一种利用FFT自适应阈值处理失真杂散信号的方法

Distortion and spurious signals processing method using FFT adaptive threshold

在图像信号传输过程中,由于传输网络以及各种数模转换设备和数字处理设备的影响,可能会造成失真杂散信号的产生,其随机不确定性将导致某些专业图像检测处理设备工作的异常。文中首先分析了图像失真杂散信号产生的原因及其特征,然后针对此特征提出了一种FFT自适应阈值屏蔽算法,最后利用MATLAB仿真验证了此算法且进行了实际的FPGA实验。

Due to the impact of transmission network, D/A or A/D devices and digital processing equipment in the image signal transmission process, distortion and spurious signals occur, whose random uncertainty leads to the abnormal operation of some professional image detecting and processing device. This paper firstly analyzes the causes and characteristics of the distortion spurious signal, then puts forward a FFT adaptive threshold shielding algorithm according to these characteristics. Finally, the MATLAB simulation analysis verifies the algorithm and a experiment based on FPGA is made.