/[gzz]/manuscripts/Paper/paper.tex
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revision 1.92 by tjl, Mon Mar 31 14:10:42 2003 UTC revision 1.93 by tjl, Mon Mar 31 14:25:57 2003 UTC
# Line 1101  textures selected. Line 1101  textures selected.
1101  %the output values can be scaled up only once per each general  %the output values can be scaled up only once per each general
1102  %combiner stage by at most 4.  %combiner stage by at most 4.
1103    
 \begin{figure*}  
 \centering  
 \ifpics  
 \includegraphics[height=10cm]{multipaper.ps}  
 \fi  
 \caption{  
 \label{fig-examples}  
 A number of unique backgrounds generated by our system.  
 This view can be rendered, without pre-rendering the textures,  
 in 20 ms on a GeForce4 Ti 4200 in a 1024x768 window (fill-rate/bandwidth limited).  
 }  
 \end{figure*}  
   
1104  \begin{figure}  \begin{figure}
1105  \centering  \centering
1106  \ifpics  \ifpics
# Line 1184  if the gamma is correct but the textures Line 1171  if the gamma is correct but the textures
1171  \end{figure*}  \end{figure*}
1172    
1173  \section{Experiences, evaluation}  \section{Experiences, evaluation}
1174  In the following, we evaluate the implications and tradeoffs  
1175  of different  %In the following, we evaluate the implications and tradeoffs
1176  aspects in the use of unique backround textures.    %of different
1177    %aspects in the use of unique backround textures.  
1178    
1179  \subsection{Overall appearance of the resulting textures}  \subsection{Overall appearance of the resulting textures}
1180    
1181    As seen in Fig.~\ref{fig-examples}, the overall appearance of the textures
1182    is somewhat natural and the textures clearly do have unique distinguishing
1183    features.
1184    
1185    \begin{figure*}
1186    \centering
1187    \ifpics
1188    \includegraphics[height=10cm]{multipaper.ps}
1189    \fi
1190    \caption{
1191    \label{fig-examples}
1192    A number of unique backgrounds generated by our system.
1193    This view can be rendered, without pre-rendering the textures,
1194    in 20 ms on a GeForce4 Ti 4200 in a 1024x768 window (fill-rate/bandwidth limited).
1195    }
1196    \end{figure*}
1197    
1198    The can be zoomed quite well,
1199    even though
1200    we have not tried to attain infinite zoomability\cite{furnas00infinity}
1201    with the current implementation,
1202    but only the more modest goal of zooming within a range
1203    that would be reasonable for a single PDF document,
1204    i.e., approximately 20-fold
1205    difference between mininum and maximum zoom.
1206    
1207  %The background textures should be be recognizable at different scales.  %The background textures should be be recognizable at different scales.
1208  Although texture perception is scale-independent to some extent,  Although texture perception is scale-independent to some extent,
1209  the display resolution and certain spatial interactions  the display resolution and certain spatial interactions
# Line 1201  we have chosen the texture coordinate ma Line 1215  we have chosen the texture coordinate ma
1215  so that the resulting textures have separate  so that the resulting textures have separate
1216  distinguishing features on both small and large scales.  distinguishing features on both small and large scales.
1217    
 We have not tried to attain infinite zoomability\cite{furnas00infinity}  
 with the current implementation,  
 but only the more modest goal of zooming within a range  
 that would be reasonable for a single PDF document,  
 i.e., approximately 10-fold  
 difference between mininum and maximum zoom.  
1218  % This is in line with our  % This is in line with our
1219  % intended use, since it would be unreasonable  % intended use, since it would be unreasonable
1220  % to expect a texture to be recognizable  % to expect a texture to be recognizable
# Line 1215  It could be possible\cite{furnas00infini Line 1223  It could be possible\cite{furnas00infini
1223  to make the unique background look similar  to make the unique background look similar
1224  at different scales, but  at different scales, but
1225  this would remove the use of the texture as a cue of scale.  this would remove the use of the texture as a cue of scale.
1226    
1227  Our  Our
1228  nonlinear use of the register combiners  nonlinear use of the register combiners
1229  does have some ill effects when zooming the texture out  does have some ill effects when zooming the texture out

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