Method for vectorizing line-structured engineering drawings based on window features extraction

Xiangyang Wang; Xinggang Lin; Youshou Wu

doi:10.1117/12.157870

22 October 1993 Method for vectorizing line-structured engineering drawings based on window features extraction

Xiangyang Wang, Xinggang Lin, Youshou Wu

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157870
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

This paper presents a method for vectorizing line-structured engineering drawings based on window features extraction. A line-structured engineering drawing is composed of straight lines and curves (they may have different widths) as well as their ends, corners, and crosses (we call them feature points). In the paper we use 2-dimension black-run-length to trace and separate different lines. We present feature point extracting criteria to detect feature point. When any feature point is detected a small rectangle window is opened around the feature point. After an adaptive window enlarge algorithm is applied, a proper size and position of the window which is named as Window Feature is obtained. In this way, we can see whether it is really a feature point (end, corner, cross) or just a noise. We define 40 window features and with these window features, we can process and vectorize all the complicated cross points in mechanical drawings. Finally we give some experimental samples about vectorizing mechanical drawings.

Citation Download Citation

Xiangyang Wang, Xinggang Lin, and Youshou Wu "Method for vectorizing line-structured engineering drawings based on window features extraction", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157870

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KEYWORDS

Feature extraction

Fourier transforms

Chromium

Detection and tracking algorithms

Chlorine

Image processing

Raster graphics

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