运用形状分析理论，提取了基于区域和基于轮廓的平面赤足迹形状特征参数。

Morphological features based on regions and contour curves of planar footprint are extracted by utilizing image analysis theory.

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提出了基于BAG结构的轮廓提取算法，并在此基础上又提出了提取字符形状特征(改进方向码)的方法。

The algorithm to extract the outline based on the BAG structure was proposed. On the basis of these, the shape feature (the improved direction code) were obtained.

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针对组合形状零件几何尺寸测量中的关键问题—轮廓识别，提出了一种基于弧长的轮廓特征点提取的方法。

An approach to extract feature points on the boundary based on length of arc is proposed in view of the key problem of measuring composite-shape parts.

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