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In Proceedings IEEE International Conference on Computer Vision 2001 We present in this paper the design of an interactive tool for select
 

Summary: In Proceedings IEEE International Conference on Computer Vision 2001
Abstract
We present in this paper the design of an interactive tool for select­
ing objects using simple freehand sketches. The objective is to
extract object boundaries precisely while requiring little skill and
time from the user. The tool proposed achieves this objective by
integrating user input and image computation in a two­phase algo­
rithm. In the first phase, the input sketch is used along with a
coarse global segmentation of the image to derive an initial selec­
tion and a triangulation of the region around the boundary. The
triangles are used to formulate subproblems of local finer­grained
segmentation and selection. Each of the subproblems is processed
independently in the second phase, where a linear approximation
of the local boundary as well as a local, finer­grained segmenta­
tion are computed. The approximate boundary is then used with
the local segmentation to compute a final selection, represented
with an alpha channel to fully capture diffused object boundaries.
Experimental results show that the tool allows very simple sketches
to be used to select objects with complex boundaries. Therefore,
the tool has immediate applications in graphics systems for image

  

Source: Ahuja, Narendra - Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign

 

Collections: Computer Technologies and Information Sciences; Engineering