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根据红外成像导引头截取时序红外图像的特点,提出了一种跟踪红外运动图像序列中目标的稳定特征点,利用成像所得特征部分尺寸得到距离信息的被动测距方法。基于红外图像特征点难以提取的特点,在分析典型飞机红外图像的基础上,采用局部自适应插值算法提高图像分辨率,并对飞机图像及尾焰进行双阈值分割。跟踪过程中选择机头部位作为特征点的提取部位,通过分析导引头投影成像模型得到弹目距离估计量,并根据跟踪成像特点对估计结果做了进一步修正。实验结果证明了该方法的可行性和有效性。
According to the characteristics of infrared imaging seeker interception timing infrared images, a method of tracking the stable feature points of the target in the infrared moving image sequence and obtaining the distance information using the feature size of the imaging is proposed. Based on the characteristic of infrared image feature points difficult to extract, based on the analysis of the typical aircraft infrared images, the local adaptive interpolation algorithm is used to improve the image resolution and the dual-threshold segmentation of the aircraft image and tail flame. In the process of tracking, the nose part is selected as the extraction part of the feature points. The missile projection distance estimation is obtained by analyzing the projection model of the seeker. The estimation results are further corrected according to the tracing features. Experimental results show that the method is feasible and effective.