A novel method for spatial relation extraction based
quadtree has been present. The method is applicable
for remotely sensed image interpretation.
The main contributions of this paper are; (1)
representing a hierarchical structure of quadtrees,
which is composed of quadtree segmentation quadtree
, homogeneous region quadtree and spatial relation
quadtree. (2) describing a quadtree structure called
binding that contains three parts, location code , region
number and attribute value. (3) introducing the
notions of control quadtree, feature quadtree, feature
node and feature line quadtree into the spatial relation
extraction.
In addition, A comparetively normalized way of
repre senting image and interpreting image based on
quadtree are described in this paper. It can exclude
the ambiguity of spatial relation extraction and
interpretation even when some objects spectrum are
the of
segmentation and interpretation errors involve edges
very approximate. Because problems
and inperfect interpretation etc.in the low — level
phase , which are difficult to be detected in the high —
562
level phase.some interpretation errors can still be
found from results . We have tried to solve them by
repeating some proper steps to revise the errors under
current best interpretation based on DGs. But the
further improvement of this method is being done by
authors.
6. ACKNOWLEDGEMENT
This paper was sponsored by the National Natural
Science Foundation of China .This support is
gratefully acknowledged.
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