A Minimum Risk Recognition Method of Ballistic Targets with Rejection Options

doi:10.7652/xjtuxb201804019

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A Minimum Risk Recognition Method of Ballistic Targets with Rejection Options

更新时间：2025-07-09

- A Minimum Risk Recognition Method of Ballistic Targets with Rejection Options
- Vol. 52, Issue 4, Pages: 132-138(2018)
- 作者机构：
  
  空军工程大学防空反导学院,西安,710051
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201804019
  CLC： TP391
- Online First：10 April 2018，
  
  Published：2018
- 稿件说明：
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A Minimum Risk Recognition Method of Ballistic Targets with Rejection Options[J]. 2018, 52(4): 132-138.
DOI：

A Minimum Risk Recognition Method of Ballistic Targets with Rejection Options[J]. 2018, 52(4): 132-138. DOI： 10.7652/xjtuxb201804019.

摘要

针对弹道目标识别过程中误分类代价的不对称性

提出了一种引入拒识的最小风险弹道目标识别方法。该方法借助受试者工作特征(ROC)曲线

从概率分布的角度分析了真阳性率、虚警率与决策阈值之间的关系; 定义了代价敏感模型及引入拒识代价的模型的代价损失函数

推导了最小化分类代价所需满足的条件

结合ROC曲线的切线斜率

确定了最优拒识阈值

并利用两类目标的高分辨距离像(HRRP)数据验证了方法的有效性。实验结果表明:该方法能够唯一确定使代价最小的拒识阈值

克服了传统方法由于依赖于类先验概率及训练结果而造成的随机性和不确定性的缺点

提高了可靠性和稳定性

具有理论和实际应用价值。

Abstract

A new method to minimize the recognition risk of ballistic targets with rejection options is proposed to focus on the unsymmetry problem of different misclassification costs in ballistic targets recognition. The receiver operating characteristic(ROC)curve is applied to analyze the relationship between the true positive rate and false alarm rate and the decision threshold from the perspective of probability distribution. Loss functions of a cost-sensitive model and a cost-sensitive model with rejection options are defined

and the condition to be met for minimizing the loss function is derived. The optimal rejection thresholds are obtained via the tangent of ROC curve. The proposed method is validated on high resolution range profile(HRRP)datasets of two kinds of targets. The results show that the proposed method obtains the unique optimal rejection threshold

and minimizes the classification risk as well. The weaknesses of traditional methods are overcome and the reliability and stability are improved. It shows that the method has good values in theoretical analysis and realistic applications.

关键词

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references

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