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revision 1.65 by tjl, Sat Mar 29 13:45:16 2003 UTC revision 1.66 by jvk, Sat Mar 29 14:30:48 2003 UTC
# Line 1146  visually, making the user interface more Line 1146  visually, making the user interface more
1146  %with the document content,  %with the document content,
1147  %the textures of any two important files are similar only by chance.  %the textures of any two important files are similar only by chance.
1148    
1149  We have chosen the texture coordinate mappings for different texture units  %The background textures should be be recognizable at different scales.
1150  so that the resulting textures have  Although texture perception is scale-independent to some extent,
1151    the limited resolution of the display and certain spatial interactions
1152    in color perception limit the scale at which
1153    different features can be pre-attentively perceived.
1154    %XXXrefs?
1155    Therefore,
1156    we have chosen the texture coordinate mappings for different texture units
1157    so that the resulting textures have separate
1158  distinguishing features on both small and large scales.  distinguishing features on both small and large scales.
1159  However,  
1160  we have not tried to attain infinite zoomability\cite{furnas00infinity}  We have not tried to attain infinite zoomability\cite{furnas00infinity}
1161  with the current implementation,  with the current implementation,
1162  but only the more modest goal of zooming within a range  but only the more modest goal of zooming within a range
1163  that would be reasonable for a single PDF document,  that would be reasonable for a single PDF document,
# Line 1446  and to make the ad hoc distributions mor Line 1453  and to make the ad hoc distributions mor
1453  It could also be worthwhile to experiment with other ways  It could also be worthwhile to experiment with other ways
1454  of visualizing identity, such as unique edge shapes.  of visualizing identity, such as unique edge shapes.
1455    
1456    XXX: the effect of zoomability on recognizability
1457    
1458  There have been studies on  There have been studies on
1459  mapping texture appearance to an Euclidian texture space  mapping texture appearance to an Euclidian texture space
1460  (see \cite{gurnsey01texturespace} and the references therein):  (see \cite{gurnsey01texturespace} and the references therein):

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