[Gzz-commits] manuscripts/xupdf article.rst

[Janne V. Kujala]

CVSROOT:        /cvsroot/gzz
Module name:    manuscripts
Changes by:     Janne V. Kujala <address@hidden>        03/01/27 04:05:44

Modified files:
        xupdf          : article.rst 

Log message:
        paper

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/manuscripts/xupdf/article.rst.diff?tr1=1.26&tr2=1.27&r1=text&r2=text

Patches:
Index: manuscripts/xupdf/article.rst
diff -u manuscripts/xupdf/article.rst:1.26 manuscripts/xupdf/article.rst:1.27
--- manuscripts/xupdf/article.rst:1.26  Mon Jan 27 02:25:19 2003
+++ manuscripts/xupdf/article.rst       Mon Jan 27 04:05:44 2003
@@ -317,16 +317,26 @@
 Paper
 -----
 
-A unique background texture is chosen for each PDF file
-using the identity as a seed. 
+A unique background texture consisting of random shapes 
+and colors is chosen for each document using the identity as a seed. 
+The background textures help the user perceive the identity
+of the most familiar documents at a glance, 
+even when only fragments are shown.
+
+The distribution of the textures is designed to be maximally 
+diverse and recognizable using a rough, qualitative model 
+of visual perception.
+For example, backgrounds with uniformly random pixels would all
+look the same, because the pixels are not perceived individually,
+but shapes and overall colors can be independently random to 
+maximize diversity.
+Making the backgrounds repeating creates well-defined patterns
+and improves recognizability when fragments are shown.
 
 - hw accelerated impl (libpaper)
-- perception model
 - readability
-- helps especially when fragments of documents are shown
 - preattentive
 
-JVK
 
 Implementation on the Gzz platform
 ==================================