Research On Anti-leakage Processing Technology Of Video Image Information

Due to its structural composition and display characteristics,computer display systems generate a large amount of electromagnetic radiation during the transmission and display of information.These electromagnetic radiation carry a lot of useful information.The radiated electromagnetic waves can be restored to useful information through a series of processing techniques after being received by the antenna or intercepted by the receiver.Video information is essentially formed by the fast playback of one frame and one frame of image.Therefore,based on the theory of electromagnetic radiation and electromagnetic leakage,the paper takes analog image information and digital image information as the research object,and uses electromagnetic information anti-leakage method to process it,and analyzes the time-frequency domain characteristics of images processed by different anti-leakage methods.Based on the image effects before and after the anti-leakage treatment,the comprehensive evaluation index of image quality in the anti-leakage treatment is proposed.Finally,using C++ and SQL statements to realize computer video information electromagnetic leakage suppression simulation software,this software can provide theoretical basis for anti-leakage hardware design.The first part studies the significance and research background of electromagnetic leakage prevention of computer video information display system.Combined with the development trends and research status at home and abroad,the main work of this paper is finally expounded.The second part analyzes the common leakage sources by studying the working principle of the computer display system.Based on this,it is analyzed how to protect the electromagnetic waves leaked from the computer display system.Finally,the protection measures adopted in this paper are TEMPEST technology,that is,the image is processed at the source part of the image information to reduce the electromagnetic radiation of useful information.Several methods for preventing electromagnetic information leakage are presented in this paper.Based on the time-frequency domain characteristics of the image,the time-frequency characteristics of the research object-image information are studied.The third part mainly focuses on the classification research of the anti-leakage processing of the character image information and the non-character image information analyzed in the second chapter.The spectral correlation coefficients are calculated according to the image spectrum of the image before and after the simulation to evaluate the correlation degree of the image spectrum before and after processing.For the fourth chapter,we will lay the groundwork for image quality evaluation and provide materials.The fourth part first analyzes and compares the common image quality evaluation indicators,and analyzes the applicability according to the characteristics of these image evaluation indicators.Finally,SSIM,FSIM and QILV are selected as the image evaluation indicators of this paper.Secondly,the results of anti-leak simulation of the image in Chapter 3 are calculated respectively,and the SSIM,FSIM and QILV indicators are calculated respectively.After comparative analysis,the most suitable image evaluation index is selected.Finally,the selected image evaluation index is combined with the spectral correlation coefficient to give a comprehensive evaluation index in the electromagnetic leakage suppression simulation research of computer video information.The fifth part of the main work is to complete the realization of computer video information electromagnetic leakage suppression simulation software.First,the demand analysis of the software is analyzed.Secondly,the outline design and design flow of the software are given in this paper.Finally,the article shows the function implementation,usage process and precautions of the software.