基于小波分析与帧间交错图像融合算法的电磁泄漏信息还原方法  

EM Information Leakage Reconstruction Method Based on Wavelet Analysis and Interframe Interleaved Image Fusion Algorithm

作　　者：孙宇良 李凯 田平怡 石琴 于三强 杨善勇 刘鑫强 杨光 SUN Yuliang;LI Kai;TIAN Pingyi;SHI Qin;YU Sanqiang;YANG Shanyong;LIU Xinqiang;YANG Guang(Shanxi Key Laboratory of Intelligent Detection Technology&Equipment,Taiyuan 030051,China)

机构地区：[1]智能探测技术与装备山西省重点实验室,太原030051

出　　处：《计算机测量与控制》2025年第3期259-266,共8页Computer Measurement &Control

基　　金：中央引导地方科技发展资金(YDZJSX20231A025,YDZISX2024D032);山西重点研发计划项目(202202010101007);山西省科技成果转化引导专项(202204021301044,202304021301028)。

摘　　要：针对显示器电磁泄漏信号还原出的图像存在模糊的问题,提出了一种基于小波分析与帧间交错图像融合算法融合的电磁泄漏信息还原方法,基于多帧平均去噪法的原理,利用显示器显示图像信息时依赖于不同视频帧周期性重复的特性,通过将连续帧进行像素点的交错叠加来实现图像增强,进而有效减弱环境噪声的影响,同时融合一维小波变换技术,进一步提高了图像重建的质量;实验结果表明,相较于直接进行图像重构,利用小波分析与帧间交错图像融合算法在图像信噪比、对比度、锐度上分别提高了79.7%、15.9%、47.8%,该算法在电磁泄漏信号还原与信号处理领域具有显著的应用价值。Aiming at the issue of blurry images reconstructed from electromagnetic leakage signals on displays,this paper proposes a restoration method for electromagnetic leakage information based on the fusion of wavelet analysis and interframe interleaved image fusion algorithm.Based on the principle of multi-frame average denoising method,utilizing the characteristic of periodic repetition of different video frames when displaying image information on a monitor,image enhancement is achieved by interleaving and superimposing consecutive frames with pixel points,which effectively reduces the influence of environmental noise.Meanwhile,by integrating one-dimensional wavelet transform technology,the quality of image reconstruction is further improved.Experimental results show that,compared with the direct image reconstruction,the wavelet analysis and frequency domain hierarchical image reconstruction improves the image signal-to-noise ratio,contrast ratio and acuteness by 79.7%,15.9%and 47.8%,respectively.The algorithm has significant application value in the fields of electromagnetic leakage signal recovery and signal processing.

关 键 词：电磁泄漏 TEMPEST 液晶显示器(LCD) 信息恢复 Video Graphics Array(VGA) 

分 类 号：TP309.1[自动化与计算机技术—计算机系统结构]