In this paper, a fuzzy matching algorithm for recognizing primitives in hand-drawn graphical symbols is presented. By primitives we mean the frequently used sub-graphic units in the certain graphic symbols set. The recognition process is performed through local and global relation calculation, fuzzy rules are adopted in the process to describe the relation between basic geometric lines. As a middle layer of a hand-drawn graphic symbol recognition system, primitives recognition can greatly reduce the searching space of graphic symbols matching and improve the performance of whole system.
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