捷联图像导引系统传感器稳像方法

Sensor Image Stabilization of Strapdown Image Homing System

摘要:

以消除捷联图像导引系统视频抖动为出发点，深入研究了捷联图像导引系统传感器稳像方法。通过分析惯性坐标系与弹体坐标系之间的转换关系，推导出了弹体姿态变化与探测器成像平面上像素点坐标变化之间的映射关系，利用该映射关系并结合陀螺提供的弹体实时姿态信息建立起当前帧中像素点坐标在抖动前后的对应关系，再通过数字图像处理中常用的重采样技术和插值技术实现对当前帧的运动补偿，完成了传感器实时稳像方案的设计。实验结果表明，该稳像方法具有很好的实时性和较高的稳像精度。

Abstract:

In order to eliminate the video jitter in image guidance system, in-depth study was performed on the sensor image stabilization approach of strapdown image homing system. By analyzing the transformation between inertial coordinate system and the detection coordinate, the mapping relationship between the missile body posture changes and the pixel coordinates changes in the imaging plane was derived out, and the mapping relationship in combination with real-time gyroscope sensor posture information was used to establish the relations of pixel coordinates corresponding relations between before and after the shake in current frame, then using resampling technique and interpolation technique in digital image processing to implement motion compensation in current frame, finally the design of real-time image stabilization approach was completed. Experimental results show that the sensor image stabilization approach presents good real-time performance and high image stabilization precision.