基于类别方差的CCD缠度非接触测量研究

在火炮身管静态参数的检测中，膛线诸参数的识别和提取是一个重要的部分。文中对非接触缠度测量原理以及测量过程做了较为细致的分析；在对大量内膛图像分析与统计的基础上。提出基于类别方差的缠角测量算法。实测验证表明，该算法满足测量精度指标，具有通用性。最后，对系统以及实验结果做了不确定度分析。

Study of Non-contact Measurement of the Twist Pitch of Rifling Based on Class Variance

In the process of static parameters detection of artillery pipe, it is very important for the parameters of rifling to be recognized and extracted. The paper analyzes in detail the measuring principle, and also introduces the measuring process of the system. An algorithm is also developed based on class variance after a great number of cannon barrel images are analyzed. The verification in actual measurement shows that the algorithm satisfies the measurement precision indices and is in common use. Finally, analysis of the system and experiment result for uncertainty is given.