Abstract:
This paper is primarily devoted to an algorithm for detecting
dimension sets in engineering drawings that are drawn
to ISO drafting standards. Our approach joins those starting
with detection of dimension text while most methods
are started with the detection of arrowheads. First, we detect
among the segments and arcs resulting from the vectorization
process those that fulfill some location constraints.
A number of segments and arcs are chosen to be candidate
parts of dimension lines according to the position and
the geometry of their presumed witness lines. We establish
the link between the candidates and the detected primitives
which are in correspondence with text blocks. Complete
dimension lines are found using tracking and fusion processes.
Arrowheads are then located thanks to the position
of witness and dimension lines. Experimental results are
presented.