IEEE Trans Pattern Anal Mach Intell - A Co-Prime Blur Scheme for Data Security in Video Surveillance.

Tópicos

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Resumo

This paper presents a novel Coprime Blurred Pair (CBP) model to improve data security in camera surveillance. While most previous approaches have focused on completely encrypting the video stream, we introduce a spatial encryption scheme by strategically blurring the image/video contents. Specifically, we form a public stream and a private stream by blurring the original video video data using two different kernels. Each blurred stream will provide user with lower clearance less access to personally identifiable details while still allowing behavior to be monitored. If behavior is recognized as suspicious, a supervisor can use both streams to deblur the contents. Our approach is based on a new CBP theory where the two kernels are coprime when mapped to bivariate polynomials in the $z$ domain. We show that coprimality can be derived in terms of the rank of B\'{e}zout matrix formed by sampled polynomials and we present an efficient algorithm to factor the B\'{e}zout matrix for recovering the latent image. To make our solution practical, we implement our decryption scheme on the graphics processing unit (GPU) to achieve real-time performance. Extensive experiments demonstrate that our new scheme can effectively protect sensitive identity information in surveillance videos and faithfully reconstruct the unblurred video stream when both CBP sequences are available.

Resumo Limpo

paper present novel coprim blur pair cbp model improv data secur camera surveil previous approach focus complet encrypt video stream introduc spatial encrypt scheme strateg blur imagevideo content specif form public stream privat stream blur origin video video data use two differ kernel blur stream will provid user lower clearanc less access person identifi detail still allow behavior monitor behavior recogn suspici supervisor can use stream deblur content approach base new cbp theori two kernel coprim map bivari polynomi z domain show coprim can deriv term rank bezout matrix form sampl polynomi present effici algorithm factor bezout matrix recov latent imag make solut practic implement decrypt scheme graphic process unit gpu achiev realtim perform extens experi demonstr new scheme can effect protect sensit ident inform surveil video faith reconstruct unblur video stream cbp sequenc avail

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