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.
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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