基于模糊累积函数的航迹起始问题研究

为提取杂波环境下直线航迹,提出了使用模糊累积函数进行Hough变换的方法.考虑到雷达误差对累积函数的影响,该方法以模糊函数的隶属度为累积对象,在参数空间中进行峰值的累积,使累积函数的峰值更加明显.详细描述了航迹起始的算法,并采用衰减因子保证累积函数的时效性.为验证算法,设定了杂波环境下的直线航迹,对各种雷达误差取值下的参数空间累积效果进行了仿真.仿真表明,以累积峰值和峰值显著比为衡量指标,模糊累积法能提高直线航迹检测的准确性,从而减少候选航迹的数量,减轻后续航迹验证的计算量.

Track initialization based on fuzzy accumulation function

To extract line tracks in clutter environment,modified Hough transformation method using fuzzy accumulation function is introduced.The affection of radar error to accumulation function is concerned in this method,which takes the membership degree of fuzzy logic function as the accumulation object to form the peaks in the parameter space.The peaks made from new accumulation function are sharper.Details of algorithm about track initialization are described,which makes use of decay coefficient to keep the real-time property of accumulation function.To validate the algorithm,simulations are done for line tracks in clutter environment based on versatile radar error parameters.Through simulations,the increasing accuracy of line tracks extraction by fuzzy accumulation method is validated,which will decrease the number of candidate tracks and releases the burden of consequent track validation procedure.