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revision 1.52 by tjl, Fri Nov 22 09:06:42 2002 UTC revision 1.53 by tjl, Fri Nov 22 09:31:27 2002 UTC
# Line 47  documents, as per Zipf's law. Line 47  documents, as per Zipf's law.
47  In Focus+Context views, the textures can act as visual cues in the context  In Focus+Context views, the textures can act as visual cues in the context
48  (information foraging).  (information foraging).
49    
50  We have designed a hardware-accelerated implementation of unique textures  We motivate general rules about designing such textures through
51  using a rough, qualitative model of visual perception.  a rough, qualitative model of visual perception: to be recognizable,
52    the texture should produce a random feature vector on the cortex
53    {\bf after} visual feature extraction.
54    
55    We have designed a hardware-accelerated implementation on the NV10 and NV20
56    of unique textures.
57  The implementation works by combining a small set of basis textures  The implementation works by combining a small set of basis textures
58    and perceptually chosen colors
59  on the GPU.  on the GPU.
60    
61  READABILITY  We show an example user interface for browsing linked PDF documents
62    in a focus+context view using unique textures.
63    
64    % READABILITY
65    
66  % - saving bits  % - saving bits
67  % - colors decoupled  % - colors decoupled
# Line 60  READABILITY Line 69  READABILITY
69  % - repeating non-repeating  % - repeating non-repeating
70  % - render-to-texture  % - render-to-texture
71    
 % Unique textures can be implemented by combining a small set of basis  
 % textures on the GPU. We discuss our implementation on the NV10 and NV20  
 % architectures.  
   
72  % - example: f+c PDF  % - example: f+c PDF
73  %- EFFICIENT\\  %- EFFICIENT\\
74  %- Perceptron model justification\\  %- Perceptron model justification\\
# Line 198  olano98pixelflow,mccool99textureshaders} Line 203  olano98pixelflow,mccool99textureshaders}
203    
204  \section{Unique Textures}  \section{Unique Textures}
205    
206    Features orthogonal to human perception (e.g.~color, direction of fastest luminance change)
207    should be independently random, and features not orthogonal (... and ...)...
208    
209  ...  ...
210  When the view is focused on one part of a document,  When the view is focused on one part of a document,
211  context is provided by the fragments of documents, which the  context is provided by the fragments of documents, which the

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