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, |
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): |