with; to interweave. [R.]
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texture

    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)