基于自动检焦信号梯度信息的自适应平滑算法研究

近年来随着航空相机技术不断发展,高分辨率相机将成为未来航空相机的发展趋势;但环境的变化会使光学系统的性能发生显著的、随机的变化,因此,欲在恶劣的环境条件下获得最佳分辨率,必须使相机具有很高的检焦精度,然而由于测量元件及电源等的噪声的存在,大大影响了检焦信号精度;基于中值滤波和梯度信息的平滑滤波算法,介绍了一种新的自适应平滑算法,该算法有效地抑制扰动信号,更为真实的突现出峰值信号,从而大大提高了检焦精度;该方法大大减小了随机干扰对检焦结果的影响,提高了检焦精度,从而每次都能获得较为清晰的图像。

Research on self-adaptive Smoothing Algorithm Based on Gradient Information for Auto-Focusing

In modern years following continuous development of photo-reconnaissance aircraft, the long focal and high resolution cameras is a mode being considered that will be applied to photo-reconnaissance aircraft in the future. With the cameras, unexpected changes in performance of optical system have been observed due to changes in the local environment. Therefore, to attain the best optimum resolution under adverse environmental conditions, the cameras must have a much accurate form for check focus. According t...