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<p>A methodology for the interpretation of images of engineering drawings is presented. The approach is based on the combination of schemata describing prototypical drawing constructs with a library of low-level image analysis routines and a set of explicit control rules applied by an LR(1) parser. The resulting system (Anon) integrates bottom-up and top-down processing strategies within a single, flexible framework modeled on the human perceptual cycle. Anon's structure and operation are described and discussed, and examples of its interpretation of real mechanical drawings are shown.</p>
image interpretation; knowledge directed interpretation; bottom-up processing; mechanical engineering drawings; LR(1) parser; top-down processing; human perceptual cycle; Anon's structure; computerised pattern recognition; knowledge engineering; mechanical engineering computing

S. Joseph and T. Pridmore, "Knowledge-Directed Interpretation of Mechanical Engineering Drawings," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 14, no. , pp. 928-940, 1992.
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