The preprocessing steps include drawing scanning, binary image transforming, line thinning and cure tracing.
预处理包括图纸扫描输入、图象二值化、图象平滑与去噪、线条细化和曲线跟踪。
The paper mainly discusses vectorization based on thinning of line drawing.
论文主要讨论了基于细化的线划图的矢量化方法。
It includes seismogram input by scanner, grey normalization, horizontal line removal, extractions of time marks and start time of earthquake, and intelligent tracking and thinning.
该方法由地震图扫描输入、灰度规一化、水平线消除、时标和起震点提取及智能跟踪与细化等步骤组成。
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