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Title: Dimension recognition and geometry reconstruction in vectorization of engineering drawings
Authors: Su, Feng
Song, Jiqiang
Tai, Chiew-Lan
Cai, Shijie
Keywords: engineering drawings
dimension recognition
Issue Date: Dec-2001
Citation: Proceedings IEEE Conference on Computer Vision and Pattern Recognition, Hawaii, Dec 11-13, 2001, IEEE Computer Society, Los Alamitos, CA, 2001, pp. 710-716
Abstract: This paper presents a novel approach for recognizing and interpreting dimensions in engineering drawings. It starts by detecting potential dimension frames, each comprising only the line and text components of a dimension, then verifies them by detecting the dimension symbols. By removing the prerequisite of symbol recognition from detection of dimension sets, our method is capable of handling low quality drawings. We also propose a reconstruction algorithm for rebuilding the drawing entities based on the recognized dimension annotations. A coordinate grid structure is introduced to represent and analyze two-dimensional spatial constraints between entities: this simplifies and unifies the process of rectifying deviations of entity dimensions induced during scanning and vectorization.
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