该方法通过提取曲线的相对不变特征量，构建数据结构，细致地处理匹配过程的细节，对轮廓曲线的部分匹配有着较为满意的匹配效果。
The result of this method is content to contour line matching by building variant feature quality, constructing data structure, dealing with matching process's detail.
提取用于模式识别的不变矩特征量在光学上始终是一个有待进一步研究的问题。
Extraction of invariant moments used for pattern recognition is a subject in optics to be further studied.
分析了舰船目标的几何特征和不变特征，为满足实时性要求，使用一组统一的相对矩来计算特征量。
Geometry character and invariant character of ship target is analyzed and a united relative invariant moment is used to calculate the feature to meet real-time requirements.
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