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revision 1.109 by tjl, Mon Mar 31 16:20:20 2003 UTC revision 1.110 by tjl, Mon Mar 31 16:24:22 2003 UTC
# Line 232  a somewhat looser sense\cite{catmull74,\ Line 232  a somewhat looser sense\cite{catmull74,\
232  it refers to mapping 2D arrays of numerical values onto graphics primitives  it refers to mapping 2D arrays of numerical values onto graphics primitives
233  such as polygons or Bezi\'er patches, modifying their rendered appearance  such as polygons or Bezi\'er patches, modifying their rendered appearance
234  in some way (coloring\cite{catmull74}, bump mapping\cite{blinn78bump}, etc.).  in some way (coloring\cite{catmull74}, bump mapping\cite{blinn78bump}, etc.).
   
235  \iftechreport  \iftechreport
236    
237  Due to the price of texturing-capable hardware, most uses  Due to the price of texturing-capable hardware, most uses
238  of texturing until the mid-1990s were in scientific  of texturing until the mid-1990s were in scientific
239  visualization and the entertainment industry.  visualization and the entertainment industry.
# Line 249  is procedural texturing\cite{cook84shade Line 249  is procedural texturing\cite{cook84shade
249  (often called texture  (often called texture
250  shading in that context)\iftechreport\cite{fuchs89pixelplanes,lastra95shading,%  shading in that context)\iftechreport\cite{fuchs89pixelplanes,lastra95shading,%
251  olano98pixelflow,mccool99textureshaders}\fi.  olano98pixelflow,mccool99textureshaders}\fi.
 \fi  
252    
253    \fi
254  %In addition to being drawn by hand or scanned,  %In addition to being drawn by hand or scanned,
255  Textures have been synthesized in several ways: procedurally\cite{perlin-noise-intro},  Textures have been synthesized in several ways: procedurally\cite{perlin-noise-intro},
256  using  using
# Line 275  on pre-attentive Line 275  on pre-attentive
275  \emph{visual texture discrimination}\cite{julesz62visualpattern,bergen91theories},  \emph{visual texture discrimination}\cite{julesz62visualpattern,bergen91theories},
276  the ability of human observers to effortlessly discriminate  the ability of human observers to effortlessly discriminate
277  pairs of certain textures.  pairs of certain textures.
278  Discrimination models can provide insight on the pre-attentive  %Discrimination models can provide insight on the pre-attentive
279  processes underlying visual perception.  %processes underlying visual perception.
   
280  Julesz\cite{julesz81textons} proposed that texture discrimination could be  Julesz\cite{julesz81textons} proposed that texture discrimination could be
281  explained by the densities of textons, fundamental texture elements, such as  explained by the densities of textons, fundamental texture elements, such as
282  elongated blobs, line terminators, and line crossings.  elongated blobs, line terminators, and line crossings.

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