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revision 1.1.1.1 by benja, Fri Dec 6 15:55:46 2002 UTC revision 1.2 by tjl, Wed Mar 5 10:50:08 2003 UTC
# Line 38  by Unique Background Textures} Line 38  by Unique Background Textures}
38  We show how object identity can be visualized  We show how object identity can be visualized
39  by  by
40  unique background textures  unique background textures
41  procedurally generated from the identity (hashcode) of the document or data item.  procedurally generated from the identity (e.g., hashcode) of the document or data item.
42  Unique backgrounds can assist  
43    XXXWAFFLE Unique backgrounds can assist
44  user orientation  user orientation
45  when browsing a set of objects with  when browsing a set of objects with
46  similar overall appearance,  similar overall appearance,
47  especially in focus+context views.  especially in focus+context views.
48    
49  %Unique backgrounds could be useful for assisting user orientation  %Unique backgrounds could be useful for assisting user orientation
50  %in several different user interfaces; our primary application  %in several different user interfaces; our primary application
51  %is navigating hyperstructures using Focus+Context views.  %is navigating hyperstructures using Focus+Context views.
# Line 69  on the NV10 and NV25 architectures, and Line 71  on the NV10 and NV25 architectures, and
71  show an example user interface for browsing linked PDF documents  show an example user interface for browsing linked PDF documents
72  in a focus+context view using unique backgrounds.  in a focus+context view using unique backgrounds.
73    
74    Text readability is a major concern for using such backgrounds,
75    and we discuss a method for enhancing readability by unnoticeably
76    bleaching the background around text..
77    
78  % The implementation works by combining a small set of basis textures  % The implementation works by combining a small set of basis textures
79  % and perceptually chosen colors  % and perceptually chosen colors
80  % on the GPU.  % on the GPU.
# Line 113  Identity, focus+context, fisheye, proced Line 119  Identity, focus+context, fisheye, proced
119  little passages, all alike''\cite{zork}.  little passages, all alike''\cite{zork}.
120  It is easy to become disoriented and lost in an environment  It is easy to become disoriented and lost in an environment
121  where different locations  where different locations
122  are very similar.  have similar appearances.
123  % The same applies to focus+context views of  % The same applies to focus+context views of
124  % sets of objects with a similar overall appearance.  % sets of objects with a similar overall appearance.
125    
126  The motivation for this article comes from the desire  %
127  to show,  % The motivation for this article comes from
128  in a focus+context view,  % the desire
129  bidirectional intertextual links between specific  % to show,
130  regions of documents\cite{ted-xanalogical-structure-needed}.  % in a focus+context view,
131  Only a part of the text of the target document  % bidirectional intertextual links between specific
132  can be shown legibly, and to properly display  % regions of documents\cite{ted-xanalogical-structure-needed}.
133  the structure, this should be the region  % Only a part of the text of the target document
134  the link points to.  % can be shown legibly, and to properly display
135    % the structure, this should be the region
136  However, the target document is most likely not recognizable based  % the link points to.
137  on just the fragment, since most documents look similar.  %
138  This could be alleviated by showing the header of the target  % However, the target document is most likely not recognizable based
139  document as well as the target fragment, but this  % on just the fragment, since most documents look similar.
140  is also difficult to recognize at a glance.  % This could be alleviated by showing the header of the target
141    % document as well as the target fragment, but this
142    % is also difficult to recognize at a glance.
143    
144  % forces the user  % forces the user
145  % to read the header.  % to read the header.
# Line 169  any {\em fragment} of the item, instead Line 177  any {\em fragment} of the item, instead
177  In the following sections,  In the following sections,
178  we first review related work on texturing,  we first review related work on texturing,
179  Focus+Context views, and data identity.  Focus+Context views, and data identity.
180    Next, we discuss the motivating example for this work:
181    a specific (xupdf XXX) focus+context
182    user interface to a hypertext structure.
183  Then, we formulate general principles for designing  Then, we formulate general principles for designing
184  recognizable backgrounds and present a hardware-accelerated implementation.  recognizable backgrounds and present a hardware-accelerated implementation.
185    Following this, we discuss enhancing text readability on such backgrounds
186    and practical experiences.
187  Finally, we show an example application of unique backgrounds  Finally, we show an example application of unique backgrounds
188  for browsing linked PDF documents in a focus+context view.  for browsing linked PDF documents in a focus+context view.
189    
# Line 317  URN-5\cite{fallenstein02urn5}. Line 330  URN-5\cite{fallenstein02urn5}.
330  % use the information to advantage; likewise, developing such interfaces  % use the information to advantage; likewise, developing such interfaces
331  % is next to useless without having the backend functionality.  % is next to useless without having the backend functionality.
332    
333    \section{The XXX xupdf user interface --- the motivation for unique backgrounds}
334    
335  \section{Unique Background Textures}  \section{Unique Background Textures}
336    
# Line 891  if the gamma is correct but the textures Line 905  if the gamma is correct but the textures
905  }  }
906  \end{figure*}  \end{figure*}
907    
908    \section{Text readability}
909    
910    The most commonly asked question about this work concerns
911    text readability. We address this question in two different ways.
912    
913    \subsection{Easy zooming}
914    
915    \subsection{Enhancing}
916    
917    XXX
918    
919    We have bee
920    
921    Related to framing the text with light colors, ...
922    
923    The bleaching is unnoticeable and works well because
924    we start from a fairly light background (>80 XXX).
925    On a darker background, this approach would probably look silly.
926    
927    \section{Experiences, evaluation}
928    
929  \section{Software availability}  \section{Software availability}
930    
931  An implementation of the unique backgrounds is available at  An implementation of the unique backgrounds is available at

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