摘要
Abstract
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.关键词
图像失真/失真杂散信号/FFT/自适应阈值/随机性Key words
image distortion/distortion and spurious signals/FFT/adaptive threshold/randomness分类
信息技术与安全科学
