为解决自寻的电视导引过程中目标的尺度和旋转变化问题,将尺度不变特征应用到电视制导算法中。采用了一种计算更为简单的改进尺度不变特征描述算子,通过极坐标将算子中的旋转变换改为简单的平移变换。针对地面目标的远距离高精度导引问题,设计了一种多模板更换的匹配策略。前几幅模板用于粗略定位目标,后续模板用于精选目标瞄准点。仿真实验表明,该算法能够满足远距离高精度的电视制导要求,实时性好。

To solve the problem of target scaling and rotation during television homing seeking for ground targets,scale-invariant features are applied in the guiding algorithm. Modified scale-invariant feature descriptor is employed in this algorithm,in which polar coordinates is used to transform rotation computing into easy translation. A multi-model matching scheme is designed to achieve the long-distance and high-precision guiding. This method uses different model on different stage of the guiding process. The anterior models are used in coarse positioning of the target,and the subsequent models are used to label the refined attacking point. Experiments show that this algorithm could accomplish this guiding task perfectly,while achieving near real-time performance.